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Dr. Rihab DJEBAILI
University of L'Aquila, Deparment of Life, Health and Environmental Sciences

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0 Crop Protection
0 biofertilizer
0 Plant Microbe Interactions
0 Microbiological Biodiversity
0 Environnemental stress

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Journal article
Published: 10 April 2021 in Soil Systems
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This study aimed to characterize the halotolerant capability, in vitro, of selected actinomycetes strains and to evaluate their competence in promoting halo stress tolerance in durum wheat in a greenhouse experiment. Fourteen isolates were tested for phosphate solubilization, indole acetic acid, hydrocyanic acid, and ammonia production under different salt concentrations (i.e., 0, 0.25, 0.5, 0.75, 1, 1.25, and 1.5 M NaCl). The presence of 1-aminocyclopropane-1-carboxylate deaminase activity was also investigated. Salinity tolerance was evaluated in durum wheat through plant growth and development parameters: shoot and root length, dry and ash-free dry weight, and the total chlorophyll content, as well as proline accumulation. In vitro assays have shown that the strains can solubilize inorganic phosphate and produce indole acetic acid, hydrocyanic acid, and ammonia under different salt concentrations. Most of the strains (86%) had 1-aminocyclopropane-1-carboxylate deaminase activity, with significant amounts of α-ketobutyric acid. In the greenhouse experiment, inoculation with actinomycetes strains improved the morpho-biochemical parameters of durum wheat plants, which also recorded significantly higher content of chlorophylls and proline than those uninoculated, both under normal and stressed conditions. Our results suggest that inoculation of halotolerant actinomycetes can mitigate the negative effects of salt stress and allow normal growth and development of durum wheat plants.

ACS Style

Rihab Djebaili; Marika Pellegrini; Massimiliano Rossi; Cinzia Forni; Maria Smati; Maddalena Del Gallo; Mahmoud Kitouni. Characterization of Plant Growth-Promoting Traits and Inoculation Effects on Triticum durum of Actinomycetes Isolates under Salt Stress Conditions. Soil Systems 2021, 5, 26 .

AMA Style

Rihab Djebaili, Marika Pellegrini, Massimiliano Rossi, Cinzia Forni, Maria Smati, Maddalena Del Gallo, Mahmoud Kitouni. Characterization of Plant Growth-Promoting Traits and Inoculation Effects on Triticum durum of Actinomycetes Isolates under Salt Stress Conditions. Soil Systems. 2021; 5 (2):26.

Chicago/Turabian Style

Rihab Djebaili; Marika Pellegrini; Massimiliano Rossi; Cinzia Forni; Maria Smati; Maddalena Del Gallo; Mahmoud Kitouni. 2021. "Characterization of Plant Growth-Promoting Traits and Inoculation Effects on Triticum durum of Actinomycetes Isolates under Salt Stress Conditions." Soil Systems 5, no. 2: 26.

Journal article
Published: 15 March 2021 in Communications in Soil Science and Plant Analysis
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Arbuscular mycorrhizal fungi (AMF) are widely distributed soil-borne microorganisms, which have a symbiotic relationship with several terrestrial plants. They play a key role in plant growth promotion and development, plant nutrient homeostasis, soil nutrient management, and induction of plant defense mechanisms against pest infestation and disease incidences. This interaction of AMF with rice plants has been studied in great detail, providing distinct perspectives on the natural basis of nutrient transport, stress management, improvement of soil health, and induction of systemic plant resistance. This review highlights the responses of (i) AMF interaction with rice plants, (ii) AMF colonization and sporulation potential in rice rhizosphere, (iii) AMF species as a source of inoculum for rice production, (iv) AMF for rice plant maintenance and durability, and (v) AMF responses to other soil microorganisms. Additionally, a new class of phytohormones known as strigolactone (SLs) has been briefly described covering the various forms of analogs, isomers, and membrane transporters. The role of SLs in pre-symbiotic molecular talks, induction of energy metabolism in mitochondria, spore germination, stimulation of hyphal branches, and the relationships of SLs synthesis with soil nutrient content provides in-depth insights into the mechanisms involved in improving AMF interactions with rice plants.

ACS Style

Debasis Mitra; Guerra Sierra B. E.; Bahman Khoshru; Sergio De Los Santos Villalobos; Claudia Belz; Priya Chaudhary; Faride Noroozi Shahri; Rihab Djebaili; Nurudeen Olatunbosun Adeyemi; Enas M. El-Ballat; Mohamed A. El-Esawi; Shokufeh Moradi; Rittick Mondal; Ansuman Senapati; Periyasamy Panneerselvam; Pradeep K. Das Mohapatra. Impacts of Arbuscular Mycorrhizal Fungi on Rice Growth, Development, and Stress Management With a Particular Emphasis on Strigolactone Effects on Root Development. Communications in Soil Science and Plant Analysis 2021, 52, 1591 -1621.

AMA Style

Debasis Mitra, Guerra Sierra B. E., Bahman Khoshru, Sergio De Los Santos Villalobos, Claudia Belz, Priya Chaudhary, Faride Noroozi Shahri, Rihab Djebaili, Nurudeen Olatunbosun Adeyemi, Enas M. El-Ballat, Mohamed A. El-Esawi, Shokufeh Moradi, Rittick Mondal, Ansuman Senapati, Periyasamy Panneerselvam, Pradeep K. Das Mohapatra. Impacts of Arbuscular Mycorrhizal Fungi on Rice Growth, Development, and Stress Management With a Particular Emphasis on Strigolactone Effects on Root Development. Communications in Soil Science and Plant Analysis. 2021; 52 (14):1591-1621.

