镁缺乏和过量胁迫对大麦幼苗生长以及生理生化指标的影响  

Effects of Magnesium Deficiency and Excessive Stress on the Growth and Physiological and Biochemical Indexes of Barley Seedlings

作　　者：田斌 胡玉洁 路雪丽 童涛[1] 候琳琳 谭赛琼 陈建明[1] 薛大伟[1] 张晓勤[1] TIAN Bin;HU Yujie;LU Xueli;TONG TaG;HOU Linlin;TAN Saiqiong;CHEN Jianming;XUE Dawei;ZHANG Xiaoqin(College of Life and Environmental Sciences, IIangzhou Normal University, IIangzhou 310036, China)

机构地区：[1]杭州师范大学生命与环境科学学院,浙江杭州310036

出　　处：《杭州师范大学学报（自然科学版）》2018年第2期146-152,共7页Journal of Hangzhou Normal University(Natural Science Edition)

基　　金：国家自然科学基金项目(31401316);浙江省自然科学基金项目(LY14C130007);杭州市科委科研项目(20140432B03)

摘　　要：以大麦品种Zju3和Morex为试材,采用溶液培养法,在MgSO_4浓度分别为对照组的0%、50%、100%、150%和200%处理下,研究了镁缺乏和过量胁迫对Zju3和Morex苗期的生长和生理生化指标的影响,试图揭示大麦对镁胁迫的生理机制.结果表明:镁胁迫下,两种大麦的根长、干重和SPAD值降低,丙二醛(MDA)浓度、过氧化物酶(POD)活性及GSH摩尔浓度增加,超氧化物歧化酶(SOD)活性有下降趋势,但不显著,脯氨酸(Pro)的质量含量先增加后降低,而两种大麦的变化幅度并不显著.结果表明镁缺乏或过量均对大麦幼苗的生长、生理生化指标造成影响.Taking Zju3 and Morex as the materials,using the solution culture method in MgSO4 concentrations separately were 0%,50%,100%,150% and 200%,the effects of magnesium deficiency and excess stress on the physiological and biochemical indexes of Zju3 and Morex in seedling growth were studied to reveal the physiological mechanism of magnesium stress in barley.The results showed that under the stress of magnesium,the root length,dry weight and SPAD of two barley cultivars decreased,malondialdehyde（MDA）concentration,peroxidase（POD）activity and GSH concentration increased,superoxide dismutase（SOD）activity decreased,but not significantly,the content of proline（Pro）first increased and then decreased,but the changing amplitude of two barley cultivars was not significant.It was indicated that magnesium deficiency or excess had effects on the growth as well as the physiological and biochemical indexes of barley seedlings.

关 键 词：大麦 镁胁迫 生理指标 生化指标 

分 类 号：Q94[生物学—植物学]