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Variability of Botrytis cinerea sensitivity to pyrrolnitrin, an antibiotic produced by biological control agents

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Variability of Botrytis cinerea sensitivity to pyrrolnitrin, an antibiotic produced by biological control agents

Content Provider	Springer Nature Link
Author	Ajouz, S. Walker, A. S. Fabre, F. Leroux, P. Nicot, P. C. Bardin, M.
Copyright Year	2010
Abstract	To establish a baseline sensitivity of Botrytis cinerea to pyrrolnitrin, an antibiotic produced by several biological control agents, 204 isolates were tested for sensitivity to pyrrolnitrin using a spore germination assay. The results showed that the isolates exhibited a wide range of sensitivity to pyrrolnitrin, with an 8.4-fold difference in EC50 (effective concentration to reduce spore germination by 50% comparing to the control) values between the least and the most sensitive isolates. The model-based clustering analysis indicates that the distribution of the EC50 values best fit a normal mixture model with three components and unequal variance. The less sensitive isolates were also multidrug resistant isolates. The efficacy of the pyrrolnitrin-producing Pseudomonas chlororaphis ChPhzS24 strain was tested in vitro and on tomato plants with isolates of B. cinerea having different EC50 values. Whatever the EC50 value of the isolates tested, no significant differences in sensitivity were observed towards this bacterium indicating an absence of resistance to this biological control agent within B. cinerea isolates and suggesting also that additional mechanisms of action are probably operated by this biological control agent.
Starting Page	353
Ending Page	363
Page Count	11
File Format	PDF
ISSN	13866141
Journal	BioControl
Volume Number	56
Issue Number	3
e-ISSN	15738248
Language	English
Publisher	Springer Netherlands
Publisher Date	2010-11-15
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Biological control Durability Baseline Multiple-drug-resistance Aggressiveness Agriculture Animal Biochemistry Plant Pathology Behavioural Sciences Animal Ecology Entomology
Content Type	Text
Resource Type	Article
Subject	Insect Science Agronomy and Crop Science

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