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A circular concept involving use of faba bean hulls for production of oyster mushrooms (Pleurotus ostreatus (Jacq.) P. Kumm.) and the post-harvest residues for feed purposes was evaluated. Faba bean hulls are a waste remaining after the beans are dehulled to decrease the content of anti-nutritional factors and increase the food value of the beans. Faba bean hulls proved very suitable as substrate for production of oyster mushrooms, with biological efficiency of 109 ± 28%. The fruiting bodies produced were comparable to commercially sold mushrooms in terms of morphology, protein content, protein quality, and chemical composition. After mushroom harvest, 48.4 ± 0.6% of initial dry weight (dwt) of the substrate remained and showed significant changes in proximate composition, with an increase in protein concentration from 207.9 ± 8.6 to 346.6 ± 16.5 g kg−1 dwt and a significant increase in 14 of 16 amino acids analyzed, including methionine. Concentrations of the anti-nutritional compounds vicine and convicine were below the detection limit after mushroom harvest, while their initial concentration was 5.7 ± 0.1 and 1.4 ± 0.04 g kg−1 dwt, respectively. Tannin concentration was reduced by approximately 50%, to a final level of 9.0 ± 1.6 g kg−1 dwt. Comparison of the spent mushroom substrate with a commonly used feedstuff for pigs indicated potential for the spent substrate to be a valuable protein source in pig diets. This study demonstrates the potential for achieving complete circular use of agro waste and has implications for development of production systems well suited in the biobased society.
E. Ivarsson; M. Grudén; J. Södergren; M. Hultberg. Use of faba bean (Vicia faba L.) hulls as substrate for Pleurotus ostreatus – Potential for combined mushroom and feed production. Journal of Cleaner Production 2021, 313, 127969 .
AMA StyleE. Ivarsson, M. Grudén, J. Södergren, M. Hultberg. Use of faba bean (Vicia faba L.) hulls as substrate for Pleurotus ostreatus – Potential for combined mushroom and feed production. Journal of Cleaner Production. 2021; 313 ():127969.
Chicago/Turabian StyleE. Ivarsson; M. Grudén; J. Södergren; M. Hultberg. 2021. "Use of faba bean (Vicia faba L.) hulls as substrate for Pleurotus ostreatus – Potential for combined mushroom and feed production." Journal of Cleaner Production 313, no. : 127969.
Moving food production into the urban and peri-urban areas is one way of facilitating a closed-loop approach, integrating waste handling with food production in order to recirculate nutrients and at the same time reduce the use of mined and fossil resources in the production. Using anaerobic digestion as a way of converting urban wastes to an energy source (methane) and a nutrient-rich biodigestate with subsequent use as fertilizer for food production seems like a feasible approach. However, utilizing urban wastes in plant production systems implies some challenges, such as high salinity of the waste, imbalanced composition of nutrients, and abundance of less favorable forms of nitrogen. In a series of experiments, these problems were addressed. Vegetables (Pak Choi) were cultivated hydroponically in a controlled climate. Experiments included increased salinity, elevated levels of nitrite, and different concentrations of the biogas digestate-based nutrient solution, with mineral based solutions as controls. In general, the mineral controls yielded around 50% higher fresh biomass than the organic solutions. However, the quality of the produce with respect to content of secondary metabolites such as vitamins was enhanced when the plants were cultivated with organic nutrient solutions. Increasing the concentration of NaCl to 241 mg Cl L−1 did not negatively affect plant performance. Increasing the concentration of nitrite negatively affected plant growth, with reductions in biomass production by up to 50%. Given this well-functioning nitrification process that did not result in high nitrite concentrations, the use of anaerobic digestates seems feasible for hydroponic production of vegetables.
Karl-Johan Bergstrand; Håkan Asp; Malin Hultberg. Utilizing Anaerobic Digestates as Nutrient Solutions in Hydroponic Production Systems. Sustainability 2020, 12, 10076 .
AMA StyleKarl-Johan Bergstrand, Håkan Asp, Malin Hultberg. Utilizing Anaerobic Digestates as Nutrient Solutions in Hydroponic Production Systems. Sustainability. 2020; 12 (23):10076.
