盐分生境下长叶红砂和红砂内源激素含量及其生境差异性  

Endogenous hormone contents and their habitat differentia of Reaumuria trigyna and R.soongorica in different salt habitats

作　　者：石松利[1,2] 王迎春[1] 周健华[1,3] 周红兵[1,2] 

机构地区：[1]内蒙古大学生命科学学院,呼和浩特010021 [2]包头医学院,内蒙古包头014060 [3]呼伦贝尔市环境监测中心站,内蒙古呼伦贝尔市021008

出　　处：《应用生态学报》2011年第2期350-356,共7页Chinese Journal of Applied Ecology

基　　金：国家自然科学基金项目(30760052);内蒙古自治区自然科学基金重大项目(200711020501)资助

摘　　要：运用酶联免疫吸附法比较分析了盐分生境下长叶红砂及其近缘种红砂叶片中4种内源激素的含量差异,并对其在不同生境间的差异性进行了研究.结果表明:同一生境下长叶红砂的促进生长型激素吲哚乙酸(IAA)、赤霉素(GA3)和玉米素核苷(ZR)含量均低于红砂,抑制性激素脱落酸(ABA)含量高于红砂,这可能是长叶红砂的生态适应性弱于红砂的重要内在原因之一.长叶红砂的内源激素在不同生境间存在差异,(IAA+ZR+GA3)/ABA表现为:盐渍土>非盐渍土>重盐土,这与盐渍土的长叶红砂种群密度和盖度最大、非盐渍土次之、重盐土最小的结果一致,反映出长期生长在盐生环境下的长叶红砂已经进化出相应的内在适应机制,盐胁迫下内源激素的综合调控对长叶红砂的生长发育起到至关重要的作用.By means of Enzyme Linked Immunosorhent Assay（ELISA）,this paper analyzed the contents of endogenous hormones ABA,IAA,ZR,and GA3 in Reaumuria trigyna and its related congener R.soongorica from four different salt habitats.In the identical habitats,the contents of growth-promoting hormones IAA,ZR,and GA3 in R.trigyna were lower than those in R.soongorica,while the content of growth-suppressing hormone ABA was in contrary,which could be one of the main reasons that R.trigyna had a weaker ecological adaptability than R.soongorica.The（IAA＋ZR＋GA3） /ABA in wild R.trigyna varied with habitats,being saline soil non-salinized soil heavy solonchack,which was consistent with the density and coverage of R.trigyna population being the largest on saline soil and followed by on non-salinized soil and heavy solonchack,and suggested that R.trigyna having lived in saline habitat for a long time developed a corresponding inherent adaptation mechanism,and that the integrative regulation of endogenous hormones under salt stress played a key role for the growth and development of R.trigyna.

关 键 词：长叶红砂 红砂 内源激素 盐生植物 

分 类 号：Q948[生物学—植物学]