聚乙二醇模拟干旱胁迫对杂草稻发芽特性的影响  

Weedy Rice Response to Drought Stress at Germination and Seeding Growth Stage

作　　者：丁国华[1] 马殿荣[1] 杨光[1] 高齐[1] 赵明辉[1] 徐正进[1] 陈温福[1] 

机构地区：[1]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/北方超级粳稻育种教育部重点实验室,沈阳110161

出　　处：《沈阳农业大学学报》2013年第6期721-726,共6页Journal of Shenyang Agricultural University

基　　金：公益性行业(农业)科研研究生专项项目(201203026);辽宁省自然科学基金项目(20102192);现代农业产业技术体系建设专项资金(CARS-01-13)

摘　　要：采用聚乙二醇（PEG）模拟干旱胁迫，研究杂草稻在发芽期对干旱胁迫的反应。结果表明：杂草稻与栽培稻经15％聚乙二醇处理后发芽期延迟，发芽率虽有差异但不显著；干旱胁迫条件下，杂草稻茎长、根长、根数、茎干重、根干重、根冠比均降低；杂草稻茎长胁迫指数为0．29～0．71、根长胁迫指数为0．17～0．81、茎干重胁迫指数为0.31～0．83、根干重胁迫指数为0．16～0．97、根数胁迫指数为0．23～1．13，均高于栽培稻材料，在正常条件下杂草稻与栽培稻生长量无显著差异。In order to study the effect of drought stress on germination and early seedling growth of weedy rice, polyethylene glycol-6000 （PEG-6000） was used to simulate drought condition. The results showed that 15% PEG-6000 delayed germination rate, and decreased germination percentage slightly. Shoot length, the longest root length, shoot dry weight, root dry weight, root to shoot ratio all declined. The plant height stress index （0.29-0.71）, root length stress index （0.23-0.13） of the weedy rice were higher than those of cultivated rice, and there were no significant differences in biomass between weedy rice and cultivated rice under normal condition.

关 键 词：聚乙二醇 杂草稻 干旱胁迫 发芽 

分 类 号：S511[农业科学—作物学]