Chicago/Turabian StyleKarl-Johan Bergstrand; Håkan Asp; Malin Hultberg. 2020. "Utilizing Anaerobic Digestates as Nutrient Solutions in Hydroponic Production Systems." Sustainability 12, no. 23: 10076.
Efficient removal techniques are urgently needed to remove organic micropollutants (OMPs) from wastewater, in order to protect water resources. In this study, laccase activity of mushroom substrate colonized by Pleurotus ostreatus was evaluated as a novel wastewater treatment method for removal of OMPs, including diclofenac, bicalutamide, lamotrigine, and metformin at environmentally relevant concentrations. Laccase activity of the colonized mushroom substrate was found to be highest, 0.8 enzyme activity (U)/g mushroom substrate wet weight, immediately before initiation of fruiting body formation. The selected OMPs were treated for 5 min with suspensions of mushroom substrate with laccase activity of approximately 50 U/L. Removal of all OMPs was significant, with the highest removal for diclofenac of 90% compared with a control with uncolonized mushroom substrate. To our knowledge, direct use of colonized mushroom substrate in removing diclofenac from water has not been reported previously. Removal efficiency of bicalutamide, lamotrigine, and metformin was 43%, 73%, and 59%, respectively. This demonstrates potential for using mushroom substrate colonized by P. ostreatus for removal of OMPs from wastewater.
M. Hultberg; Lutz Ahrens; O. Golovko. Use of lignocellulosic substrate colonized by oyster mushroom (Pleurotus ostreatus) for removal of organic micropollutants from water. Journal of Environmental Management 2020, 272, 111087 .
AMA StyleM. Hultberg, Lutz Ahrens, O. Golovko. Use of lignocellulosic substrate colonized by oyster mushroom (Pleurotus ostreatus) for removal of organic micropollutants from water. Journal of Environmental Management. 2020; 272 ():111087.
Chicago/Turabian StyleM. Hultberg; Lutz Ahrens; O. Golovko. 2020. "Use of lignocellulosic substrate colonized by oyster mushroom (Pleurotus ostreatus) for removal of organic micropollutants from water." Journal of Environmental Management 272, no. : 111087.
As diets change in response to ethical, environmental, and health concerns surrounding meat consumption, fermentation has potential to improve the taste and nutritional qualities of plant-based foods. In this study, cauliflower, white beans, and a 50:50 cauliflower-white bean mixture were fermented using different strains of Lactobacillus plantarum. In all treatments containing cauliflower, the pH was reduced to 12 content of the cauliflower-white bean mixture was measured, and compared against that of an unfermented control. The riboflavin and folate content of the mixture increased significantly after fermentation. Relative to control samples, riboflavin increased by 76–113%, to 91.6 ± 0.6 μg/100 g fresh weight, and folate increased by 32–60%, to 58.8 ± 2.0 μg/100 g fresh weight. For one bacterial strain, L. plantarum 299, a significant 66% increase in vitamin B12 was observed, although the final amount (0.048 ± 0.013 μg/100 g fresh weight) was only a small fraction of recommended daily intake. Measurements of amino acid composition in the mixture revealed small increases in alanine, glycine, histidine, isoleucine, leucine, and valine in the fermented sample compared to the unfermented control.
H. O. Thompson; G. Önning; K. Holmgren; H. S. Strandler; M. Hultberg. Fermentation of Cauliflower and White Beans with Lactobacillus plantarum – Impact on Levels of Riboflavin, Folate, Vitamin B12, and Amino Acid Composition. Plant Foods for Human Nutrition 2020, 75, 236 -242.
AMA StyleH. O. Thompson, G. Önning, K. Holmgren, H. S. Strandler, M. Hultberg. Fermentation of Cauliflower and White Beans with Lactobacillus plantarum – Impact on Levels of Riboflavin, Folate, Vitamin B12, and Amino Acid Composition. Plant Foods for Human Nutrition. 2020; 75 (2):236-242.
