白叶1号的低温抗逆特性分析

Abstract

Abstract: The cold resistance was compared in two cultivars, the albino Baiye 1 (Camellia sinensis cv. Baiye 1) during albinism period and Longjing 43 (Camellia sinensis cv. Longjing 43) in Zhejiang province. The results showed that the net photosynthesis rate (Pn) and maximum carboxylation rate of Rubisco (Vc_max) in Baiye 1 during the albinism period were only 70%-80% of those in Longjing 43, but the activities of antioxidant enzymes APX and POD were both 30% higher than those in Longjing 43 under normal temperature. However, when they were treated under 2℃ condition for 24βh, various parameters related to photosynthesis were higher in Baiye 1 than Longjing 43. The activities of APX, POD and SOD were also 38.9%, 33.3% and 23.3% higher in Baiye 1. All the results indicated that the albinism phenomenon of Baiye 1 may lead to the improvement of antioxidant system, which would effectively reduce the H₂O₂accumulation in tea leaves and alleviate oxidative damage and photosynthetic inhibition during cold stress. Therefore, Baiye 1 during albinism period may have a better cold resistance than Longjing 43.

Key words: Baiye 1, albinism, cold stress, antioxidant enzymes

CLC Number:

S571.1
P423

ZHANG Lan, LI Xin, WEI Jipeng, LI Zhixin, SHEN Chen, YAN Peng, ZHANG Liping, HAN Wenyan. Analysis of the Cold Resistance of Baiye 1[J]. Journal of Tea Science, 2017, 37(1): 71-77.

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Analysis of the Cold Resistance of Baiye 1

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