Chicago/Turabian Style

Debasis Mitra; Guerra Sierra B. E.; Bahman Khoshru; Sergio De Los Santos Villalobos; Claudia Belz; Priya Chaudhary; Faride Noroozi Shahri; Rihab Djebaili; Nurudeen Olatunbosun Adeyemi; Enas M. El-Ballat; Mohamed A. El-Esawi; Shokufeh Moradi; Rittick Mondal; Ansuman Senapati; Periyasamy Panneerselvam; Pradeep K. Das Mohapatra. 2021. "Impacts of Arbuscular Mycorrhizal Fungi on Rice Growth, Development, and Stress Management With a Particular Emphasis on Strigolactone Effects on Root Development." Communications in Soil Science and Plant Analysis 52, no. 14: 1591-1621.

Review
Published: 11 February 2021 in Journal of Plant Nutrition
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The impact of stress on crop productivity and the ecosystem have been magnified by climate changes and mispractices in the agriculture field. Soil microbiome is a diverse system consisting of various microorganisms. Environmental control techniques like the use of arbuscular mycorrhizal fungi (AMF) are necessary to enhance crop productivity. AMF is known as stress regulating organisms that help plants within the nutrient uptake, biotic and abiotic stress management, plant protection, and consequently enhancement on crop yields. Also, host plants can tolerate many difficult situations such as water problems, salt stress, heavy metals, and temperature changes through AMF inoculation. Arbuscular mycorrhizae (AM) enhance plant growth under stress by mediating a series of complex contact events between the two symbiotic partners resulting in a good photosynthetic and gas exchange amelioration. Plants have several tolerance mechanisms to deal with the constraints of environmental changes. The antioxidant ability is the principal tolerance mechanism; it is assisted by osmolytes accumulation and exacting absorption of ions. In this review, we will discuss the effect of AMF colonization on the host plants at different stages of growth, with comprehensively updated knowledge, their roles, and applications for plant growth enhancement and mycorrhizae role on plant resistance induction and stress management.

ACS Style

Debasis Mitra; Rihab Djebaili; Marika Pellegrini; Bhaswatimayee Mahakur; Aniruddha Sarker; Priya Chaudhary; Bahman Khoshru; Maddalena Del Gallo; Mahmoud Kitouni; Durga P. Barik; Periyasamy Panneerselvam; Pradeep K. Das Mohapatra. Arbuscular mycorrhizal symbiosis: plant growth improvement and induction of resistance under stressful conditions. Journal of Plant Nutrition 2021, 44, 1993 -2028.

AMA Style

Debasis Mitra, Rihab Djebaili, Marika Pellegrini, Bhaswatimayee Mahakur, Aniruddha Sarker, Priya Chaudhary, Bahman Khoshru, Maddalena Del Gallo, Mahmoud Kitouni, Durga P. Barik, Periyasamy Panneerselvam, Pradeep K. Das Mohapatra. Arbuscular mycorrhizal symbiosis: plant growth improvement and induction of resistance under stressful conditions. Journal of Plant Nutrition. 2021; 44 (13):1993-2028.

Chicago/Turabian Style

Debasis Mitra; Rihab Djebaili; Marika Pellegrini; Bhaswatimayee Mahakur; Aniruddha Sarker; Priya Chaudhary; Bahman Khoshru; Maddalena Del Gallo; Mahmoud Kitouni; Durga P. Barik; Periyasamy Panneerselvam; Pradeep K. Das Mohapatra. 2021. "Arbuscular mycorrhizal symbiosis: plant growth improvement and induction of resistance under stressful conditions." Journal of Plant Nutrition 44, no. 13: 1993-2028.

Journal article
Published: 05 June 2020 in Sustainability
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Excessive use of chemical products in agriculture is causing significant environmental pollution and the loss of lands and fertility of agricultural soils. Plant-growth-promoting bacteria are a valid alternative strategy for sustainable agriculture. The aim of this study was to select actinomycete strains based on their plant-growth-promoting traits and to investigate their root association abilities and biostimulant effects on Solanum lycopersicum. The strains were investigated for their phosphate solubilization ability, production of indole-3-acetic acid, hydrocyanic acid, and ammonia, and several enzymatic activities. Bacteria–plant-root associations were studied by scanning electron microscopy. A greenhouse experiment was carried out to assess inoculation effects. Of sixty isolates, fourteen strains showed significant plant-growth-promoting traits. All fourteen strains solubilized phosphate, produced ammonia, and showed several enzymatic activities at different rates. The production of indole-3-acetic acid was shown by nine strains, while hydrocyanic acid production was observed in eleven of them. Scanning electron microscopy revealed that strains have good in vitro plant root association and colonization abilities. In planta inoculation by actinomycete strains positively influenced plant growth parameters. The best results were shown by seven actinomycete strains, suggesting their possible utilization as biofertilizer agents for sustainable agriculture.

ACS Style

Rihab Djebaili; Marika Pellegrini; Maria Smati; Maddalena Del Gallo; Mahmoud Kitouni. Actinomycete Strains Isolated from Saline Soils: Plant-Growth-Promoting Traits and Inoculation Effects on Solanum lycopersicum. Sustainability 2020, 12, 4617 .

AMA Style

Rihab Djebaili, Marika Pellegrini, Maria Smati, Maddalena Del Gallo, Mahmoud Kitouni. Actinomycete Strains Isolated from Saline Soils: Plant-Growth-Promoting Traits and Inoculation Effects on Solanum lycopersicum. Sustainability. 2020; 12 (11):4617.

Chicago/Turabian Style

Rihab Djebaili; Marika Pellegrini; Maria Smati; Maddalena Del Gallo; Mahmoud Kitouni. 2020. "Actinomycete Strains Isolated from Saline Soils: Plant-Growth-Promoting Traits and Inoculation Effects on Solanum lycopersicum." Sustainability 12, no. 11: 4617.