路易斯安娜鸢尾对重金属镉的吸收、积累及其抗性的研究  

Study on cadmium uptake,accumulation and stress resistance in Louisiana iris

作　　者：韩鹰[1] 高岳[1] 王薇[1] 朱旭东[1] 邓鹏[2] 陈刚[2] 

机构地区：[1]苏州农业职业技术学院园艺科技学院,江苏苏州215008 [2]扬州大学生物科学与技术学院,江苏扬州225009

出　　处：《扬州大学学报（农业与生命科学版）》2014年第1期76-80,共5页Journal of Yangzhou University：Agricultural and Life Science Edition

基　　金：国家自然科学基金资助项目(30770344);江苏省科技支撑计划项目(BE2010337);苏州市科技计划项目(SNG201209);苏州农业职业技术学院科研基金资助项目(200801)

摘　　要：采用溶液培养法,研究0、10、100、500μmol·L-1浓度CdCl2处理对路易斯安娜鸢尾外部形态、镉积累量、叶绿素含量、光合参数以及抗氧化酶活性等各项指标的影响。结果表明:低浓度Cd2+处理对路易斯安娜鸢尾生长无明显影响,随着Cd2+胁迫强度上升,根长显著降低,叶绿素和光合速率显著下降,POD、SOD活性显著上升,CAT活性下降。此外,根内POD、SOD酶活性明显高于叶,而根内MDA含量低于叶。说明路易斯安娜鸢尾对100μmol·L-1以下Cd2+毒害具有较强的抗性和吸收、积累能力,且根是主要积累部位。To study the accumulation characteristics and stress resistance, the external morphology, Cd accumulation, chlorophyll content, photosynthetic parameters and activities of major antioxidant enzymes were investigated in Louisiana iris seedlings under 0, 10, 100 and 500μmol ·L^-1 CdC12 stress with hydroponics. The results showed that： The growth of Louisiana iris was not affected obviously under low Cd^2＋. With the increasing Cd^2＋ stress, root length, chlorophyll contents and photosynthesis rates decreased significantly. At the same time, POD and SOD activities increased while CAT activity declined. In addition, POD and SOD activities in roots were higher than those in leaves, while the MDA contents in roots were lower. These results indicated that Louisiana iris had strong absorption, accumulation and stress resistance abilities on Cd^2＋ , and roots were the main area for accumulation.

关 键 词：路易斯安娜鸢尾 镉 吸收 积累 抗性 

分 类 号：S682.19[农业科学—观赏园艺]