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Effect of postarvest elicitors on ‘fuyu’ persimmon quality during cold storage
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Orientador(es)
Resumo(s)
To induce resveratrol synthesis and reduce skin browning in ‘Fuyu’ persimmons, fruit were treated directly
after harvest with the following elicitors: UV irradiation, ozone, phosphonate, or acibenzolar-S-methyl
and then kept for three months at -0.5 °C in air storage at around 95% relative humidity. Traces of transresveratrol
were detected in the skin of the persimmons at harvest, but after treatment and cold storage
this compound was not found. After shelf-life (storage plus 5 d at 20 °C), the soluble solids content (SSC),
reducing and non-reducing sugars and total polyphenols were not significantly influenced by any of the
elicitor treatments. Fruit treated with ozone showed a higher reducing sugar content but developed skin
damage, flesh browning and small internal cavities. These results were correlated with the skin colour. Fruit
treated with acibenzolar-S-methyl had the highest flesh firmness and total polyphenol content. However,
this treatment had a higher skin browning index after shelf-life.
Descrição
Proceedings of the International Conference “Environmentally friendly and safe
technologies for quality of fruit and vegetables”, held in Universidade do Algarve, Faro,
Portugal, on January 14-16, 2009. This Conference was a join activity with COST Action 924.
Palavras-chave
Acibenzolar-S-methyl Irradiation Ozone Phosphonate UV