Physiological responses of weedy rice to cold stress were investigated with weedy rice WR0345 and WR0326 as materials and Lijiangxintuanheigu as control. The fluctuations of physiological indexes of leaves and roots of weedy rice and cultivated rice at 5 ℃ in an artificial climate chamber were investigated. The physiological indexes of leaves of weedy rice and cultivated rice followed a similar trend except the contents of chlorophyll and carotenoids under cold stress. The change of thiobarbituric acid reactive substances(TBARS) and proline contents of weedy rice differed from cultivated rice, but it is otherwise for the change of electrolyte leakage and soluble sugar content in roots. Photosynthetic system in weedy rice WR0345 and Lijiangxintuanheigu was less damaged under chilling stress. Due to less injury and membrane lipid peroxidation, the cell membrane of weedy rice WR03 45 remained intact. The soluble sugar and proline contents of WR0345 were higher than those of Lijiangxintuanheigu under chilling stress. It indicated that weedy rice WR0345 was less injured under cold stress because of higher cold tolerance at the seedling stage .
MIAO Wei, WANG Guojiao, MA Dianrong*, WANG Jiayu， XU Zhengjin， CHEN Wenfu*
. Physiological Responses of Weedy Rice to Cold Stress at Seedling Stage in Liaoning Province， China [J]. Chinese Journal OF Rice Science, 2011
, 25(6)
: 639
-644
.
DOI: 10.3969/j.issn.10017216.2011.06.011
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