Biological control of bacterial plant diseases with Lactobacillus plantarum strains selected for their broad ‐spectrum activity

The use of lactic acid bacteria bacteria to control multiple pathogens that affect different crops was studied, namely,Pseudomonas syringae pv.actinidiae in kiwifruit,Xanthomonas arboricola pv.pruni inPrunus andXanthomonas fragariae in strawberry. A screening procedure based onin vitro and inplanta assays of the three bacterial pathogens was successful in selectingLactobacillus plantarum PM411 and TC92 strains as biological control agents with broad ‐spectrum activity. The use of lactic acid bacteria (LAB) to control multiple pathogens that affect different crops was studied, namely,Pseudomonas syringae pv.actinidiae in kiwifruit,Xanthomonas arboricola pv.pruni inPrunus andXanthomonas fragariae in strawberry. A screening procedure based on in vitro andin planta assays of the three bacterial pathogens was successful in selecting potential LAB strains as biological control agents. The antagonistic activity of 55 strains was first tested in vitro and the strainsLactobacillus plantarum CC100, PM411 and TC92, andLeuconostoc mesenteroides CM160 and CM209 were selected because of their broad ‐spectrum activity. The biocontrol efficacy of the selected strains was assessed using a multiple‐pathosystem approach in greenhouse conditions.L. plantarum PM411 and TC92 prevented all three pathogens from infecting their corresponding plant hosts. In addition, the biocontrol performance of PM411 and TC92 was comparable to the reference products (Bacillus amyloliquefaciens D747,Bacillus s...

Source: Annals of Applied Biology - November 26, 2018 Category: Biology Authors: N úria Daranas, Gemma Roselló, Jordi Cabrefiga, Irene Donati, Jesús Francés, Esther Badosa, Francesco Spinelli, Emilio Montesinos, Anna Bonaterra Tags: RESEARCH ARTICLE Source Type: research