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当前位置: 首页 > 文章 > 天然盐碱土壤对虎尾草茎叶有机酸积累影响及胁迫因子分析 草业学报 2015,24 (4) 95-103
Position: Home > Articles > Effect of natural saline soil on organic acid accumulation in the stem and leaf of Chloris virgata and analysis of stress factors Acta Prataculturae Sinica 2015,24 (4) 95-103

天然盐碱土壤对虎尾草茎叶有机酸积累影响及胁迫因子分析

作  者：
吕家强;李长有;杨春武;胡锐
单  位：
辽东学院农学院;吉林师范大学生命科学学院;东北师范大学生命科学学院
关键词：
虎尾草;天然盐碱化土壤;土壤电导率;有机酸积累;多元回归
摘  要：
虎尾草是一种耐盐碱性很强的天然牧草,在吉林省长岭县盐碱化草地上随机选择45个虎尾草天然种群样点,测量每个样点的土壤电导率、pH、缓冲量3个因素作为反映土壤盐碱化程度的胁迫强度指标,在每个样点上测量虎尾草茎叶中有机酸含量作为反映植物生理响应的胁变指标,进行回归分析。结果表明:虎尾草茎叶大量积累柠檬酸、苹果酸、草酸以及总有机酸以响应强盐碱胁迫且与三胁迫因素呈显著正相关,仅积累量较低的琥珀酸相反。多元回归分析发现土壤电导率对除了琥珀酸之外的其他有机酸积累影响最大,电导率可以作为天然盐碱化土壤环境下考察虎尾草响应盐碱胁迫的主要胁迫因素。
译  名：
Effect of natural saline soil on organic acid accumulation in the stem and leaf of Chloris virgata and analysis of stress factors
作  者：
LV Jia-Qiang;LI Chang-You;YANG Chun-Wu;HU Rui;Agricultural College,Eastern Liaoning University;College of Life Science,Jilin Nnormal University;College of Life Science,Northeast Normal University;
关键词：
Chloris virgata;;natural saline alkali soil;;soil electric conductivity;;organic acids accumulation;;multiple regression
摘  要：
Chloris virgatais a native forage grass with strong salt-alkali resistance.Samples of 45 natural populations of C.virgata were randomly chosen from the saline meadows in Changling County,Jilin Province.Soil electrical conductivity,pH and buffering capacity were measured in each sample area to assess the degree of soil salinization and associated plant stress.Organic acid contents in C.virgatastems and leaves were measured as plant physiological response indexes.A regression analysis was conducted incorporating incorporating both plant and soil data.C.virgataaccumulated large amounts of organic acids including citric acid,malic acid and oxalic acid in response to strong salt-alkali stress,and there was a significantly positive correlation between the accumulation of citric acid,malic acid,oxalic acid and total organic acids and the three soil indexes.By contrast,the level of amber acid was less under saline stress and was negatively correlated with the three soil indexes.Further multiple regression analysis showed that soil electrical conductivity was more strongly correlated with the accumulation of the plant organic acids(except succinic acid)than pH and buffering capacity.In conclusion,soil electric conductivity can be used as a reliable indication of stress intensity faced by C.virgata plants exposed to salt-alkali stress in natural saline environments.

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