20 research outputs found
SUPPRESSIVE ACTIVITY OF ORGANIC AMENDMENTS ENRICHED WITH MICROBIAL ANTAGONISTS AGAINST FUSARIOSIS OF TOMATO AND CUCURBIT PLANTS
Role of new bacterial surfactins in the antifungal interaction between Bacillus amyloliquefaciens and Fusarium oxysporum
Characterization of microbial antagonists for improving suppressive activity of organic amendments against soil-borne plant diseases
Bioaugmenting compost microbial community with selected bacteria to enhance beneficial effects on plant growth and health
Combined treatments based on biocontrol yeasts and agrochemicals or GRAS compounds to control postharvest decays of different fruit
A microbial consortium in the rhizosphere as a new biocontrol approach against fusarium decline of chickpea
Suppressive biomasses and antagonist bacteria for an eco-compatible control of Verticillium dahliae on nursery-grown olive plants
Antifungal Cyclic Lipopeptides from Bacillus amyloliquefaciens 2 Strain BO5A
ABSTRACT: A bioassay-guided fractionation of Bacillus
amyloliquefaciens strain BO5A afforded the isolation of two
new cyclic lipopeptides (1 and 2) as the major lipid con-
stituents (>60%) of the CHCl3−MeOH (2:1) extract. The
chemical structures of the isolated metabolites were elucidated
12 by spectroscopic methods, including 1D and 2D NMR
13 spectroscopy, mass spectrometry (MS), secondary ion mass
spectrometry (MS1, MS2), and chemical degradation. The
compounds are members of the surfactins family and are based
on a heptapeptide chain composed by Glu-Val-Leu-Val-Asp-
Leu-Leu. Its N-terminal end is N-acylated by an (R)-3-hydroxy
fatty acid with linear alkyl chains of 16:0 and 15:0 (1 and 2, respectively). The 3-hydroxyl group closes a 25-membered lactone
ring with the carboxylic group of the C-terminal amino acid. The isolated compounds were tested for their inhibitory activity
against five pathogenic fungi: Fusarium oxysporum, Trichoderma harzianum, Aspergillus niger, Botrytis cinerea, and Penicillium
italicum. Compound 2 displayed activity against all tested pathogens