文献类型： 外文期刊
作者： Wang, Li 1 ; Zhang, Xue 2 ; Chen, Weili 1 ; Xiao, Tujian 2 ; Zhao, Xiaozhen 2 ; Ma, Yuhua 2 ; Huang, Xuming 1 ;
作者机构： 1.South China Agr Univ, Coll Hort, Guangzhou 510642, Guangdong, Peoples R China
2.Guizhou Acad Agr Sci, Inst Pomol Sci, Guiyang 550009, Guizhou, Peoples R China
关键词： antioxidant enzyme; chlorophyll; MDA; proline; ROS
期刊名称：NOTULAE BOTANICAE HORTI AGROBOTANICI CLUJ-NAPOCA （ 影响因子：1.444； 五年影响因子：1.363 ）
ISSN： 0255-965X
年卷期： 2019 年 47 卷 2 期
页码：
收录情况： SCI
摘要： Pitaya (Hylocereus undatus Britton & Rose) is widely cultivated in subtropical and tropical regions. Pitaya is cold-sensitive; most cultivars are injured during chilling winter periods, especially in subtropical regions. In this study, the effects of shading on the cold tolerance in pitaya plant were investigated. Pitaya plants were grown under full sunlight (control) or a shading net with a light blocking rate of about 60%. Morphological and physiological performance of the overwintering pitaya plants were compared between the control and the shaded treatment. The results showed that shading treatment markedly reduced the chilling induced tissue necrosis. Contents of chlorophyll a, chlorophyll b, and total chlorophylls (chlorophyll a+b), the chlorophyll a/b ratio, Fm and Fv/Fm were all higher in shading treatment than those in the control. Meanwhile, proline content and ascorbic acid peroxidase (APX) activity in the shading treatment were significantly increased, while malondialdehyde (MDA), the superoxide anion (O-2 center dot(-)) and hydrogen peroxide (H2O2) levels were significantly decreased by shading treatment. The results indicated that damage caused by chilling stress on pitaya was, at least partially, light-dependent; and in practical production, shading treatment can be used to reduce chilling injury in pitaya.
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