Roles of antioxidant capacity and energy metabolism in the maturity-dependent chilling tolerance of postharvest kiwifruit
文献类型： 外文期刊
作者： Wang, Feng 1 ; Yang, Qingzhen 1 ; Zhao, Qifeng 3 ; Zhang, Xiaoping 3 ;
作者机构： 1.Yuncheng Univ, Dept Life Sci, Yunchen 044000, Shanxi, Peoples R China
2.Jeonju Univ, Dept Environm Sci & Biotechnol, Jeonju 55069, South Korea
3.Shanxi Acad Agr Sci, Res Inst Pomol, Taigu 030815, Shanxi, Peoples R China
关键词： Kiwifruit; Maturity; Chilling injury; Antioxidant capacity; Energy metabolism
期刊名称：POSTHARVEST BIOLOGY AND TECHNOLOGY （ 2020影响因子：5.537； 五年影响因子：5.821 ）
ISSN： 0925-5214
年卷期： 2020 年 168 卷
收录情况： SCI
摘要： To investigate the effects of fruit maturity on chilling injury, antioxidative capacity, and energy metabolism, 'Hongyang' kiwifruit were harvested at three stages of maturity (I, II, and III), based on soluble solid content (4.5-5.5 %, 6.5-7.5 %, and 8.5-9.5 %, respectively). The fruit were cold-stored at 0 degrees C for 100 d and then subjected to various analyses. Among the three fruit stages, stage II and III fruit were less susceptible to chilling injury and exhibited a higher abundance of antioxidant enzymes (superoxide dismutase, catalase, ascorbate peroxidase, and glutathione reductase) and energy and metabolism-related enzymes (H+-adenosine tripho-sphatase, Ca2+-adenosine triphosphatase, cytochrome C oxidase, and succinic dehydrogenase). Moreover, we observed lower levels of super oxide anion, H2O2, malondialdehyde content, and relative membrane perme-ability, and higher levels of ATP and energy charge. These results indicated that the higher resistance of stage II and III 'Hongyang' kiwifruit against chilling injury could be correlated to higher antioxidant and energy metabolism-related enzyme activities, ATP levels, and energy charges. However, the stage III fruit decayed faster than stage II fruit. The results indicate that the postharvest life of 'Hongyang' kiwifruit can be maximized by harvesting and storing kiwifruit at a soluble solids content of 6.5-7.5 %.
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