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Effect of Low Temperature Stress on the Leaves Photosynthesis and Autioxidant Enzyme Activities of Four Species Greenhouse Crops in Northeast of China(PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2015年10
Page:
15-23
Research Field:
Publishing date:

Info

Title:
Effect of Low Temperature Stress on the Leaves Photosynthesis and Autioxidant Enzyme Activities of Four Species Greenhouse Crops in Northeast of China
Author(s):
ZHANG Xi-he1; YANG Zai-qiang1; CHEN Yan-qiu2; WANG Xue-lin1
(1.Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters，Nanjing University of Information Science and Technology,Nanjing,Jiangsu 210044；2.Shenyang Central Meteorological Center，Shenyang，Liaoning 110016)
Keywords:
low temperature; eggplant; sweet pepper; cucumber; photosynthetic characteristics; antioxidase activity
PACS:
S 626
DOI:
10.11937/bfyy.201510004
Abstract:
Eggplant‘Heixuanfeng Generation 1’，tomato‘Liangfen No.2’，sweet pepper‘Kadi’and cucumber‘Bilu’were selected as testing materials，the effect of low temperature on the physiological characteristics of the 4 greenhouse crops in Northeast of China were studied.From September to December in 2013，the dynamic temperature-fall period of cold wave was simulated at the phytotron of Nanjing University of Information Science and Technology.Four low-temperature treatment processes were designed，with respectively the lowest temperature of 2℃,1℃，0℃ and -1℃.Systematic study was conducted on the effect of dynamic low-temperature stress on the photosynthesis characteristics and autioxidant enzyme activities of the 4 crops.The results showed that apparently dynamic low-temperature stress restrained the photosynthetic rate of the leaves of the 4 greenhouse crops；the lower the lowest temperature became，the longer the time used for treatment lasted and the faster the photosynthetic rate of the leaf fell；when the lowest temperature of the cucumber and tomato came to 0℃ and -1℃，and the sweet pepper came to 1℃，the maximum photosynthetic rate of the leaf began to drop to a negative；Fv/Fm fell to below 0.4，unable to restore to the controlled level.In different treatment process，the activities of SOD，POD，CAT of the 4 greenhouse crops uniformly rose at first，and then fell.And the content of MDA changed opposite to protective enzyme.As for the content of MDA，sweet pepper>eggplant>cucumber>tomato.The study showed that when the lowest temperature for eggplant and sweet pepper came to 1℃，and that for cucumber and tomato respectively came to 0℃ and -1℃，the activity of leaf photosystem was irreversibly harmed.Performance in cold resistance of the 4 greenhouse crops was shown，in descending order，as follows：tomato>cucumber>eggplant>sweet pepper.

References:


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Last Update: 2015-08-05