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Dr. Gustavo Santoyo
Genomic Diversity Laboratory, Institute of Biological and Chemical Research,Universidad Michoacana de San Nicolas de Hidalgo, Morelia 58030, Mexico

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0 biocontrol
0 microbial mats
0 plant growth-promoting bacteria
0 Genome diversity
0 Rhizosphere ecology

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Review
Published: 13 August 2021 in Microorganisms
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Endophytic microorganisms present inside the host plant play an essential role in host fitness, nutrient supply and stress tolerance. Endophytes are often used in sustainable agriculture as biofertilizers, biopesticides and as inoculants to mitigate abiotic stresses including salinity, drought, cold and pH variation in the soil. In changing climatic conditions, abiotic stresses create global challenges to achieve optimum crop yields in agricultural production. Plants experience stress conditions that involve endogenous boosting of their immune system or the overexpression of their defensive redox regulatory systems with increased reactive oxygen species (ROS). However, rising stress factors overwhelm the natural redox protection systems of plants, which leads to massive internal oxidative damage and death. Endophytes are an integral internal partner of hosts and have been shown to mitigate abiotic stresses via modulating local or systemic mechanisms and producing antioxidants to counteract ROS in plants. Advancements in omics and other technologies have been made, but potential application of endophytes remains largely unrealized. In this review article, we will discuss the diversity, population and interaction of endophytes with crop plants as well as potential applications in abiotic stress management.

ACS Style

Hariom Verma; Dharmendra Kumar; Vinod Kumar; Madhuree Kumari; Sandeep Kumar Singh; Vijay Kumar Sharma; Samir Droby; Gustavo Santoyo; James F. White; Ajay Kumar. The Potential Application of Endophytes in Management of Stress from Drought and Salinity in Crop Plants. Microorganisms 2021, 9, 1729 .

AMA Style

Hariom Verma, Dharmendra Kumar, Vinod Kumar, Madhuree Kumari, Sandeep Kumar Singh, Vijay Kumar Sharma, Samir Droby, Gustavo Santoyo, James F. White, Ajay Kumar. The Potential Application of Endophytes in Management of Stress from Drought and Salinity in Crop Plants. Microorganisms. 2021; 9 (8):1729.

Chicago/Turabian Style

Hariom Verma; Dharmendra Kumar; Vinod Kumar; Madhuree Kumari; Sandeep Kumar Singh; Vijay Kumar Sharma; Samir Droby; Gustavo Santoyo; James F. White; Ajay Kumar. 2021. "The Potential Application of Endophytes in Management of Stress from Drought and Salinity in Crop Plants." Microorganisms 9, no. 8: 1729.

Original research article
Published: 05 August 2021 in Frontiers in Microbiology
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In recent decades, various bacterial species have been characterized as biocontrol agents for plant crop diseases; however, only a few genera have been predominantly reported in the literature. Therefore, the identification of new antagonists against phytopathogens is essential for boosting sustainable food production systems. In this study, we evaluated the role of strain SER3 from the recently discovered Rouxiella badensis as a biocontrol agent. SER3 was isolated from the phyllosphere of decaying strawberry fruit (Fragaria × ananassa) and showed different grades of antagonism against 20 fungal pathogens of berries, based on confrontation assays, due to the action of its diffusible and volatile compounds. These fungal pathogens were isolated from decayed strawberry, blackberry, and blueberry fruit and were characterized through internal transcribed spacer (ITS) sequencing and homology searches, exhibiting similarity with well-known postharvest pathogens such as Botrytis, Fusarium, Geotrichum, Mucor, Penicillium, Alternaria, and Botryosphaeria. Koch’s postulates were confirmed for most pathogens by reinfecting berry fruit. SER3 showed good capacity to inhibit the growth of Botrytis cinerea and Fusarium brachygibbosum in strawberry fruit, affecting mycelial development. To gain better understanding of the genetic and metabolic capacities of the SER3 strain, its draft genome was determined and was found to comprise a single chromosome of 5.08 Mb, 52.8% G + C content, and 4,545 protein-coding genes. Phylogenetic analysis indicated that the SER3 strain is affiliated with the R. badensis species, with an average nucleotide identity >96% and a genome-to-genome distance >70%. A comparison of the genomic properties of R. badensis SER3 and other close bacterial relatives showed several genes with potential functions in biocontrol activities, such as those encoding siderophores, non-ribosomal peptide synthetases, and polyketide synthases. This is the first study to demonstrate a novel role of the recently discovered R. badensis species (and any other species of the genus Rouxiella) as a biocontrol agent against postharvest fungal pathogens.

ACS Style

Luzmaria R. Morales-Cedeño; Sergio De Los Santos-Villalobos; Gustavo Santoyo. Functional and Genomic Analysis of Rouxiella badensis SER3 as a Novel Biocontrol Agent of Fungal Pathogens. Frontiers in Microbiology 2021, 12, 1 .

AMA Style

Luzmaria R. Morales-Cedeño, Sergio De Los Santos-Villalobos, Gustavo Santoyo. Functional and Genomic Analysis of Rouxiella badensis SER3 as a Novel Biocontrol Agent of Fungal Pathogens. Frontiers in Microbiology. 2021; 12 ():1.

