您好，欢迎访问北京市农林科学院 机构知识库！
北京市农林科学院机构知识库

全部

  • 全部
  • 标题
  • 学者
  • 机构
  • 关键词

Seed germination and biochemical responses of two Elytrigia elongata accessions exposed to abiotic stresses

文献类型： 外文期刊

作者： Tian, Xiaoxia 1 ; Mao, Peichun 1 ; Zheng, Mingli 1 ; Meng, Qingyi 1 ; Meng, Lin 1 ;

作者机构： 1.Beijing Acad Agr & Forestry Sci, Beijing Res & Dev Ctr Grass & Environm, Beijing 100097, Peoples R China

关键词： abiotic stresses; biochemical responses; bud seedling; Elytrigia elongata; seed germination

期刊名称：GRASSLAND SCIENCE （ 影响因子：0.867； 五年影响因子：1.077 ）

ISSN： 1744-6961

年卷期：

页码：

收录情况： SCI

摘要： Elytrigia elongata, a rhizomatous and sparse-type perennial herb of the Triticeae tribe, with stronger drought and salt tolerance, is an important wild genetic resource for wheat variety improvement. However, no precise information about seed germination and biochemical responses of this species to drought, salinity and mixed saline-alkaline stresses is available. Hence, this experiment was conducted to investigate the effects of three abiotic stresses on seed germination and physiological characteristics of two E. elongata accessions. The results showed that drought and mixed saline-alkaline stresses impair seed germination and bud seedling growth of E. elongata. However, seed germination and bud seedling growth were promoted by 50 mmol/L, but inhibited by 100-200 mmol/L salinity treatments. The malondialdehyde (MDA) content was increased and the activities of superoxide dismutase (SOD), catalase (CAT) and peroxidase (POD) in the bud seedlings were significantly increased (p <.05) with increasing osmotic stress from 0 to -0.4 MPa, and salinity and mixed saline-alkaline from 0 to 150 mmol/L, but reduced at -0.75 MPa osmotic stress and 200 mmol/L salinity and mixed saline-alkaline stresses. Under the same salinity and mixed saline-alkaline treatment, the activities of SOD and CAT of EE030 were higher than those of EE024 except in 200 mmol/L salinity treatment; however, the MDA content of EE030 was lower than that of EE024, except in 150 mmol/L salinity treatment. In conclusion, the results of this study demonstrated that E. elongata seeds are more tolerant to salinity stress than to drought and mixed saline-alkaline stresses, and EE030 seed are more tolerant to three abiotic stresses than are the seeds of EE024.

  • 相关文献
作者其他论文 更多>>
置顶
购物车
反馈

© 京ICP备09089781号-29 主办单位：北京市农林科学院

学术资源： 中国农业科学院 农业专业知识服务系统 农科联盟资源共建共享平台 中国农业科技文献与信息服务平台 中国农业期刊集成服务平台