Effects of Shading Nets on Reactive Oxygen Species Accumulation, Photosynthetic Changes, and Associated Physiochemical Attributes in Promoting Cold-Induced Damage in Camellia sinensis (L.) Kuntze
文献类型： 外文期刊
作者： Zaman, Shah 1 ; Shen, Jiazhi 1 ; Wang, Shuangshuang 1 ; Wang, Yu 1 ; Ding, Zhaotang 1 ; Song, Dapeng 3 ; Wang, Hui 3 ; Ding, Shibo 3 ; Pang, Xu 3 ; Wang, Mengqi 3 ;
作者机构： 1.Shandong Acad Agr Sci, Tea Res Inst, Jinan 250100, Peoples R China
2.Qingdao Agr Univ, Tea Res Inst, Qingdao 266109, Peoples R China
3.Rizhao Tea Res Inst, Rizhao 276800, Peoples R China
关键词： Camellia sinensis; shading nets; cold damage; antioxidant activities; physiochemical properties; logical traits; photosynthetic capacity
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 7 期
页码：
收录情况： SCI
摘要： Climate change and extreme weather affect tea growing. A competitive tea market needs quick, short-term solutions. This study evaluates the effects of various shade nets under mild and extreme cold stress on tea leaf physiology, photosynthetic alterations, antioxidant activities, and physiochemical characteristics. Tea plants were treated with SD0 (0% non-shading), SD1 (30% shading), SD2 (60% shading), and SD3 (75% shading). The 30%, 60%, and 75% shade nets shielded tea leaves from cold damage and reduced leaf injury during mild and extreme cold conditions compared with SD0% non-shading. Shading regulates photochemical capacity and efficiency and optimizes chlorophyll a and b, chlorophyll, and carotenoid contents. Moreover, carbon and nitrogen increased during mild cold and decreased in extreme cold conditions. Shading promoted antioxidant activity and physiochemical attributes. In fact, under 60% of shade, superoxide dismutase, peroxidase, catalase, and omega-3 alpha-linolenic acid were improved compared with SD0% non-shading during both mild and extreme cold conditions. From these findings, we hypothesized that the effect of different shades played an important role in the protection of tea leaves and alleviated the defense mechanism for "Zhong Cha 102" during exposure to a cold environment.
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