Chicago/Turabian Style

Luzmaria R. Morales-Cedeño; Sergio De Los Santos-Villalobos; Gustavo Santoyo. 2021. "Functional and Genomic Analysis of Rouxiella badensis SER3 as a Novel Biocontrol Agent of Fungal Pathogens." Frontiers in Microbiology 12, no. : 1.

Journal article
Published: 05 July 2021 in Frontiers in Microbiology
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ACS Style

Alok Kumar Srivastava; Prem Lal Kashyap; Gustavo Santoyo; George Newcombe. Editorial: Plant Microbiome: Interactions, Mechanisms of Action, and Applications. Frontiers in Microbiology 2021, 12, 1 .

AMA Style

Alok Kumar Srivastava, Prem Lal Kashyap, Gustavo Santoyo, George Newcombe. Editorial: Plant Microbiome: Interactions, Mechanisms of Action, and Applications. Frontiers in Microbiology. 2021; 12 ():1.

Chicago/Turabian Style

Alok Kumar Srivastava; Prem Lal Kashyap; Gustavo Santoyo; George Newcombe. 2021. "Editorial: Plant Microbiome: Interactions, Mechanisms of Action, and Applications." Frontiers in Microbiology 12, no. : 1.

Review
Published: 08 June 2021 in Agronomy
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Plant growth-promoting bacteria (PGPB) are excellent biocontrol agents and stimulators of plant growth, nutrition, and production. Therefore, these plant-associated bacteria are considered an excellent alternative to reduce or eliminate the use of toxic agrochemicals. In this work, we review the current state of the beneficial mechanisms (direct and indirect), including the production of antibiotic compounds and enzymes, facilitation of resource acquisition, or production of stimulating phytohormones/metabolites. Some aspects of the formulation technology and bioinoculant efficiency of diverse PGPBs (e.g., rhizobacteria, phyllobacteria and endophytic bacteria) in the field are also discussed. However, the commercialization and application of these biological agents in agriculture occur mainly in developed countries, limiting their success in developing regions. The possible causes of the delay in the application of bioinoculants for sustainable agriculture and the plausible solutions are also discussed in this study. Finally, the use of PGPBs is currently a priority for sustainable production in agriculture.

ACS Style

Ma. Orozco-Mosqueda; Aurora Flores; Blanca Rojas-Sánchez; Carlos Urtis-Flores; Luzmaria Morales-Cedeño; María Valencia-Marin; Salvador Chávez-Avila; Daniel Rojas-Solis; Gustavo Santoyo. Plant Growth-Promoting Bacteria as Bioinoculants: Attributes and Challenges for Sustainable Crop Improvement. Agronomy 2021, 11, 1167 .

AMA Style

Ma. Orozco-Mosqueda, Aurora Flores, Blanca Rojas-Sánchez, Carlos Urtis-Flores, Luzmaria Morales-Cedeño, María Valencia-Marin, Salvador Chávez-Avila, Daniel Rojas-Solis, Gustavo Santoyo. Plant Growth-Promoting Bacteria as Bioinoculants: Attributes and Challenges for Sustainable Crop Improvement. Agronomy. 2021; 11 (6):1167.

Chicago/Turabian Style

Ma. Orozco-Mosqueda; Aurora Flores; Blanca Rojas-Sánchez; Carlos Urtis-Flores; Luzmaria Morales-Cedeño; María Valencia-Marin; Salvador Chávez-Avila; Daniel Rojas-Solis; Gustavo Santoyo. 2021. "Plant Growth-Promoting Bacteria as Bioinoculants: Attributes and Challenges for Sustainable Crop Improvement." Agronomy 11, no. 6: 1167.

Review
Published: 27 May 2021 in Biology
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The application of plant growth-promoting rhizobacteria (PGPR) in the field has been hampered by a number of gaps in the knowledge of the mechanisms that improve plant growth, health, and production. These gaps include (i) the ability of PGPR to colonize the rhizosphere of plants and (ii) the ability of bacterial strains to thrive under different environmental conditions. In this review, different strategies of PGPR to colonize the rhizosphere of host plants are summarized and the advantages of having highly competitive strains are discussed. Some mechanisms exhibited by PGPR to colonize the rhizosphere include recognition of chemical signals and nutrients from root exudates, antioxidant activities, biofilm production, bacterial motility, as well as efficient evasion and suppression of the plant immune system. Moreover, many PGPR contain secretion systems and produce antimicrobial compounds, such as antibiotics, volatile organic compounds, and lytic enzymes that enable them to restrict the growth of potentially phytopathogenic microorganisms. Finally, the ability of PGPR to compete and successfully colonize the rhizosphere should be considered in the development and application of bioinoculants.

ACS Style

Gustavo Santoyo; Carlos Urtis-Flores; Pedro Loeza-Lara; Ma. Orozco-Mosqueda; Bernard Glick. Rhizosphere Colonization Determinants by Plant Growth-Promoting Rhizobacteria (PGPR). Biology 2021, 10, 475 .

AMA Style

Gustavo Santoyo, Carlos Urtis-Flores, Pedro Loeza-Lara, Ma. Orozco-Mosqueda, Bernard Glick. Rhizosphere Colonization Determinants by Plant Growth-Promoting Rhizobacteria (PGPR). Biology. 2021; 10 (6):475.