Chicago/Turabian StyleH. O. Thompson; G. Önning; K. Holmgren; H. S. Strandler; M. Hultberg. 2020. "Fermentation of Cauliflower and White Beans with Lactobacillus plantarum – Impact on Levels of Riboflavin, Folate, Vitamin B12, and Amino Acid Composition." Plant Foods for Human Nutrition 75, no. 2: 236-242.
Microalgae co-cultured with certain filamentous fungi form biopellets. Biopellets can be used in microalgae harvesting and in water treatment. White-rot fungi producing laccase are of interest for water treatment. In suitable environmental conditions, certain white-rot fungi can form biopellets with microalgae.
M Hultberg; H Bodin. Evaluation of Fungal White-Rot Strains for Assisting in Algal Harvest in Wastewater. Plant-Microbes-Engineered Nano-particles (PM-ENPs) Nexus in Agro-Ecosystems 2019, 149 -151.
AMA StyleM Hultberg, H Bodin. Evaluation of Fungal White-Rot Strains for Assisting in Algal Harvest in Wastewater. Plant-Microbes-Engineered Nano-particles (PM-ENPs) Nexus in Agro-Ecosystems. 2019; ():149-151.
Chicago/Turabian StyleM Hultberg; H Bodin. 2019. "Evaluation of Fungal White-Rot Strains for Assisting in Algal Harvest in Wastewater." Plant-Microbes-Engineered Nano-particles (PM-ENPs) Nexus in Agro-Ecosystems , no. : 149-151.
Nutrient-rich liquid waste streams generated during the beer brewing were treated by submerged fungal growth. Among five filamentous fungal strains tested, Pleurotus ostreatus and Trichoderma harzianum were selected for treatment of run-off from spent grain and hot trub, respectively. In both waste streams, nitrogen was well removed by fungal treatment, with a maximum reduction of 91.5 ± 0.5% of total nitrogen in run-off from spent grain treated with P. ostreatus and 77.0 ± 3.1% in hot trub treated with T. harzianum. Removal of phosphorus was considerably lower, with maximum removal of total phosphorus of 30.8 ± 11.1% for the P. ostreatus treatment and 16.6 ± 7.8% for the T. harzianum treatment. Considering the high concentration of phosphorus in the waste sources (320–600 mg L−1), additional techniques for its removal are needed. In the P. ostreatus treatment, a total amount of 13.2 ± 2.2 g L−1 dwt of biomass with a protein concentration of 11.6 ± 2.1% was produced.
M. Hultberg; H. Bodin. Fungi-based treatment of real brewery waste streams and its effects on water quality. Bioprocess and Biosystems Engineering 2019, 42, 1317 -1324.
AMA StyleM. Hultberg, H. Bodin. Fungi-based treatment of real brewery waste streams and its effects on water quality. Bioprocess and Biosystems Engineering. 2019; 42 (8):1317-1324.
Chicago/Turabian StyleM. Hultberg; H. Bodin. 2019. "Fungi-based treatment of real brewery waste streams and its effects on water quality." Bioprocess and Biosystems Engineering 42, no. 8: 1317-1324.
Wetlands have been successfully implemented as water purification systems for removal of plant nutrients and can play a significant role in nutrient recycling, depending on use of the harvested biomass. In a constructed wetland in southern Sweden examined in this study, assimilation of plant nutrients in wetland biomass corresponded to 234 kg/ha nitrogen, 22.8 kg/ha phosphorus, and 158 kg/ha potassium in the study year (2016). The harvested biomass, composed exclusively of common reed, was evaluated as a substrate for production of oyster mushrooms, one of the most widely produced edible mushrooms in the world. The biological efficiency of the substrate was 138 ± 10%, corresponding to production of 1.4 kg mushrooms (fresh weight) based on 1 kg reed (dry weight). The fruiting bodies had high quality, with total protein concentration 18.3 ± 2.8% and very low levels of contaminating heavy metals. Thus, nutrient assimilation in wetland biomass not only decreases the risk of eutrophication in recipient waters, but can be utilized for direct production of high-quality food. The biomass remaining after mushroom production, composed of mycelium and partly degraded wetland biomass, has potential for use in ruminant feed, i.e., as roughage.
