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Effects of Pre‐ and Postharvest Chitosan Treatments to Control Storage Grey Mold of Table Grapes
Author(s) -
Romanazzi G.,
Nigro F.,
Ippolito A.,
DiVenere D.,
Salerno M.
Publication year - 2002
Publication title -
journal of food science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.772
H-Index - 150
eISSN - 1750-3841
pISSN - 0022-1147
DOI - 10.1111/j.1365-2621.2002.tb08737.x
Subject(s) - postharvest , botrytis cinerea , chitosan , preharvest , horticulture , inoculation , table grape , mold , phenylalanine ammonia lyase , chemistry , cultivar , biology , botany , phenylalanine , biochemistry , amino acid
The effectiveness of pre‐ and postharvest treatments with chitosan (0.1, 0.5, and 1.0%) to control Botrytis cinerea on table grapes was investigated. In postharvest treatments, small bunches dipped in chitosan solutions and inoculated with the pathogen showed a reduction of incidence, severity, and nesting of grey mold, in comparison with the control. Single berries artificially wounded, treated with the polymer, and inoculated with B. cinerea showed a reduced percentage of infected berries and lesion dia. Higher chitosan concentrations demonstrated greater decay reduction. All preharvest treatments significantly reduced the incidence of grey mold, as compared to the control. Table grapes treated with 1.0% chitosan showed a significant increase of phenylalanine ammonia‐lyase (PAL) activity. Consequently, besides a direct activity against B. cinerea , chitosan produces other effects contributing to reduce decay.