辽宁省杂草稻幼苗对低温胁迫的生理响应

苗微 王国骄 马殿荣* 王嘉宇 徐正进 陈温福*

doi:10.3969/j.issn.10017216.2011.06.011

中国水稻科学 >

2011 , Vol. 25 >Issue 6: 639 - 644

DOI: https://doi.org/10.3969/j.issn.10017216.2011.06.011

研究报告

辽宁省杂草稻幼苗对低温胁迫的生理响应

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沈阳农业大学水稻研究所/农业部东北水稻生物学与遗传育种重点实验室/教育部与辽宁省共建北方粳稻遗传育种重点实验室，辽宁沈阳 110866；

收稿日期: 2011-01-05

修回日期: 2011-08-26

网络出版日期: 2011-11-10

基金资助

辽宁省自然科学基金资助项目（20102192）；水稻生物学国家重点实验室开放课题（090404）；现代农业产业技术体系建设专项；沈阳农业大学国家自然科学基金启动基金。

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Physiological Responses of Weedy Rice to Cold Stress at Seedling Stage in Liaoning Province， China

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Rice Research Institute, Shenyang Agricultural University/Key Laboratory of Northern Rice Biology, Genetics and Breeding, Ministry of Agriculture/Key Laboratory of Northern Japonica Rice Breeding, Ministry of Education, Shenyang 110866, China;

Received date: 2011-01-05

Revised date: 2011-08-26

Online published: 2011-11-10

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摘要

以杂草稻WR0345和WR0326为研究材料，以栽培稻丽江新团黑谷为对照，采用人工气候箱培养，研究了低温胁迫（5 ℃）对杂草稻幼苗期叶片和根系生理指标的影响。结果表明，除叶绿素和类胡萝卜素含量外，杂草稻叶片各生理指标的变化规律与对照相似; 杂草稻根系硫代巴比妥酸反应产物（TBARS）和脯氨酸的变化规律与对照不同，外渗电导率和可溶性糖含量的变化规律与对照相似。低温对WR0345和丽江新团黑谷的光合系统损伤较小；低温胁迫后，WR0345细胞膜系统保持完整，膜脂过氧化程度小于其他材料；WR0345可溶性糖含量和脯氨酸含量均高于对照品种。5 ℃低温对杂草稻WR0345伤害较小，表明WR0345具有较强的苗期耐冷性。

关键词： 低温胁迫; 杂草稻; 苗期; 生理响应

本文引用格式

苗微王国骄马殿荣* 王嘉宇徐正进陈温福* . 辽宁省杂草稻幼苗对低温胁迫的生理响应[J]. 中国水稻科学, 2011 , 25(6) : 639 -644 . DOI: 10.3969/j.issn.10017216.2011.06.011

Abstract

Physiological responses of weedy rice to cold stress were investigated with weedy rice WR0345 and WR0326 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 WR0345 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 WR0345 were higher than those of Lijiangxintuanheigu under chilling stress. It indicated that weedy rice WR0345 was less injured under cold stress because of higher cold tolerance at the seedling stage .

Key words： cold stress; weedy rice; seedling stage; physiological response

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