Malin Hultberg; Thomas Prade; Hristina Bodin; Aleksandar Vidakovic; Håkan Asp. Adding benefit to wetlands – Valorization of harvested common reed through mushroom production. Science of The Total Environment 2018, 637-638, 1395 -1399.
AMA StyleMalin Hultberg, Thomas Prade, Hristina Bodin, Aleksandar Vidakovic, Håkan Asp. Adding benefit to wetlands – Valorization of harvested common reed through mushroom production. Science of The Total Environment. 2018; 637-638 ():1395-1399.
Chicago/Turabian StyleMalin Hultberg; Thomas Prade; Hristina Bodin; Aleksandar Vidakovic; Håkan Asp. 2018. "Adding benefit to wetlands – Valorization of harvested common reed through mushroom production." Science of The Total Environment 637-638, no. : 1395-1399.
Recent research has demonstrated the potential of using filamentous fungi to form pellets with microalgae (biopellets), in order to facilitate harvesting of microalgae from water following algae-based treatment of wastewater. In parallel, there is a need to develop techniques for removing organic pollutants such as pesticides and pharmaceuticals from wastewater. In experiments using the microalga Chlorella vulgaris, the filamentous fungus Aspergillus niger and biopellets composed of these microorganisms, this study investigated whether fungal-assisted algal harvesting can also remove pesticides from contaminated water. A mixture of 38 pesticides was tested and the concentrations of 17 of these were found to be reduced significantly in the biopellet treatment, compared with the control. After harvesting, the concentration of total pesticides in the algal treatment did not differ significantly from that in the control. However, in the fungal treatment and biopellet treatment, the concentration was significantly lower (59.6 ± 2.0 µg/L and 56.1 ± 2.8 µg/L, respectively) than in the control (66.6 ± 1.0 µg/L). Thus fungal-assisted algal harvesting through biopellet formation can also provide scope for removing organic pollutants from wastewater, with removal mainly being performed by the fungus.
Malin Hultberg; Hristina Bodin. Effects of fungal-assisted algal harvesting through biopellet formation on pesticides in water. Biogeochemistry 2018, 29, 557 -565.
AMA StyleMalin Hultberg, Hristina Bodin. Effects of fungal-assisted algal harvesting through biopellet formation on pesticides in water. Biogeochemistry. 2018; 29 (6):557-565.
Chicago/Turabian StyleMalin Hultberg; Hristina Bodin. 2018. "Effects of fungal-assisted algal harvesting through biopellet formation on pesticides in water." Biogeochemistry 29, no. 6: 557-565.
Beatrix Alsanius; Anna Karin Rosberg; Malin Hultberg; Sammar Khalil; Victoria Jung; Chuanxue Hong; Gary W. Moorman; Walter Wohanka; Carmen Büttner. CHAPTER 28: Understanding and Utilizing Naturally Occurring Microbes Against Plant Pathogens in Irrigation Reservoirs. Biology, Detection, and Management of Plant Pathogens in Irrigation Water 2017, 347 -364.
AMA StyleBeatrix Alsanius, Anna Karin Rosberg, Malin Hultberg, Sammar Khalil, Victoria Jung, Chuanxue Hong, Gary W. Moorman, Walter Wohanka, Carmen Büttner. CHAPTER 28: Understanding and Utilizing Naturally Occurring Microbes Against Plant Pathogens in Irrigation Reservoirs. Biology, Detection, and Management of Plant Pathogens in Irrigation Water. 2017; ():347-364.
Chicago/Turabian StyleBeatrix Alsanius; Anna Karin Rosberg; Malin Hultberg; Sammar Khalil; Victoria Jung; Chuanxue Hong; Gary W. Moorman; Walter Wohanka; Carmen Büttner. 2017. "CHAPTER 28: Understanding and Utilizing Naturally Occurring Microbes Against Plant Pathogens in Irrigation Reservoirs." Biology, Detection, and Management of Plant Pathogens in Irrigation Water , no. : 347-364.
Malin Hultberg; Beatrix Alsanius; Chuanxue Hong; Gary W. Moorman; Walter Wohanka; Carmen Büttner. CHAPTER 23: Surfactants and Biosurfactants for Irrigation Water Treatment. Biology, Detection, and Management of Plant Pathogens in Irrigation Water 2017, 281 -288.
