NaCl胁迫对3种鹅观草幼苗耐盐性研究  

The Study of Salt Tolerance of Three Species Seedling of Roegneria

作　　者：陈景芋[1,2] 解继红[1] 徐柱[1] 杨凯 尹军 

机构地区：[1]中国农业科学院草原研究所,呼和浩特010010 [2]新疆农业大学草业与环境科学学院,乌鲁木齐830052 [3]内蒙古草原工作站,呼和浩特010020 [4]满洲里市市政公用事业管理局,内蒙古自治区满洲里市021400

出　　处：《中国农学通报》2011年第1期383-388,共6页Chinese Agricultural Science Bulletin

基　　金：中央级公益性科研院所基本科研业务费专项资金(中国农业科学院草原研究所)资助项目

摘　　要：研究探讨随着盐分浓度的递增对鹅观草幼苗生物学指标的影响规律,为今后鹅观草属植物耐盐育种提供科学依据并为解决大西北草原盐碱化这一问题提供优良牧草资源。以3种鹅观草为供试材料,利用不同浓度NaCl溶液对其进行胁迫处理7天,测定它们的株高、根长、叶长、叶宽、地上部分鲜重及干重、地下部分鲜重及干重等苗期生物学指标。试验研究表明:低盐浓度对3种鹅观草幼苗生物学指标影响较小;随着盐浓度高的增大,3种鹅观草各项指标均受到严重抑制,且达到极显著差异(P<0.01)。综合分析各项生物学指标,认为3种鹅观草幼苗耐盐敏感性:偏穗鹅观草最耐盐,大芒鹅观草最敏盐,肃草介于二者之间。This article investigated biological indicators influence rule of salt tolerance on Roegneri Seedling, provide scientific basis for Roegneri breeding, and provided fine forage resource to solute the question of northwest grassland alkalization. Different concentrations of NaCl solution on the three species of Roegneria （3-leaf stage） for stress treatment 7 days, measured their biological indicators such as height, root length, leaf length, leaf width, shoot fresh weight and dry weight, fresh weight of the underground sections and dry weight. Experimental studies had shown that： low-salt concentration on the three species of Roegneria biological indicators little effect on seedling; with a high salt concentration increases, the three species of Roegneria indicators are severely inhibited, and reached a very significant difference （P0.01）. Comprehensive analysis of biological indicated that the three species of salt-sensitive Roegneria seedlings： the seedling of （R. komarovii （Nevski）Nevski） exhibit the greatest salt tolerance, and the seeding of R. turczaninovii （Drob） Nevski var. macrathera Ohwi） exhibit the worst salt sensitivity and （R. stricta Keng f. stricta） be placed in the middle.

关 键 词：鹅观草 NACL胁迫 幼苗 生物学指标 

分 类 号：S332.6[农业科学—作物遗传育种]