Chicago/Turabian Style

Gustavo Santoyo; Carlos Urtis-Flores; Pedro Loeza-Lara; Ma. Orozco-Mosqueda; Bernard Glick. 2021. "Rhizosphere Colonization Determinants by Plant Growth-Promoting Rhizobacteria (PGPR)." Biology 10, no. 6: 475.

Research article
Published: 24 May 2021 in Geomicrobiology Journal
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Microbial mats are stratified systems of microorganisms that have served as models to study diverse ecological functions. Comparing the unique and shared characteristics between different microbial mats could shed new light on the biodiversity, functionality and genetic potential of these habitats. In this study, the taxonomic diversity of a microbial mat from the Araro hot springs (Trans-Mexican volcanic belt) was explored and compared with the metagenomes of microbial mats from Cuatro Ciénegas (Mexico), Guerrero Negro (Mexico), Shark Bay (Australia), Yellowstone (USA), and Diamond Fork (USA). The thermal Araro microbial mat was dominated by the phyla Chloroflexi (particularly Chloroflexus), Cyanobacteria, and Proteobacteria. Chlorobium was abundant at Diamond Fork; whereas Thermus, Synechococcus, and Bacillus were found at the remaining locations together with less abundant microbial groups. Alpha diversity indices were highest in Araro, Cuatro Ciénegas, and Shark Bay. Principal component analysis and hierarchical clustering separated Araro from the remaining microbial mats. SEED subsystems revealed carbohydrate metabolism, amino acids, and derivatives to be dominant functions in most mats, while protein and DNA metabolism were prevalent in Araro. Sequences related to biogeochemical cycles of N, Fe, C, O, and S were observed in all mats except Yellowstone (O cycle only), suggesting the presence of different trophic groups. In summary, the six metagenomes exhibit important taxonomic and functional differences, which could be related to their environmental and physicochemical adaptations.

ACS Style

Gustavo Santoyo. Unveiling Taxonomic Diversity and Functional Composition Differences of Microbial Mat Communities Through Comparative Metagenomics. Geomicrobiology Journal 2021, 1 -10.

AMA Style

Gustavo Santoyo. Unveiling Taxonomic Diversity and Functional Composition Differences of Microbial Mat Communities Through Comparative Metagenomics. Geomicrobiology Journal. 2021; ():1-10.

Chicago/Turabian Style

Gustavo Santoyo. 2021. "Unveiling Taxonomic Diversity and Functional Composition Differences of Microbial Mat Communities Through Comparative Metagenomics." Geomicrobiology Journal , no. : 1-10.

Review article
Published: 07 May 2021 in Frontiers in Sustainable Food Systems
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Soil microbiota plays an important role in the sustainable production of the different types of agrosystems. Among the members of the plant microbiota, mycorrhizal fungi (MF) and plant growth-promoting bacteria (PGPB) interact in rhizospheric environments leading to additive and/or synergistic effects on plant growth and heath. In this manuscript, the main mechanisms used by MF and PGPB to facilitate plant growth are reviewed, including the improvement of nutrient uptake, and the reduction of ethylene levels or biocontrol of potential pathogens, under both normal and stressful conditions due to abiotic or biotic factors. Finally, it is necessary to expand both research and field use of bioinoculants based on these components and take advantage of their beneficial interactions with plants to alleviate plant stress and improve plant growth and production to satisfy the demand for food for an ever-increasing human population.

ACS Style

Gustavo Santoyo; Elisa Gamalero; Bernard R. Glick. Mycorrhizal-Bacterial Amelioration of Plant Abiotic and Biotic Stress. Frontiers in Sustainable Food Systems 2021, 5, 1 .

AMA Style

Gustavo Santoyo, Elisa Gamalero, Bernard R. Glick. Mycorrhizal-Bacterial Amelioration of Plant Abiotic and Biotic Stress. Frontiers in Sustainable Food Systems. 2021; 5 ():1.

Chicago/Turabian Style

Gustavo Santoyo; Elisa Gamalero; Bernard R. Glick. 2021. "Mycorrhizal-Bacterial Amelioration of Plant Abiotic and Biotic Stress." Frontiers in Sustainable Food Systems 5, no. : 1.

Journal article
Published: 17 March 2021 in Current Research in Microbial Sciences
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The endophytic bacterial diversity of root, stem, and leaf tissues of Mexican husk tomato plants (Physalis ixocarpa) was compared and deciphered, and screened for their plant growth-promoting activity and antagonism against fungal phytopathogens. Total 315 isolates (108 roots, 102 stems, and 105 leaves) were obtained and characterized by 16S ribosomal gene sequencing. The most abundant genera were Bacillus, Microbacterium, Pseudomonas, and Stenotrophomonas. Unique species were found for each tissue analyzed, along with B. thuringiensis, B. toyonensis, Neobacillus drentensis, Paenibacillus castaneae, P. fluorescens, P. poae, and S. maltophilia present throughout the plant. Biodiversity indices did not show significant differences, but root tissues showed the highest abundance of bacterial endophytes. Several isolates showed excellent promotion activities in Physalis ixocarpa seedlings, increasing the length and weight of the root, total biomass, and chlorophyll content. Various isolates also exhibited antagonism against fungal pathogens. Among screened isolates, Neobacillus drentensis CH23 was found in all plant compartments, exhibiting growth-promoting activity and fungal antagonism. Strain CH23 and other endophytes showed the production of indoleacetic acid, siderophores, proteases, and solubilization of phosphates. These results demonstrate that the husk tomato plant endobiome has a high potential as a bioinoculating agent for agriculturally important crops.