AMA StyleMalin Hultberg, Beatrix Alsanius, Chuanxue Hong, Gary W. Moorman, Walter Wohanka, Carmen Büttner. CHAPTER 23: Surfactants and Biosurfactants for Irrigation Water Treatment. Biology, Detection, and Management of Plant Pathogens in Irrigation Water. 2017; ():281-288.
Chicago/Turabian StyleMalin Hultberg; Beatrix Alsanius; Chuanxue Hong; Gary W. Moorman; Walter Wohanka; Carmen Büttner. 2017. "CHAPTER 23: Surfactants and Biosurfactants for Irrigation Water Treatment." Biology, Detection, and Management of Plant Pathogens in Irrigation Water , no. : 281-288.
The beer-brewing process produces high amounts of nutrient-rich wastewater, and the increasing number of microbreweries worldwide has created a need for innovative solutions to deal with this waste. In the present study, fungal biomass production and the removal of organic carbon, phosphorus and nitrogen from synthetic brewery wastewater were studied. Different filamentous fungi with a record of safe use were screened for growth, and Trametes versicolor, Pleurotus ostreatus and Trichoderma harzianum were selected for further work. The highest biomass production, 1.78 ± 0.31 g L−1 of dry weight, was observed when P. ostreatus was used for the treatment, while T. harzianum demonstrated the best capability for removing nutrients. The maximum reduction of chemical oxygen demand, 89% of the initial value, was observed with this species. In the removal of total nitrogen and phosphorus, no significant difference was observed between the species, while removal of ammonium varied between the strains. The maximum reduction of ammonium, 66.1% of the initial value, was also found in the T. harzianum treatment. It can be concluded that all treatments provided significant reductions in all water-quality parameters after 3 days of growth and that the utilisation of filamentous fungi to treat brewery wastewater, linked to a deliberate strategy to use the biomass produced, has future potential in a bio-based society.
M. Hultberg; H. Bodin. Fungi-based treatment of brewery wastewater—biomass production and nutrient reduction. Applied Microbiology and Biotechnology 2017, 101, 4791 -4798.
AMA StyleM. Hultberg, H. Bodin. Fungi-based treatment of brewery wastewater—biomass production and nutrient reduction. Applied Microbiology and Biotechnology. 2017; 101 (11):4791-4798.
Chicago/Turabian StyleM. Hultberg; H. Bodin. 2017. "Fungi-based treatment of brewery wastewater—biomass production and nutrient reduction." Applied Microbiology and Biotechnology 101, no. 11: 4791-4798.
The effluent from the biogas process was tested as a nutrient source during cultivation of the protein-rich and edible microalgae Spirulina (Arthrospira platensis) and compared with conventional Spirulina medium. Equal biomass production was observed until late exponential phase and no significant differences could be observed between the treatments in protein amount, amino acid composition, and total lipid concentration. The concentration of the pigment phycocyanin differed significantly between Spirulina medium and the effluent-based medium (63.3 ± 11.7 and 86.2 ± 1.9 mg g−1, respectively). Slightly higher concentrations of saturated fatty acids, mainly palmitic acid, were observed in the biomass produced in Spirulina medium than in that produced in the effluent-based medium. In the biomass produced in the effluent-based medium, the cadmium concentration was 0.07 ± 0.05 mg kg−1 of dry weight, whereas it was below the detection limit in the biomass produced in Spirulina medium. There is a need to identify new food and feed resources and a possible future scenario is to integrate Spirulina production into the biogas plant for protein production as it contains more than 60% of protein on dry weight basis. In that scenario, it is important to control heavy metal concentrations in the biogas slurry fed to Spirulina.
Malin Hultberg; Olle Lind; Göran Birgersson; Håkan Asp. Use of the effluent from biogas production for cultivation of Spirulina. Bioprocess and Biosystems Engineering 2016, 40, 625 -631.
AMA StyleMalin Hultberg, Olle Lind, Göran Birgersson, Håkan Asp. Use of the effluent from biogas production for cultivation of Spirulina. Bioprocess and Biosystems Engineering. 2016; 40 (4):625-631.
