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Journal of Tea Science ›› 2019, Vol. 39 ›› Issue (3): 335-341.doi: 10.13305/j.cnki.jts.2019.03.011

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Effects of Exogenous Nitric Oxide on Physiological Characteristics of Tea Plants Under Cold Stress

WANG Yingzi1,2, LI Yinhua1,2, CHEN Jinhua1,2, LIU Zhonghua1,2, HUANG Jian'an1,2*   

  1. 1. Key Laboratory of Tea Science of Ministry of Education, Hunan Agricultural University, Changsha 410128, China; 2. National Research Center of Engineering & Technology for Utilization of Functional Ingredients from Botanicals, Hunan Agricultural University, Changsha 410128, China
  • Received:2018-09-29 Revised:2018-12-02 Online:2019-06-15 Published:2019-06-15

Abstract: In order to investigate the alleviation effect of exogenous nitric oxide (NO) donor sodium nitroprusside (SNP) on tea rooted cuttings under cold stress, artificial climate chamber was used to simulate cold stress on tea rooted cuttings. The effects of SNP on membrane lipid peroxidation, osmotic adjustment substance and antioxidant activity of biennial ‘Bixiangzao’ rooted cuttings under cold stress were studied by foliar spray of SNP. The results show that suitable SNP concentration treatment could reduce the relative conductivity of tea leaves, inhibit the elevated malondialdehyde content, promote the accumulation of proline, soluble protein and sugar, and increase the superoxide dismutase, catalase activities, thereby alleviate the damage of cold stress on tea leaves. In addition, the optimal concentration of SNP was 200 μmol?L-1.

Key words: tea plant, low temperature stress, exogenous nitric oxide, sodium nitroprusside, physiological characteristics

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