不同形态氮素对菹草响应Cd胁迫的影响  

Influence of different nitrogen forms on Potamogeton Crispusunder in response to Cd stress

作　　者：邱伟建 耿梦蝶 钱程远 郭赟 魏超 成小英[2,3,4] 黄晓峰 QIU Weijian;GENG Mengdie;QIAN Chengyuan;GUO Yun;WEI Chao;CHENG Xiaoying;HUANG Xiaofeng(Wuxi Taihu Lake Remediation Co.,Ltd,Wuxi 214100,China;School of Environmental and Civil Engineering,Jiangnan University,Wuxi 214122,China;Jiangsu Key Laboratory of Anaerobic Biotechnology,Wuxi 214122,China;Jiangsu Province Water Treatment Technology and Materials Collaborative Innovation Center,Suzhou 215000,China)

机构地区：[1]无锡市太湖湖泊治理股份有限公司,无锡214000 [2]江南大学环境与土木工程学院,无锡214122 [3]江苏省厌氧生物技术重点实验室,无锡214122 [4]江苏省水处理技术与材料协同创新中心,苏州215000

出　　处：《生物学杂志》2021年第1期66-71,共6页Journal of Biology

基　　金：水体污染控制与治理科技重大专项(2017ZX07203-005-07)。

摘　　要：为研究不同形态氮素NO^-3-N和NH^+4-N在镉(Cd)胁迫下植物生长发育的影响机制,以多年生植物菹草(石芽)为试验材料,就不同形态氮处理后菹草在Cd胁迫下的可溶性蛋白、MDA、H2O2、O·^-2、SOD、POD、CAT的含量进行测定分析。结果显示:添加Cd后,菹草根茎叶明显受到胁迫,NH^+4-N和NO^-3-N均缓解了Cd对菹草的胁迫,同时,相比于NH+4-N+Cd组,NO^-3-N+Cd组的O·^-2、H2O2及MDA含量较低,且SOD、POD和CAT的活性也相对较低,NO-3-N更好地缓解了Cd对菹草的胁迫。通过比较菹草不同器官的抗氧化系统酶活性,对Cd胁迫的敏感程度顺序依次为根>叶>茎。In order to study the influence mechanism of different forms of nitrogen(NO^-3-N and NH^+4-N)on the growth and development of plants under Cd stress,the contents of soluble protein,MDA,H2O2,O·^-2,SOD,POD,and CAT activifices were measured and analyzed with Potamogeton crispusunder L.turions as the experimental material.The results showed that after adding Cd,the root,stems,and leaves of Potamogeton crispusunder L.were significantly stressed,while both NO^-3-N and NH^+4-N alleviated the stress.Also,compared with NH^+4-N^+Cd group,the contents of O·^-2,H2O2 and MDA in NO^-3-N+Cd group were lower associated with the activities of SOD,POD and CAT.NO^-3-N had a more significant positive role in alleviating Cd stress to Potamogeton crispusunder L.By comparing the antioxidant system enzymatic activities of different organs of Potamogeton crispusunder L.,the order of sensitivity to Cd stress was as follows:root>leaf>stem.

关 键 词：菹草 CD胁迫 硝氮 氨氮 影响 

分 类 号：Q945.78[生物学—植物学]