Chicago/Turabian StyleMalin Hultberg; Olle Lind; Göran Birgersson; Håkan Asp. 2016. "Use of the effluent from biogas production for cultivation of Spirulina." Bioprocess and Biosystems Engineering 40, no. 4: 625-631.
Removal of cadmium (Cd) present at low levels (1 µg L−1) in water was investigated using three different microorganism treatments: the microalga Chlorella vulgaris, the fungus Aspergillus niger, and for the first time biopellets composed of C. vulgaris and A. niger. After 5 days, all microorganism treatments resulted in significantly lower Cd concentrations compared with the control. Biopellets treatment resulted in significantly lower pH values than other microorganism treatments, indicating that the biopellets should be investigated further for their water treatment capacity, since pH is a factor affecting the fate of numerous pollutants in water. Use of biopellets as a method to simplify harvesting of microalgae from water is also suggested.
Hristina Bodin; Håkan Asp; Malin Hultberg. Effects of biopellets composed of microalgae and fungi on cadmium present at environmentally relevant levels in water. International Journal of Phytoremediation 2016, 19, 500 -504.
AMA StyleHristina Bodin, Håkan Asp, Malin Hultberg. Effects of biopellets composed of microalgae and fungi on cadmium present at environmentally relevant levels in water. International Journal of Phytoremediation. 2016; 19 (5):500-504.
Chicago/Turabian StyleHristina Bodin; Håkan Asp; Malin Hultberg. 2016. "Effects of biopellets composed of microalgae and fungi on cadmium present at environmentally relevant levels in water." International Journal of Phytoremediation 19, no. 5: 500-504.
Hristina Bodin; Atlasi Daneshvar; Meritxell Gros; Malin Hultberg. Effects of biopellets composed of microalgae and fungi on pharmaceuticals present at environmentally relevant levels in water. Ecological Engineering 2016, 91, 169 -172.
AMA StyleHristina Bodin, Atlasi Daneshvar, Meritxell Gros, Malin Hultberg. Effects of biopellets composed of microalgae and fungi on pharmaceuticals present at environmentally relevant levels in water. Ecological Engineering. 2016; 91 ():169-172.
Chicago/Turabian StyleHristina Bodin; Atlasi Daneshvar; Meritxell Gros; Malin Hultberg. 2016. "Effects of biopellets composed of microalgae and fungi on pharmaceuticals present at environmentally relevant levels in water." Ecological Engineering 91, no. : 169-172.
Highlights•The effluent from anaerobic treatment of wastewater is suitable for algal treatment.•Discharge limits were met after 3 days of microalgal growth.•No effect of the anaerobic treatment on microalgal lipid production was observed.•Combining these treatments creates a sustainable wastewater treatment strategy. AbstractNutrient removal from the effluent of an anaerobic moving bed biofilm reactor (AnMBBR) treated with microalgae was evaluated. Algal treatment was highly efficient in removal of nutrients and discharge limits were met after 3 days. Extending the cultivation time from 3 to 5 days resulted in a large increase in biomass, from 233.3 ± 49.3 to 530.0 ± 72.1 mg L−1, despite nutrients in the water being exhausted after 3 days (ammonium 0.04 mg L−1, orthophosphate <0.05 mg L−1). Biomass productivity, lipid content and quality did not differ in microalgal biomass produced in wastewater sampled before the AnMBBR. The longer cultivation time resulted in a slight increase in total lipid concentration and a significant decrease in linolenic acid concentration in all treatments. Differences were observed in chemical oxygen demand, which decreased after algal treatment in wastewater sampled before the AnMBBR whereas it increased after algal treatment in the effluent from the AnMBBR.
Malin Hultberg; Lars-Erik Olsson; Göran Birgersson; Susanne Gustafsson; Bertil Sievertsson. Microalgal growth in municipal wastewater treated in an anaerobic moving bed biofilm reactor. Bioresource Technology 2016, 207, 19 -23.
