Articles
PREHARVEST APPLICATIONS OF METHYL JASMONATE INTERFERE WITH PEACH FRUIT (PRUNUS PERSICA L. BATSCH) RIPENING AS REVEALED BY PHYSIOLOGICAL PARAMETERS
Article number
884_92
Pages
683 – 688
Language
English
Abstract
Effects of preharvest applications of methyl jasmonate (MJ) on ripening of Redhaven peaches were studied.
MJ (200 ppm) was sprayed two weeks before commercial harvest (100 DAFB), at the S3/S4 transition stage of peach fruit growth, on the whole canopy.
Fruit ripening was monitored by IAD (index of absorbance difference), a new non-destructive parameter that detects early and late physiological changes during fruit development.
IAD data were correlated with ethylene emission determined by packed-gas chromatography.
Fruits were harvested 11 and 14 days after treatment and, in both cases, treated fruits had higher mean values of IAD than control fruits (higher values mean a less mature fruit). Ethylene emission during shelf-life of climacteric (IAD <0.6) and non-climacteric fruits (IAD >0.9), was enhanced by the treatment.
This experiment shows that MJ treatment produced a delayed ripening as compared to control fruits; however, during shelf-life, treated fruit produced more ethylene than controls.
MJ (200 ppm) was sprayed two weeks before commercial harvest (100 DAFB), at the S3/S4 transition stage of peach fruit growth, on the whole canopy.
Fruit ripening was monitored by IAD (index of absorbance difference), a new non-destructive parameter that detects early and late physiological changes during fruit development.
IAD data were correlated with ethylene emission determined by packed-gas chromatography.
Fruits were harvested 11 and 14 days after treatment and, in both cases, treated fruits had higher mean values of IAD than control fruits (higher values mean a less mature fruit). Ethylene emission during shelf-life of climacteric (IAD <0.6) and non-climacteric fruits (IAD >0.9), was enhanced by the treatment.
This experiment shows that MJ treatment produced a delayed ripening as compared to control fruits; however, during shelf-life, treated fruit produced more ethylene than controls.
Authors
A. Soto, V. Ziosi, G. Costa, P. Torrigiani
Keywords
ripening syndrome, index of absorbance difference (IDA), anthocyanin content, ethylene emission
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