ACS Style

Claudia E. Hernández-Pacheco; Ma Del Carmen Orozco-Mosqueda; Aurora Flores; Eduardo Valencia-Cantero; Gustavo Santoyo. Tissue-specific diversity of bacterial endophytes in Mexican husk tomato plants (Physalis ixocarpa Brot. ex Horm.), and screening for their multiple plant growth-promoting activities. Current Research in Microbial Sciences 2021, 2, 100028 .

AMA Style

Claudia E. Hernández-Pacheco, Ma Del Carmen Orozco-Mosqueda, Aurora Flores, Eduardo Valencia-Cantero, Gustavo Santoyo. Tissue-specific diversity of bacterial endophytes in Mexican husk tomato plants (Physalis ixocarpa Brot. ex Horm.), and screening for their multiple plant growth-promoting activities. Current Research in Microbial Sciences. 2021; 2 ():100028.

Chicago/Turabian Style

Claudia E. Hernández-Pacheco; Ma Del Carmen Orozco-Mosqueda; Aurora Flores; Eduardo Valencia-Cantero; Gustavo Santoyo. 2021. "Tissue-specific diversity of bacterial endophytes in Mexican husk tomato plants (Physalis ixocarpa Brot. ex Horm.), and screening for their multiple plant growth-promoting activities." Current Research in Microbial Sciences 2, no. : 100028.

Journal article
Published: 01 February 2021 in Journal of the Selva Andina Research Society
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El género y especie Rhizobium phaseoli es usado como inoculante en la producción de Phaseolus vulgaris (fríjol), porque en los nódulos de sus raíces, establece una simbiosis para fijar el nitrógeno molecular (FBN) y suplir la demanda de nitrógeno (N) para un crecimiento sano. En el cultivo de P. vulgaris se aplican plaguicidas en el control de insectos plaga de raíz, que evitan el efecto benéfico de R. phaseoli., por lo que los objetivos de este trabajo fueron aislar y seleccionar R. phaseoli tolerante a diazinón. Para ello, R. phaseoli se creció en caldo extracto levadura manitol con diazinón y selecciono R. phaseoli tolerante al insecticida e inoculó en P. vulgaris para determinar la infectividad con base en el número de nódulos, mientras que la efectividad para la FBN en la raíz, de acuerdo al incremento en el peso fresco y seco, en la altura de la planta, y en la capacidad para degradar el diazinón. Se concluye que el R. phaseoli tolerante a diazinón fue infectivo y efectivo para el sano crecimiento de P. vulgaris.

ACS Style

Gustavo Santoyo-Pizano; José Luis Hernández-Mendoza; Liliana Márquez-Benavides; Gustavo De Luna-Esquivel; Juan Manuel Sánchez-Yáñez. Rhizobium phaseoli tolerante a un insecticida en el crecimiento de Phaseolus vulgaris. Journal of the Selva Andina Research Society 2021, 12, 30 -37.

AMA Style

Gustavo Santoyo-Pizano, José Luis Hernández-Mendoza, Liliana Márquez-Benavides, Gustavo De Luna-Esquivel, Juan Manuel Sánchez-Yáñez. Rhizobium phaseoli tolerante a un insecticida en el crecimiento de Phaseolus vulgaris. Journal of the Selva Andina Research Society. 2021; 12 (1):30-37.

Chicago/Turabian Style

Gustavo Santoyo-Pizano; José Luis Hernández-Mendoza; Liliana Márquez-Benavides; Gustavo De Luna-Esquivel; Juan Manuel Sánchez-Yáñez. 2021. "Rhizobium phaseoli tolerante a un insecticida en el crecimiento de Phaseolus vulgaris." Journal of the Selva Andina Research Society 12, no. 1: 30-37.

Journal article
Published: 01 February 2021 in Journal of the Selva Andina Research Society
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The genus and species of Rhizobium phaseoli are useful as an inoculant for the production of Phaseolus vulgaris (beans) in the root nodules symbiotic stage fixes molecular nitrogen (FN) for supplying nitrogen (N) for healthy growth. In P. vulgaris cropping, pesticides are used to control root insects, which could reduce the beneficial effect of R. phaseoli. The purpose of this work was to isolate and select R. phaseoli diazinon´s tolerance. In that sense, R. phaseoli were cultivated in a medium mixed with diazinon in order to select R. phaseoli tolerant to the pesticide. This mutant of R. phaseoli tolerant to diazinon was inoculated in P. vulgaris the effect was evaluated 45 days later. The response of P. vulgaris was measured by the number of effective nodules at the roots, fresh and dry weight, and the height of the plant. Results showed that R. phaseoli tolerant to diazinon kept its beneficial activity for the healthy growth of P. vulgaris. It was concluded that R. phaseoli tolerant to diazinon were infec-tive and effective for the health growth of P. vulgaris.

