中国北方杂草稻幼苗对干旱胁迫的生理响应  

Physiological responses of weedy rice to drought stress at seedling stage

作　　者：丁国华[1] 马殿荣[1] 刘晓亮[1] 孔德秀[1] 高齐[1] 杨光[1] 唐亮[1] 高明超[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,辽宁沈阳110161

出　　处：《干旱地区农业研究》2013年第6期127-133,共7页Agricultural Research in the Arid Areas

基　　金：公益性行业(农业)科研专项(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：以杂草稻heb07-2、wr04-6及巴西陆稻IAPAR9为研究材料,采用人工气候箱培养幼苗,利用20%聚乙二醇6000(PEG-6000)模拟干旱条件,研究了杂草稻及巴西陆稻幼苗叶片和根系生理特性标的变化。结果表明:干旱胁迫下,杂草稻heb07-2幼苗的叶片与根系具有较高的超氧化物歧化酶(SOD)、过氧化氢酶(CAT)、抗坏血酸过氧化物酶(APX)活力;杂草稻heb07-2的可溶性糖含量、可溶性蛋白含量高于其它材料。杂草稻heb07-2细胞膜系统保持完整,膜质过氧化程度小于其它材料,表明干旱胁迫对杂草稻heb07-2伤害较小,具有较强苗期抗旱性。Physiological responses of weedy rice and upland rice to drought stress were investigated using weedy rice （heb07-2 and WR04-6）and upland rice （IAPAR9）.Changes in physiological parameters of leaves and roots of weedy rice and upland rice at 20%polyethylene glycol 6000（PEG-6000）in an artificial climate chamber were investi-gated .The results showed that the physiological indexes of leaves and root of weedy rice and upland rice exhibited a dif-ferent trend except for peroxidase（POD）and proline .The weedy rice heb07-2 leaves and roots had higher activities of superoxide dismutase（SOD）,catalase（CAT）,ascorbate peroxidase（APX）under drought stress .Due to less injury and membrane lipid peroxidation,the cell of membrane of weedy rice heb07-2 remained intact .The soluble sugar and solu-ble protein contents of heb07-2 were higher than those of IAPAR9 and WR04-6 under drought stress .It indicated that weedy rice heb07-2 was less sensitive to drought at seedling stage .

关 键 词：杂草稻 干旱胁迫 苗期 生理响应 

分 类 号：S511.034[农业科学—作物学]