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Exogenous Ethylene Promotes Peel Color Transformation by Regulating the Degradation of Chlorophyll and Synthesis of Anthocyanin in Postharvest Mango Fruit

文献类型： 外文期刊

作者： Chen, Mingmin 1 ; Gu, Hui 3 ; Wang, Lirong 1 ; Shao, Yuanzhi 4 ; Li, Rui 1 ; Li, Wen 1 ;

作者机构： 1.Hainan Univ, Sch Hort, Haikou, Peoples R China

2.Hainan Univ, Key Lab Qual Regulat Trop Hort Crops Hainan Prov, Haikou, Peoples R China

3.Chinese Acad Trop Agr Sci, South Subtrop Crops Res Inst, Key Lab Hainan Prov Postharvest Physiol & Technol, Zhanjiang, Peoples R China

4.Hainan Univ, Sch Life Sci, Haikou, Peoples R China

关键词： ethephon; ripening; color transformation; correlation analysis; mango fruit

期刊名称：FRONTIERS IN NUTRITION （ 影响因子：6.59； 五年影响因子：6.873 ）

ISSN： 2296-861X

年卷期： 2022 年 9 卷

页码：

收录情况： SCI

摘要： Due to geographical location and climatic factors, postharvest storage and preservation of tropical fruits and vegetables are still facing huge challenges. Ethephon (ETH) is widely used as an ethylene donor to achieve the commercial color and flavor of climacteric fruits. However, the effect of ETH on fruit coloration was affected by many factors, such as fruit species, plant hormones, and storage conditions. In this study, the main mango variety "Guifei" in Hainan, China, was used to study the effects of different concentrations of ETH on fruit ripening and coloration during storage at 25 degrees C. Results showed that postharvest treatment with ETH (300, 500, and 900 mg center dot L-1) enhanced the activities of ACS and ACO, stimulated the release of endogenous ethylene, and accelerated fruit softening and color transformation. Compared with control, ETH treatment not only accelerated the breakdown of chlorophyll with higher activities of Chlase and MDCase but also induced the synthesis of carotenoid and anthocyanin with higher activities of PAL, CHI, DFR, and UFGT. Moreover, the changes in DFR and UFGT activities coincided with the increase in ETH concentration. Further, correlation analysis showed that the production of endogenous ethylene induced by ETH was significantly negatively correlated with firmness and chlorophyll content, whereas positively correlated with MDA content and anthocyanin content. This study suggests that the positive effect of ETH on "Guifei" mango color transformation is concentration-dependent within a certain concentration range. Anthocyanin is the main pigment for the red formation of "Guifei" mango, and DFR and UFGT may play critical roles in anthocyanin synthesis. ETH promoted the red coloration by promoting the release of endogenous ethylene and enhancing the activities of anthocyanin synthesis enzymes.

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