AMA StyleMalin Hultberg, Lars-Erik Olsson, Göran Birgersson, Susanne Gustafsson, Bertil Sievertsson. Microalgal growth in municipal wastewater treated in an anaerobic moving bed biofilm reactor. Bioresource Technology. 2016; 207 ():19-23.
Chicago/Turabian StyleMalin Hultberg; Lars-Erik Olsson; Göran Birgersson; Susanne Gustafsson; Bertil Sievertsson. 2016. "Microalgal growth in municipal wastewater treated in an anaerobic moving bed biofilm reactor." Bioresource Technology 207, no. : 19-23.
The effect of the microalgae Chlorella vulgaris on a wide range of different pesticides in water was studied. Treatments included short-term exposure (1 h) to living and dead microalgal biomass and long-term exposure (4 days) to actively growing microalgae. The initial pesticide concentration was 63.5 ± 3.9 µg L−1. There was no significant overall reduction of pesticides after short-term exposure. A significant reduction of the total amount of pesticides was achieved after the long-term exposure to growing microalgae (final concentration 29.7 ± 1.0 µg L−1) compared with the long-term control (37.0 ± 1.2 µg L−1). The concentrations of 10 pesticides out of 38 tested were significantly lowered in the long-term algal treatment. A high impact of abiotic factors such as sunlight and aeration for pesticide reduction was observed when the initial control (63.5 ± 3.9 µg L−1) and the long-term control (37.0 ± 1.2 µg L−1) were compared. The results suggest that water treatment using microalgae, natural inhabitants of polluted surface waters, could be further explored not only for removal of inorganic nutrients but also for removal of organic pollutants in water.
Malin Hultberg; Hristina Bodin; Embla Ardal; Håkan Asp. Effect of microalgal treatments on pesticides in water. Environmental Technology 2015, 37, 893 -898.
AMA StyleMalin Hultberg, Hristina Bodin, Embla Ardal, Håkan Asp. Effect of microalgal treatments on pesticides in water. Environmental Technology. 2015; 37 (7):893-898.
Chicago/Turabian StyleMalin Hultberg; Hristina Bodin; Embla Ardal; Håkan Asp. 2015. "Effect of microalgal treatments on pesticides in water." Environmental Technology 37, no. 7: 893-898.
Asymptomatic endophytic fungi are often regarded as potent biocontrol agents in plants, but the competitive interactions between endophytes and other microbes within the same host plant are poorly understood. We tested a hypothesis that as compared to asymptomatic endophytes, an aggressive pathogen inhabiting the same host is able to utilize carbon substrates more efficiently. Using phenotype microarray, we determined the carbon utilization profiles of the highly virulent Dutch elm disease (DED) pathogen Ophiostoma novo-ulmi, and four asymptomatic elm (Ulmus spp.) endophyte isolates that were selected based on their differential association to the DED-susceptibility pattern of the host elms. The competitive interactions between isolates were evaluated using a niche overlap index. In contrast to our hypothesis, the studied endophytes exhibited extensive niche overlap with the pathogen, suggesting that some endophyte strains might protect elms against DED-pathogen through competition for substrates and provide new tools for biocontrol of DED.
Kathrin Blumenstein; Benedicte R. Albrectsen; Juan A. Martín; Malin Hultberg; Thomas N. Sieber; Marjo Helander; Johanna Witzell. Nutritional niche overlap potentiates the use of endophytes in biocontrol of a tree disease. BioControl 2015, 60, 655 -667.
AMA StyleKathrin Blumenstein, Benedicte R. Albrectsen, Juan A. Martín, Malin Hultberg, Thomas N. Sieber, Marjo Helander, Johanna Witzell. Nutritional niche overlap potentiates the use of endophytes in biocontrol of a tree disease. BioControl. 2015; 60 (5):655-667.
Chicago/Turabian StyleKathrin Blumenstein; Benedicte R. Albrectsen; Juan A. Martín; Malin Hultberg; Thomas N. Sieber; Marjo Helander; Johanna Witzell. 2015. "Nutritional niche overlap potentiates the use of endophytes in biocontrol of a tree disease." BioControl 60, no. 5: 655-667.
