干旱对茶树幼苗发育过程中叶片生理生化的影响

茶叶科学 Pub Date : 2016-01-28 DOI:10.5376/JTSR.2016.06.0004

H. Upadhyaya, B. Dutta, S. Panda

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引用次数: 6

摘要

干旱是影响全球农业生产力的重要环境压力之一。本研究试图了解干旱对茶树不同无性系[TV-1、TV-20、TV-29和TV-30]生理生化的影响。干旱胁迫导致叶片相对含水量(RWC)降低，总叶绿素、类胡萝卜素、酚类物质浓度降低，脯氨酸浓度、脂质过氧化和多酚氧化酶活性升高。Na +和K +浓度降低引起叶片渗透胁迫，降低NR活性，最终降低叶片相对生长率。因此，干旱引起了一系列生理和生化变化，导致膜损伤和细胞功能丧失，最终导致茶叶等最重要的经济作物之一的生长减少。相比之下，TV-1通过保持较高的内源K +和脯氨酸含量以及叶片平衡的Na + /K +比，表现出更好的耐旱性。

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Drought Induced Physiological and Biochemical Changes in Leaves of Developing Seedlings of Tea [ Camellia sinensis (L) O Kuntze ] Cultivars

Drought is one of the important environmental stress affecting agricultural productivity around the world. In this study, an attempt has been made to understand drought induced biochemical alterations in different clones of Camellia sinensis [TV-1, TV-20, TV-29 and TV-30]. Drought stress induced decrease in total chlorophyll and carotenoid, phenolics concentration and increases in proline concentration, lipid peroxidation and polyphenols oxidase activity as a consequent of decrease in leaf relative water content (RWC). Decreased Na + and K + concentration caused osmotic stress in leaves decreasing NR activity, and ultimately reducing leaf relative growth rate. Thus, drought induced a range of physiological and biochemical alterations causing membrane damage and loss in cellular functions ultimately leading to reduction in growth of one of the most important economic crop like tea. In comparison, TV-1 showed better drought tolerance by maintaining higher endogenous K + and proline content and a balance Na + /K + ratio in leaves.

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来源期刊

茶叶科学

CiteScore

1.50

自引率

0.00%

发文量

2558

期刊介绍： The Journal of Tea Science was established in August 1964, approved by the Publicity Department, CCCPC. Its title was inscribed by Zhu De, the chairman of CCCPC. It was discontinued during the Cultural Revolution in 1966, and it was reissued in August 1984, approved by the State Scientific and Technological Commission.Academicians Chen Zongmao and Liu Zhonghuaof the Chinese Academy of Engineering served as the directors of the editorial board. The Journal of Tea Science is managed by the China Association for Science and Technology,sponsored by the China Tea Science Society and the Tea Research Institute of the Chinese Academy of Agricultural Sciences, and edited and published by the editorial office of the Journal of Tea Science. It is the only one of Chinese core journals in the field of tea science that is included in the core library of the Chinese Science Citation Database.Its Domestic Unified Serial Number is CN 33-1115/S, its International Standard Serial Number is ISSN 1000-369X and its International publication name code is CODEN-CHKEF4. At present, the Journal of Tea Science is a bimonthly publication, published in the middle of the month, with a book size of 16.