巴东木莲幼苗对干旱胁迫的生长和生理响应  

Growth and Physiological Response of Manglietia patungensis Seedlings to Drought Stress

作　　者：王毅敏 谢春培 王玉兵 李薇 高晗 雷华 Wang Yimin;Xie Chunpei;Wang Yubing;Li Wei;Gao Han;Lei Hua(Biotechnology Research Center of China Three Gorges University, Yichang 443001;Management Office of Three Gorges Botanical Garden ,Yichang 443111)

机构地区：[1]三峡大学生物技术研究中心,宜昌443001 [2]三峡植物园管理处,宜昌443111

出　　处：《湖北林业科技》2020年第2期6-10,共5页Hubei Forestry Science and Technology

基　　金：湖北省技术创新专项资助(NO:2018ACA132);国家自然基金资助(NO:31770654)。

摘　　要：采用盆栽人工模拟控水法干旱胁迫,探讨巴东木莲Manglietia patungensis幼苗的生长和生理特性对干旱胁迫的响应情况,随着干旱胁迫的加剧,巴东木莲幼苗苗高、地径和生物量逐渐降低,可溶性蛋白含量逐渐升高,叶绿素含量在对照处理略高,在轻度胁迫处理和中度胁迫处理明显降低。随着胁迫时间的延长,巴东木莲幼苗叶片组织相对含水量降低,丙二醛含量先升后降再升,脯氨酸含量逐渐升高,保护酶SOD活性均呈先增加而后降低的变化趋势。研究表明:在不同程度的干旱胁迫条件下,巴东木莲幼苗的生长受到一定程度的抑制,但能够通过调节自身的保护酶系统活性和渗透调节物质含量来减轻干旱伤害,维持植物体的正常生理代谢功能,从而表现出一定的抗旱耐旱潜力。Drought stress by artificial simulated water control in potted plants,To investigate the response of the growth and physiological characteristics of Manglietia patungensis seedlings to drought stress.With the increase of drought stress,the seedling height,ground diameter and biomass of M.patungensis seedlings decreased gradually,the soluble protein content increased gradually,the chlorophyll content was slightly higher in the control treatment,and the treatment under mild stress and moderate stress was significantly reduced.With the prolongation of stress time,the relative water content of the leaves of M.patungensis seedlings decreased,the content of malondialdehyde increased first,then decreased,the content of proline increased gradually,The protective enzyme SOD activity increased first and then decreased.The research shows that under different degrees of drought stress,the growth of M.patungensis seedlings is inhibited to a certain extent,but it can reduce the drought damage by regulating the activity of its protective enzyme system and the content of osmotic regulatory substances.Maintain the normal physiological metabolic function of the plant body,thus showing a certain drought tolerance potential.

关 键 词：巴东木莲幼苗 干旱胁迫 生理生化 

分 类 号：Q945.78[生物学—植物学]