Potato late blight caused by Phytophthora infestans is one of the most destructive plant diseases worldwide. Currently, its management mainly relies on the frequent use of synthetic chemicals, and there is a need to develop more sustainable strategies. Biosurfactants produced by fluorescent pseudomonads have been shown to rapidly, within 1 min, cause zoospore lyses. This study investigated if the biosurfactant-producing strain Pseudomonas koreensis 2.74 and its biosurfactants have the potential to induce resistance in potato to late blight. The experiments were performed with treatments of whole plants of the susceptible potato cultivar Bintje and the partially resistant cultivar Ovatio. A significant disease reduction and an induced secretion of proteins such as pathogenesis-related (PR) protein 1, within the leaf apoplast, were observed in the potato cultivar Ovatio after treatment with the biosurfactant at a concentration of 1 mg ml−1. No significant effects on disease development were observed after treatment with the bacterial suspension of Pseudomonas koreensis 2.74.
Therese Bengtsson; Anna Holefors; Erland Liljeroth; Malin Hultberg; Erik Andreasson. Biosurfactants Have the Potential to Induce Defence Against Phytophthora infestans in Potato. Potato Research 2015, 58, 83 -90.
AMA StyleTherese Bengtsson, Anna Holefors, Erland Liljeroth, Malin Hultberg, Erik Andreasson. Biosurfactants Have the Potential to Induce Defence Against Phytophthora infestans in Potato. Potato Research. 2015; 58 (1):83-90.
Chicago/Turabian StyleTherese Bengtsson; Anna Holefors; Erland Liljeroth; Malin Hultberg; Erik Andreasson. 2015. "Biosurfactants Have the Potential to Induce Defence Against Phytophthora infestans in Potato." Potato Research 58, no. 1: 83-90.
Formation of biofilm on surfaces is a common feature in aquatic environments. Major groups of inhabitants in conditions where light is present are photoautotrophic microorganisms, such as cyanobacteria and microalgae. This study examined the effect of light quality on growth and biofilm formation of the microalgal species Chlorella vulgaris. Dense biofilm formation and aggregated growth of cells were observed in treatments exposed to blue, purple and white light. Less dense biofilm formation and solitary growth of cells were observed in treatments exposed to red, yellow or green light. Microalgal biofilms are of high importance in many respects, not least from an economic perspective. One example is the intense efforts undertaken to control biofilm formation on technical surfaces such as ship hulls. The present study suggests that light quality plays a role in biofilm formation and that blue-light receptors may be involved.
Malin Hultberg; Håkan Asp; Salla Marttila; Karl-Johan Bergstrand; Susanne Gustafsson. Biofilm Formation by Chlorella vulgaris is Affected by Light Quality. Current Microbiology 2014, 69, 699 -702.
AMA StyleMalin Hultberg, Håkan Asp, Salla Marttila, Karl-Johan Bergstrand, Susanne Gustafsson. Biofilm Formation by Chlorella vulgaris is Affected by Light Quality. Current Microbiology. 2014; 69 (5):699-702.
Chicago/Turabian StyleMalin Hultberg; Håkan Asp; Salla Marttila; Karl-Johan Bergstrand; Susanne Gustafsson. 2014. "Biofilm Formation by Chlorella vulgaris is Affected by Light Quality." Current Microbiology 69, no. 5: 699-702.
A.K. Rosberg; N. Gruyer; M. Hultberg; W. Wohanka; B.W. Alsanius. Monitoring rhizosphere microbial communities in healthy and Pythium ultimum inoculated tomato plants in soilless growing systems. Scientia Horticulturae 2014, 173, 106 -113.
AMA StyleA.K. Rosberg, N. Gruyer, M. Hultberg, W. Wohanka, B.W. Alsanius. Monitoring rhizosphere microbial communities in healthy and Pythium ultimum inoculated tomato plants in soilless growing systems. Scientia Horticulturae. 2014; 173 ():106-113.
Chicago/Turabian StyleA.K. Rosberg; N. Gruyer; M. Hultberg; W. Wohanka; B.W. Alsanius. 2014. "Monitoring rhizosphere microbial communities in healthy and Pythium ultimum inoculated tomato plants in soilless growing systems." Scientia Horticulturae 173, no. : 106-113.