干旱胁迫下幼苗期霸王的生理响应  

Response of physiology of Zygophyllum xanthoxylum seedlings under drought stress

作　　者：杨鑫光[1] 傅华[1] 牛得草[1] 

机构地区：[1]兰州大学草地农业科技学院

出　　处：《草业学报》2007年第5期107-112,共6页Acta Prataculturae Sinica

基　　金：国家重点基础研究发展计划(2007CB108903);国家自然科学基金项目(30671485和30371023)资助

摘　　要：以PEG6000模拟不同程度的水分胁迫,对霸王幼苗进行了处理,研究霸王对干旱胁迫的生理响应。结果表明,幼苗期霸王在干旱胁迫下叶片的保水能力降低,MDA和脯氨酸含量增加,可溶性糖含量下降。严重干旱胁迫(PEG浓度为30%)促进Na+在叶片中的积累,K+和Ca2+对干旱胁迫的反应不敏感。脯氨酸是幼苗期霸王适应干旱胁迫的主要渗透调节物质,严重干旱胁迫下Na+也起到了渗透调节作用。A study of Zygophyllum xanthoxylum seedling physiology under drought stress using treatments of different PEG6000 concentration showed. The moisture holding capacity of Z. xanthoxylum seedlings decreased under drought stress. The concentration of proline and MDA inceased rapidly but dissoluble sugar decreased under drought stress. Severe drought stress（30% PEG） promoted the accumulation of Na^＋ in the leaves but not K^＋ and Ca^2＋. It was concluded that proline was the primary osmotic adjusting materials and that Na^＋ reacted under the severe drought stress.

关 键 词：霸王 PEG 有机溶质 无机离子 

分 类 号：S548[农业科学—作物学]