期刊论文

中文

核农学报

1000-8551

2015

29

4

792-798

10.11869/j.issn.100-8551.2015.04.0792

国家现代农业产业技术体系水稻栽培岗位专家项目（CARS-01-34）；

本校为第一机构

为了探讨早稻幼苗叶片和根系对低温胁迫的生理响应,以低温胁迫(5℃,3d)下幼苗死苗率为评价指标筛选出的2个耐寒品种(株两优505、金优268)和2个冷敏感品种(中嘉早17、株两优819)为试验材料,研究低温胁迫(10℃,5d)下幼苗叶片和根系生理指标的变化。结果表明:1)低温处理期间,叶片SOD、CAT活性表现为先升后降的变化,在处理后1d达到最大值,根系表现为缓慢增加趋势,在处理后5d达到最大值。叶片MDA含量增加趋势相似,而根系中耐寒品种MDA含量缓慢增加,冷敏感品种则急剧增加。叶片和根系的可溶性蛋白含量变化不同,其中叶片为先增后降,根系则先降后增。2)常温恢复期间,耐寒品种叶片SOD、CAT活性可恢复到处...

To explore the physiological responses of seedling leaf and root in early rice to low temperature stress,2varieties（ Zhuliangyou505,Jinyou268） with cold tolerance and 2 varieties（ Zhongjiazao17,Zhuliangyou819） with cold sensitivity were taken as tested materials to evaluate the variation of the physiological index under the low temperature（ 10℃,5d） condition,of which 4 varieties were selected according to their seedling dead percentage at the stress of low temperature（ 5 ℃,3 d）. Results show that： 1） During the period of low tempera...