外源Ca^(2+)对伞花木和大白杜鹃生长及矿质元素含量代谢的影响  

Effect of Exogenous Ca^(2+) on Growth of Eurycorymbus cavaleriei and Rhododendron decorum

作　　者：苏迪[1,2] 乙引[1,2] 张习敏[1,2] 杨立昌 林俊清[2] 

机构地区：[1]贵州省植物生理与发育调控重点实验室,贵州贵阳550001 [2]贵州师范大学生命科学学院,贵州贵阳550001

出　　处：《贵州林业科技》2012年第3期23-27,共5页Guizhou Forestry Science and Technology

基　　金：国家自然科学基金(30460031);贵州省优秀科技教育人才省长专项资金(黔省专合字[2008]26号);贵州省科技创新人才团队建设项目(黔科合人才团队[2009]4007号);贵州省科学技术厅贵州师范大学联合基金(黔科合J字LKS[2010]18号)

摘　　要：本文以喜钙植物伞花木和嫌钙植物大白杜鹃为实验材料,比较研究了外源Ca2+对其生长、叶绿素含量和矿质元素含量分布的影响。结果表明:在0~50mmol/L范围内,随着外源Ca2+浓度的增加,伞花木植株高度、基茎以及叶重、叶长、叶宽和叶形指数均得到促进,叶绿素含量增加;嫌钙植物的生长却受到抑制,叶绿素含量降低;进一步分析了两种植物植株体内N、P、K和Ca等元素含量变化,喜钙植物表现出很好的体内Ca稳态和P吸收,嫌钙植物表现出显著的Ca累积和较低的P吸收。表明伞花木对Ca2+有良好的适应性,Ca和P的运转及作用机理可能与植物喜钙机制相关。The plant growth,chlorophyll content,mineral element accumulation were measured to study the efffect of exogenous Ca2＋ on Eurycorymbus cavaleriei（calcicole） and Rhododendron decorum（calcifuge）.The results showed that several parameters,such as plant height,leaf dry weight,leaf length,leaf width,leaf index,stem diameter,contents of chlorophyll of Eurycorymbus cavaleriei were promoted with the increase of exogenous Ca2＋ concentration,while for Rhododendron decorum,these parameters were prohibited.In addition,at the range of 0-50mmol/L concentration of exogenous Ca2＋,Eurycorymbus cavaleriei has better maintenance calcium homeostasis and higher phosphor absorption,while Rhododendron decorum has remarkable calcium accumulation and lower phosphor absorption simultaneously.It was concluded that Eurycorymbus cavaleriei（calcicole） have developed a physiological mechanism to adopt the environment with excessive calcium.

关 键 词：喜钙植物 嫌钙植物 外源CA2+ 生理代谢 

分 类 号：S718.43[农业科学—林学]