NaCl胁迫下羊草幼苗的生理反应及外源ABA的缓解效应  

Physiological response of Aneurolepidium chinense seedlings on NaCl stress and mitigation effect of external ABA on it

作　　者：王萍[1] 殷立娟[1] 李建东[1] 

机构地区：[1]东北师范大学国家草地生态工程实验室

出　　处：《应用生态学报》1996年第2期155-158,共4页Chinese Journal of Applied Ecology

基　　金：国家自然科学基金

摘　　要：对ＮａＣｌ胁迫下羊草（Ａｎｅｕｒｏｌｅｐｉｄｉｕｍｃｈｉｎｅｎｓｅ）的生长、生理和代谢变化的研究表明，在Ｎａ＋胁迫下，羊草幼苗生长受抑，叶片细胞膜相对透性增大，体内脯氨酸累积增加，无机Ｎａ＋含量增多．叶绿素含量减少．外源ＡＢＡ处理可促进羊草对Ｋ＋吸收，抑制Ｎａ＋吸收，减轻Ｎａ＋毒害，增强膜稳定性、光合能力和渗透调节能力，并提高羊草生长代谢活性和叶绿素含量．Studies on the growth and metabolism of Aneurolepidium chinense seedlings show that under NaCl stress, their growth is inhibited, while the relative permeability of leaf cell membrane is increased, which induces the accumulation of inorganic Na+ in leaf. The leaf content of proline is increased, but that of chlorophyll is decreased. External ABA can promote the uptake of K- by A. chinense ,but inhibit the uptake of Na+, weaken the toxicity of Na-, enhance the stability of leaf cell membrane and the photosynthetic capacity and permeability regulation ability of leaf, and increase the activity of plant growth and metabolism and the content of chlorophyll.

关 键 词：羊草 氯化钠胁迫 幼苗 生理反应 脱落酸 

分 类 号：Q949.714.2[生物学—植物学]