当前位置: 首页 > 文章 > Exogenous melatonin delays yellowing in harvested broccoli by maintaining chloroplast integrity 园艺学报(英文版) 2024
Position: Home > Articles > Exogenous melatonin delays yellowing in harvested broccoli by maintaining chloroplast integrity Horticultural Plant Journal 2024

Exogenous melatonin delays yellowing in harvested broccoli by maintaining chloroplast integrity

作  者:
Ran Yan;Mariama Kebbeh;Yuan Cheng;Yue Wang;Yan Liu;Chen Huan;Xiaolin Zheng;Shuling She
关键词:
broccoli;mel;chloroplasts;chloroplast;yellowing;maintaine
摘  要:
Yellowing of broccoli is a crucial limiting factor for its commercial value and consumer acceptance during postharvest. In this study, the impacts of exogenous melatonin (MEL) on chlorophyll content and fluorescence, as well as ultrastructure and membrane lipid metabolism of chloroplasts in broccoli were investigated during postharvest. The results showed that MEL treatment (200 μmol · L-1) maintained the chlorophyll content, chloroplast autofluorescence and integral structure, and reduced the level ofserotonin in the chloroplasts in broccoli. Also, MEL treatment inhibited the membrane lipid peroxidation of chloroplasts, as indicated by low levels of superoxide anion (O2.-), hydrogen peroxide (H2O2) and malondialdehyde (MDA), and high levels of endogenous MEL. In addition, the stability and fluidity of chloroplast membranes were also better maintained in the treated broccoli via increasing the contents of phosphatidylglyceroland (PG), monogalactosyldiglyceride (MGDG), digalactosyldiglyceride (DGDG) and unsaturated fatty acids as well as decreasing saturated fatty acid content and the activities of lipoxygenase (LOX) and lipase (LPS). Thus, the application of MEL facilitated the maintenance of chloroplast integrity, thus contributing to yellowing postponement and the extension of the storage life of broccoli.

相似文章

计量
文章访问数: 7
HTML全文浏览量: 0
PDF下载量: 1

所属期刊

推荐期刊