铅对沉水植物龙须眼子菜光合作用的影响  

The Effect of Pb^(2+) to the Photosynthesis of Aquatic Macrophyte Potamogeton pectinatus

作　　者：高海荣[1] 黄振旭[1] 卫世乾[2] 

机构地区：[1]郑州师范学院化学系,河南郑州450044 [2]许昌学院学报编辑部,河南许昌461000

出　　处：《信阳师范学院学报（自然科学版）》2014年第2期239-242,共4页Journal of Xinyang Normal University(Natural Science Edition)

基　　金：河南省自然科学研究指导计划项目(2010B150031)

摘　　要：采用实验室内植物块茎培养沉水植物的实验方法,研究了不同质量浓度Pb2+胁迫下龙须眼子菜的生长状况及光合作用参数的变化.结果表明:随着Pb2+浓度的提高,植株高度受到抑制、叶片黄化、植株根部部分变灰腐烂;叶绿素含量显著降低且与铅浓度呈现显著负相关;核酮糖二磷酸羧化酶活性先升高后降低,酶活性与Pb2+浓度呈显著负相关;磷酸烯醇式丙酮酸羧化酶活性变化小;碳酸酐酶活性先降低后上升.Using the experiment method of tuber culture in the laboratory, the photosynthesis effects and physiologi- cal response of the aquatic macrophyte Potamogeton pectinatus were investigated in Pb2 ＋ with different concentrations. The results showed that the Potamogeton pectinatus growth was inhibited with the increase of the concentration, chloro- phyll content reduced significantly and showed negative correlation with Pb2＋ concentrations, RuBPc activity first in- creased and then decreased, and it was negatively correlated with Pb2＋ concentrations, PEPc activity changed little, CA activity first decreased and then increased.

关 键 词：PB2+ 龙须眼子菜 叶绿素 RUBP羧化酶 PEP羧化酶 CA酶 

分 类 号：Q945.78[生物学—植物学]