ACS Style

Gustavo Santoyo-Pizano; José Luis Hernández-Mendoza; Liliana Márquez-Benavides; Gustavo De Luna-Esquivel; Juan Manuel Sánchez-Yáñez. Rhizobium phaseoli tolerant to insecticide on the growth of Phaseolus vulgaris. Journal of the Selva Andina Research Society 2021, 12, 30 -37.

AMA Style

Gustavo Santoyo-Pizano, José Luis Hernández-Mendoza, Liliana Márquez-Benavides, Gustavo De Luna-Esquivel, Juan Manuel Sánchez-Yáñez. Rhizobium phaseoli tolerant to insecticide on the growth of Phaseolus vulgaris. Journal of the Selva Andina Research Society. 2021; 12 (1):30-37.

Chicago/Turabian Style

Gustavo Santoyo-Pizano; José Luis Hernández-Mendoza; Liliana Márquez-Benavides; Gustavo De Luna-Esquivel; Juan Manuel Sánchez-Yáñez. 2021. "Rhizobium phaseoli tolerant to insecticide on the growth of Phaseolus vulgaris." Journal of the Selva Andina Research Society 12, no. 1: 30-37.

Review
Published: 24 January 2021 in Agronomy
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Plant-associated microorganisms play an important role in agricultural production. Although various studies have shown that single microorganisms can exert beneficial effects on plants, it is increasingly evident that when a microbial consortium—two or more interacting microorganisms—is involved, additive or synergistic results can be expected. This occurs, in part, due to the fact that multiple species can perform a variety of tasks in an ecosystem like the rhizosphere. Therefore, the beneficial mechanisms of plant growth stimulation (i.e., enhanced nutrient availability, phytohormone modulation, biocontrol, biotic and abiotic stress tolerance) exerted by different microbial players within the rhizosphere, such as plant-growth-promoting bacteria (PGPB) and fungi (such as Trichoderma and Mycorrhizae), are reviewed. In addition, their interaction and beneficial activity are highlighted when they act as part of a consortium, mainly as mixtures of different species of PGPB, PGPB–Mycorrhizae, and PGPB–Trichoderma, under normal and diverse stress conditions. Finally, we propose the expansion of the use of different microbial consortia, as well as an increase in research on different mixtures of microorganisms that facilitate the best and most consistent results in the field.

ACS Style

Gustavo Santoyo; Paulina Guzmán-Guzmán; Fannie Isela Parra-Cota; Sergio De Los Santos-Villalobos; Ma. Del Carmen Orozco-Mosqueda; Bernard R. Glick. Plant Growth Stimulation by Microbial Consortia. Agronomy 2021, 11, 219 .

AMA Style

Gustavo Santoyo, Paulina Guzmán-Guzmán, Fannie Isela Parra-Cota, Sergio De Los Santos-Villalobos, Ma. Del Carmen Orozco-Mosqueda, Bernard R. Glick. Plant Growth Stimulation by Microbial Consortia. Agronomy. 2021; 11 (2):219.

Chicago/Turabian Style

Gustavo Santoyo; Paulina Guzmán-Guzmán; Fannie Isela Parra-Cota; Sergio De Los Santos-Villalobos; Ma. Del Carmen Orozco-Mosqueda; Bernard R. Glick. 2021. "Plant Growth Stimulation by Microbial Consortia." Agronomy 11, no. 2: 219.

Brief report
Published: 07 January 2021 in Microbiology Resource Announcements
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Bacillus sp. strain E25 is an endophytic strain isolated from husk tomato roots in Michoacán, México, that displayed excellent biocontrol and plant growth-promoting activities under normal and salt stress conditions. This draft genome report confirms the presence of genes involved in direct and indirect mechanisms to stimulate plant growth and health.

ACS Style

Adrián Pérez-Equihua; Gustavo Santoyo. Draft Genome Sequence of Bacillus sp. Strain E25, a Biocontrol and Plant Growth-Promoting Bacterial Endophyte Isolated from Mexican Husk Tomato Roots (Physalis ixocarpa Brot. Ex Horm.). Microbiology Resource Announcements 2021, 10, 1 .

AMA Style

Adrián Pérez-Equihua, Gustavo Santoyo. Draft Genome Sequence of Bacillus sp. Strain E25, a Biocontrol and Plant Growth-Promoting Bacterial Endophyte Isolated from Mexican Husk Tomato Roots (Physalis ixocarpa Brot. Ex Horm.). Microbiology Resource Announcements. 2021; 10 (1):1.

Chicago/Turabian Style

Adrián Pérez-Equihua; Gustavo Santoyo. 2021. "Draft Genome Sequence of Bacillus sp. Strain E25, a Biocontrol and Plant Growth-Promoting Bacterial Endophyte Isolated from Mexican Husk Tomato Roots (Physalis ixocarpa Brot. Ex Horm.)." Microbiology Resource Announcements 10, no. 1: 1.

