Chitosan induces delayed grapevine defense mechanisms and protects grapevine against Botrytis cinerea

Abstract In the present study, a commercial chitosan soluble in acid solution and obtained from shrimp shell waste, with molecular weight of 173 kDa degree acetylation 17%, named as (173/17), was investigated. Chitosan is well-known biopolymer whose antimicrobial properties are highly influenced by weight, well preparation derivatization methods used. (173/17) applied on grapevine leaves before Botrytis cinerea inoculation to verify its effectiveness preventive treatment against fungal infection. The expression set defense marker genes, accumulation stilbene phytoalexins, Thanks fungistatic filmogenic properties, protected B. cinerea. Moreover, it induced response: three days after an induction jasmonic ethylene-mediated response, repression salicylic acid-mediated signaling, transient trans -resveratrol were registered. Our data indicate that when used application, able protect natural ecofriendly product for control demonstrated.