Effects of 1-MCP and ethephon treatment on postharvest quality and physiological changes of tomatoes
[Objective]In order to accurately predict the harvest time of tomatoes and improve their stor-age quality,the effects of 1-methylcyclopropene(1-MCP)and ethephon(ETH)treatments on the posthar-vest quality and respiratory intensity of tomato fruits during storage were studied.[Method]Using distilled water treatment as a control(CK),1 mg/L 1-MCP fumigation treatment and 3 000 mg/L ETH soaking treatment were set up.After treatment,plastic bags were packed and stored at room temperature(25±2)℃,and relevant indicators were measured dynamically.[Result]Compared with CK,fruits treated with 1-MCP had a delay of 3 days in turning green to red;the fruit weight loss rate was significantly reduced by 30.52%;the fruit hardness,elasticity and chewiness were significantly improved by 36.01%,44.55%and 103.03%,respectively;the peak values of soluble solids,total soluble sugars and vitamin C content in fruits were delayed by 14 days,7 days and 7 days,respectively;at the end of storage,the content of titratable acid increased by 13.74%,with a significant difference;the content of chlorophyll a,chlorophyll b and total chlo-rophyll in fruits increased by 135.04%,13.26%and 71.26%,respectively,with a significant differ-ence.74%,with a significant difference;the content of chlorophyll a,chlorophyll b and total chlorophyll in fruits increased by 135.04%,13.26%and 71.26%,respectively,with a significant difference;the respira-tion intensity and ethylene release rate of fruits decreased significantly.At the end of storage,fruit weight loss rate increased by 38.32%and fruit hardness decreased by 41.09%,with significant differences;fruit elasticity and adhesion significantly decreased by 26.3%and 67.18%,respectively;the peak time of soluble sugar and vitamin C content was 7 days earlier than the control;fruit respiration intensity significantly in-creased and the peak of ethylene release rate appeared 7 days earlier.[Conclusion]Treatment with 1-MCP can delay the ripening and ageing of tomato fruit and improve its storage tolerance;treatment with ETH can accelerate the ripening of tomato fruit,make it ripe in the short term and can be used to improve the quality of early harvested fruit.
万方数据
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