文献类型： 外文期刊
作者： Feng, Yingna 1 ; Feng, Cui 3 ; Wang, Yuanhua 1 ; Gao, Shuai 1 ; Sun, Pengpeng 1 ; Yan, Zhiming 1 ; Su, Xiaojun 4 ; Sun, Ying 1 ; Zhu, Qianqian 1 ;
作者机构： 1.Jiangsu Vocat Coll Agr & Forestry, Dept Agron & Hort, Jurong 212400, Peoples R China
2.Engn & Tech Ctr Modern Hort, Jurong 212400, Peoples R China
3.Jiangsu Acad Agr Sci, Taizhou Inst Agr Sci, Taizhou 225300, Peoples R China
4.Jiangsu Acad Agr Sci, Nanjing 210014, Peoples R China
关键词： luffa; calcium chloride; fresh-cut browning; gene expression; ultrastructure; lipid peroxidation
期刊名称：HORTICULTURAE （ 影响因子：2.923； 五年影响因子：3.582 ）
ISSN：
年卷期： 2022 年 8 卷 6 期
页码：
收录情况： SCI
摘要： Enzymatic browning is a major issue that reduces the commercial value of Luffa cylindrica during storage, processing, and transportation. Our results showed that 1% CaCl2 treatment was optimal for reducing the surface browning of fresh-cut luffa. After storage at 25 degrees C for four days, the treated luffa had a significantly higher total phenolic (TP) content than the untreated luffa. At the end of the storage period, the calcium treatment showed low malondialdehyde (MDA) and hydrogen peroxide (H2O2) accumulation in the luffa. The treated luffa maintained higher superoxide dismutase (SOD), catalase (CAT), and phenylalanine ammonia lyase (PAL) activities and lower polyphenol oxidase (PPO) activity as compared to the untreated luffa. Furthermore, the genes regulating SOD (e.g., SOD1, SOD2, and SOD3), CAT (e.g., LcCAT1 and CAT2), and PAL (e.g., PAL1 and PAL2) in calcium-treated luffa were upregulated to varying degrees, suggesting that Ca2+ inhibited the browning of fresh-cut tissue by regulating the activities of those enzymes. Ultrastructure images showed that the treated luffa could maintain the relative integrity of the cell membrane and organelles. Therefore, Ca2+ might act as a second messenger to reduce ROS oxidative damage and maintain the cell membrane integrity. This study provides new insights into the breeding of new luffa varieties that are resistant to browning and post-harvest treatments to reduce the browning of luffa tissue.
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