Effects of high temperature stress on physiological characteristics of rice during heading and flowering period

被引：0
|
作者：
Li P. [1 ]
Cheng G. [1 ]
Zhang J. [2 ]
Li B. [3 ]
Xie X. [4 ]
Yang S. [4 ]
机构：
[1] Key Laboratory of Modern Agricultural Equipment and Technology, Jiangsu University, Zhenjiang
[2] Chinese Academy of Meteorological Sciences
[3] Institute of Agricultural Resource and Environment, Jiangsu Academy of Agricultural Sciences, Nanjing
[4] College of Applied Meteorology, Nanjing University of Information Science and Technology, Nanjing
来源：
Jiangsu Daxue Xuebao (Ziran Kexue Ban) / Journal of Jiangsu University (Natural Science Edition) | 2010年 / 31卷 / 02期
关键词：
Heading and flowering period; High temperature stress; Physiological characteristic; Rice;
D O I：
10.3969/j.issn.1671-7775.2010.02.001
中图分类号：
学科分类号：
摘要：
The effects of high temperature stress on the physiological and biochemical characteristics of pollen and flag leaves of rice during heading and flowering period in Yangdao 6 and Nanjing 43 were studied. The results show that under high temperature stress, pollen germination rate and pollen vitality decreased significantly, the contents of osmotic adjustable organic substances(proline, soluble sugar and soluble protein), chlorophyll and the activity of superoxide dismutase(SOD) decreased obviously, whereas malondialdehyde(MDA) content and the electrolyte leakage increased noticeably. The ascorbic acid(ASA) and glutathione (GSH) contents increased appreciably at early stage of high temperature stress, and then decreased rapidly. Under the same growth condition, the harmfulness of high temperature stress on Nanjing 43 was always less than Yangdao 6 during heading and flowering period. Higher chlorophyll content and proline, soluble sugar, soluble protein content, lower MDA content and electrolyte leakage in flag leaves of rice were the physiological basis of stress resistance in rice.
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页码：125 / 130
页数：5
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