Review article
Published: 07 December 2020 in Current Plant Biology
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The study of plant-endophyte interactions is complex and difficult to decipher. In part, this is because they are dynamic and diverse; these interactions can be mutualistic, commensalistic, symbiotic, and trophobiotic and can change over the different stages of plant development. However, revealing the complete genomes of these endophytic microorganisms (i.e., the plant endobiome) is making it possible to know more about the molecular basis for these interactions, in particular, the sequencing of complete or draft genomes of beneficial endophytic fungi and bacteria that are agriculturally relevant. Likewise, comparative genomic explorations provide new clues on the endophytic lifestyle of microbes. This work reviews the diversity of the plant microendobiome, with an emphasis on fungi and bacteria, and the beneficial interactions that have been discovered through genomic analyses. We also discuss some basic functions that would allow the differentiation of endophytic microbes from other non-endophytic associations, and how these are relevant to endophytic modus vivendi. Finally, we propose new sustainable agricultural strategies based on new knowledge of the plant endobiome and its beneficial interactions with plants, which has been revealed through genomic explorations.

ACS Style

Ma. Del Carmen Orozco-Mosqueda; Gustavo Santoyo. Plant-microbial endophytes interactions: Scrutinizing their beneficial mechanisms from genomic explorations. Current Plant Biology 2020, 25, 100189 .

AMA Style

Ma. Del Carmen Orozco-Mosqueda, Gustavo Santoyo. Plant-microbial endophytes interactions: Scrutinizing their beneficial mechanisms from genomic explorations. Current Plant Biology. 2020; 25 ():100189.

Chicago/Turabian Style

Ma. Del Carmen Orozco-Mosqueda; Gustavo Santoyo. 2020. "Plant-microbial endophytes interactions: Scrutinizing their beneficial mechanisms from genomic explorations." Current Plant Biology 25, no. : 100189.

Review article
Published: 29 September 2020 in Microbiological Research
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Sustainable agriculture requires the recruitment of bacterial agents to control diverse plant diseases such as bacterial endophytes. Bacterial endophytes colonize and inhabit internal plant tissues without causing any apparent damage. Within the plant, these bacteria exert multiple beneficiary effects, including direct stimulation of plant growth by the action of phytohormones or the production of metabolites. However, bacterial endophytes also protect their plant host through biocontrol pathogens or by inducing plant innate immune system. The present work makes a systematic and in-depth review on the current state of endophytic bacterial diversity, their plant colonization strategies, and their potential roles as protective agents against plant diseases during pre- and post-harvest stages of crop productivity. In addition, an exploration of their beneficial effects on sustainable agriculture by reducing/eliminating the use of toxic agrochemicals was conducted. Finally, we propose diverse effective strategies for the application of endophytic bacteria as biological agents during both pre- and post-harvest stages, with the aim of protecting crop plants and their agricultural products.

ACS Style

Luzmaria R. Morales-Cedeño; Ma. Del Carmen Orozco-Mosqueda; Pedro D. Loeza-Lara; Fannie I. Parra-Cota; Sergio De Los Santos-Villalobos; Gustavo Santoyo. Plant growth-promoting bacterial endophytes as biocontrol agents of pre- and post-harvest diseases: Fundamentals, methods of application and future perspectives. Microbiological Research 2020, 242, 126612 .

AMA Style

Luzmaria R. Morales-Cedeño, Ma. Del Carmen Orozco-Mosqueda, Pedro D. Loeza-Lara, Fannie I. Parra-Cota, Sergio De Los Santos-Villalobos, Gustavo Santoyo. Plant growth-promoting bacterial endophytes as biocontrol agents of pre- and post-harvest diseases: Fundamentals, methods of application and future perspectives. Microbiological Research. 2020; 242 ():126612.

Chicago/Turabian Style

Luzmaria R. Morales-Cedeño; Ma. Del Carmen Orozco-Mosqueda; Pedro D. Loeza-Lara; Fannie I. Parra-Cota; Sergio De Los Santos-Villalobos; Gustavo Santoyo. 2020. "Plant growth-promoting bacterial endophytes as biocontrol agents of pre- and post-harvest diseases: Fundamentals, methods of application and future perspectives." Microbiological Research 242, no. : 126612.

Preprint content
Published: 24 August 2020
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Despite the crucial role of microorganisms to sustain life on Earth, there is little research on the evolution of thermal tolerance of bacteria in the face of the challenge that global warming poses. Phenotypic adaptation to a new environment requires plasticity to allow individuals to respond to selective forces, followed by adaptive evolution. We do not know to what extent phenotypic plasticity allows thermal tolerance evolution in bacteria at the border of their physiological limits. We analyzed growth and thermal reaction norms to temperature of strains of two bacterial lineages, Bacillus cereus sensu lato and Bacillus subtilis sensu lato, that evolved in two contrasting environments, a temperate lagoon (T) and a hot spring (H). Our results showed that despite co-occurrence of members of both lineages in the two contrasting environments, norms of reactions to temperature exhibited a similar pattern only within the lineages, suggesting fixed phenotypic plasticity. Additionally, within the B. cereus lineage, strains from the H environment showed only two to three °C more heat tolerance than strains from the T environment. The limited evolutionary changes towards an increase in heat tolerance in bacteria should alert us of the negative impact that climate change can have on all biological cycles in the planet.

ACS Style

Enrique Hurtado-Bautista; Laura F. Pérez-Sánchez; Africa Islas-Robles; Gustavo Santoyo; Gabriela Olmedo-Alvarez. Phenotypic plasticity and evolution of thermal tolerance in two lineages of bacteria from temperate and hot environments. 2020, 1 .

AMA Style

Enrique Hurtado-Bautista, Laura F. Pérez-Sánchez, Africa Islas-Robles, Gustavo Santoyo, Gabriela Olmedo-Alvarez. Phenotypic plasticity and evolution of thermal tolerance in two lineages of bacteria from temperate and hot environments. . 2020; ():1.

Chicago/Turabian Style

Enrique Hurtado-Bautista; Laura F. Pérez-Sánchez; Africa Islas-Robles; Gustavo Santoyo; Gabriela Olmedo-Alvarez. 2020. "Phenotypic plasticity and evolution of thermal tolerance in two lineages of bacteria from temperate and hot environments." , no. : 1.

Journal article
Published: 20 August 2020 in Applied Sciences
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Bacterial endophytes can colonize plant tissues without harming the plant. Instead, they are often able to increase plant growth and tolerance to environmental stresses. In this work, new strains of bacterial endophytes were isolated from three economically important crop plants (sorghum, cucumber and tomato) grown in three different regions in soils with different management. All bacterial strains were identified by 16S rRNA sequencing and characterized for plant beneficial traits. Based on physiological activities, we selected eight strains that were further tested for their antibiotic resistance profile and for the ability to efficiently colonize the interior of sorghum plants. According to the results of the re-inoculation test, five strains were used to inoculate sorghum seeds. Then, plant growth promotion activity was assessed on sorghum plants exposed to salinity stress. Only two bacterial endophytes increased plant biomass, but three of them delayed or reduced plant salinity stress symptoms. These five strains were then characterized for the ability to produce the enzyme 1-aminocyclopropane-1-carboxylate (ACC) deaminase, which is involved in the increase of stress tolerance. Pseudomonas brassicacearum SVB6R1 was the only strain that was able to produce this enzyme, suggesting that ACC deaminase is not the only physiological trait involved in conferring plant tolerance to salt stress in these bacterial strains.

ACS Style

Elisa Gamalero; Nicoletta Favale; Elisa Bona; Giorgia Novello; Patrizia Cesaro; Nadia Massa; Bernard R. Glick; Ma Del Carmen Orozco-Mosqueda; Graziella Berta; Guido Lingua. Screening of Bacterial Endophytes Able to Promote Plant Growth and Increase Salinity Tolerance. Applied Sciences 2020, 10, 5767 .

AMA Style

Elisa Gamalero, Nicoletta Favale, Elisa Bona, Giorgia Novello, Patrizia Cesaro, Nadia Massa, Bernard R. Glick, Ma Del Carmen Orozco-Mosqueda, Graziella Berta, Guido Lingua. Screening of Bacterial Endophytes Able to Promote Plant Growth and Increase Salinity Tolerance. Applied Sciences. 2020; 10 (17):5767.

Chicago/Turabian Style

Elisa Gamalero; Nicoletta Favale; Elisa Bona; Giorgia Novello; Patrizia Cesaro; Nadia Massa; Bernard R. Glick; Ma Del Carmen Orozco-Mosqueda; Graziella Berta; Guido Lingua. 2020. "Screening of Bacterial Endophytes Able to Promote Plant Growth and Increase Salinity Tolerance." Applied Sciences 10, no. 17: 5767.

Review article
Published: 01 August 2020 in Journal of Environmental Management
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The concept of soil health refers to specific soil properties and the ability to support and sustain crop growth and productivity, while maintaining long-term environmental quality. The key components of healthy soil are high populations of organisms that promote plant growth, such as the plant growth promoting rhizobacteria (PGPR). PGPR plays multiple beneficial and ecological roles in the rhizosphere soil. Among the roles of PGPR in agroecosystems are the nutrient cycling and uptake, inhibition of potential phytopathogens growth, stimulation of plant innate immunity, and direct enhancement of plant growth by producing phytohormones or other metabolites. Other important roles of PGPR are their environmental cleanup capacities (soil bioremediation). In this work, we review recent literature concerning the diverse mechanisms of PGPR in maintaining healthy conditions of agricultural soils, thus reducing (or eliminating) the toxic agrochemicals dependence. In conclusion, this review provides comprehensive knowledge on the current PGPR basic mechanisms and applications as biocontrol agents, plant growth stimulators and soil rhizoremediators, with the final goal of having more agroecological practices for sustainable agriculture.

ACS Style

Zobia Khatoon; Suiliang Huang; Mazhar Rafique; Ali Fakhar; Muhammad Aqeel Kamran; Gustavo Santoyo. Unlocking the potential of plant growth-promoting rhizobacteria on soil health and the sustainability of agricultural systems. Journal of Environmental Management 2020, 273, 111118 .

AMA Style

Zobia Khatoon, Suiliang Huang, Mazhar Rafique, Ali Fakhar, Muhammad Aqeel Kamran, Gustavo Santoyo. Unlocking the potential of plant growth-promoting rhizobacteria on soil health and the sustainability of agricultural systems. Journal of Environmental Management. 2020; 273 ():111118.

Chicago/Turabian Style

Zobia Khatoon; Suiliang Huang; Mazhar Rafique; Ali Fakhar; Muhammad Aqeel Kamran; Gustavo Santoyo. 2020. "Unlocking the potential of plant growth-promoting rhizobacteria on soil health and the sustainability of agricultural systems." Journal of Environmental Management 273, no. : 111118.

Article
Published: 05 June 2020 in Current Microbiology
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Salinity is one of the most important factors that limit the productivity of agricultural soils. Certain plant growth-promoting bacteria (PGPB) have the ability to stimulate the growth of crop plants even under salt stress. In the present study, we analysed the potential of PGPB Bacillus toyonensis COPE52 to improve the growth of tomato plants and its capacity to modify its membrane lipid and fatty acid composition under salt stress. Thus, strain COPE52 increased the relative amount of branched chain fatty acids (15:0i and 16:1∆9) and accumulation of an unknown membrane lipid, while phosphatidylethanolamine (PE) levels decreased during growth with 100 and 200 mM NaCl. Importantly, direct and indirect plant growth-promoting (PGP) mechanisms of B. toyonensis COPE52, such as indole-3-acetic acid (IAA), protease activity, biofilm formation, and antifungal activity against Botrytis cinerea, remained unchanged in the presence of NaCl in vitro, compared to controls without salt. In a greenhouse experiment, tomato plants (Lycopersicon esculentum ‘Saladette’) showed increased shoot and root length, higher dry biomass, and chlorophyll content when inoculated with B. toyonensis COPE52 at 0 and 100 mM NaCl. In summary, these results indicate that Bacillus toyonensis COPE52 can modify cell membrane lipid components as a potential protecting mechanism to maintain PGP traits under saline-soil conditions.

ACS Style

Daniel Rojas-Solis; Miguel A. Vences-Guzmán; Christian Sohlenkamp; Gustavo Santoyo. Bacillus toyonensis COPE52 Modifies Lipid and Fatty Acid Composition, Exhibits Antifungal Activity, and Stimulates Growth of Tomato Plants Under Saline Conditions. Current Microbiology 2020, 77, 2735 -2744.

AMA Style

Daniel Rojas-Solis, Miguel A. Vences-Guzmán, Christian Sohlenkamp, Gustavo Santoyo. Bacillus toyonensis COPE52 Modifies Lipid and Fatty Acid Composition, Exhibits Antifungal Activity, and Stimulates Growth of Tomato Plants Under Saline Conditions. Current Microbiology. 2020; 77 (10):2735-2744.

Chicago/Turabian Style

Daniel Rojas-Solis; Miguel A. Vences-Guzmán; Christian Sohlenkamp; Gustavo Santoyo. 2020. "Bacillus toyonensis COPE52 Modifies Lipid and Fatty Acid Composition, Exhibits Antifungal Activity, and Stimulates Growth of Tomato Plants Under Saline Conditions." Current Microbiology 77, no. 10: 2735-2744.

Journal article
Published: 05 June 2020 in Current Microbiology
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Daniel Rojas-Solis; Miguel A Vences-Guzmán; Christian Sohlenkamp; Gustavo Santoyo. Bacillus toyonensis COPE52 Modifies Lipid and Fatty Acid Composition, Exhibits Antifungal Activity, and Stimulates Growth of Tomato Plants Under Saline Conditions. Current Microbiology 2020, 1 .

AMA Style

Daniel Rojas-Solis, Miguel A Vences-Guzmán, Christian Sohlenkamp, Gustavo Santoyo. Bacillus toyonensis COPE52 Modifies Lipid and Fatty Acid Composition, Exhibits Antifungal Activity, and Stimulates Growth of Tomato Plants Under Saline Conditions. Current Microbiology. 2020; ():1.

Chicago/Turabian Style

Daniel Rojas-Solis; Miguel A Vences-Guzmán; Christian Sohlenkamp; Gustavo Santoyo. 2020. "Bacillus toyonensis COPE52 Modifies Lipid and Fatty Acid Composition, Exhibits Antifungal Activity, and Stimulates Growth of Tomato Plants Under Saline Conditions." Current Microbiology , no. : 1.

Genome reports
Published: 28 April 2020 in 3 Biotech
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Aurora Flores; J. Trinidad Diaz-Zamora; Ma. Del Carmen Orozco-Mosqueda; Ana Chávez; Sergio De Los Santos Villalobos; Eduardo Valencia-Cantero; Gustavo Santoyo. Bridging genomics and field research: draft genome sequence of Bacillus thuringiensis CR71, an endophytic bacterium that promotes plant growth and fruit yield in Cucumis sativus L. 3 Biotech 2020, 10, 1 -7.

AMA Style

Aurora Flores, J. Trinidad Diaz-Zamora, Ma. Del Carmen Orozco-Mosqueda, Ana Chávez, Sergio De Los Santos Villalobos, Eduardo Valencia-Cantero, Gustavo Santoyo. Bridging genomics and field research: draft genome sequence of Bacillus thuringiensis CR71, an endophytic bacterium that promotes plant growth and fruit yield in Cucumis sativus L. 3 Biotech. 2020; 10 (5):1-7.

Chicago/Turabian Style

Aurora Flores; J. Trinidad Diaz-Zamora; Ma. Del Carmen Orozco-Mosqueda; Ana Chávez; Sergio De Los Santos Villalobos; Eduardo Valencia-Cantero; Gustavo Santoyo. 2020. "Bridging genomics and field research: draft genome sequence of Bacillus thuringiensis CR71, an endophytic bacterium that promotes plant growth and fruit yield in Cucumis sativus L." 3 Biotech 10, no. 5: 1-7.