高温胁迫对苦草、伊乐藻生长及水环境的影响  

Effects of High Temperature Stress on the Growth and Water Environment of Vallisneria Natans and Elodea Nuttalli

作　　者：陈泽伟 马行空[1,3] 田间 王志红 葛家春 CHEN Zewei;MA Xingkong;TIAN Jian;WANG Zhihong;GE Jiachun(Jiangsu Provincial Freshwater Fisheries Research Institute,Nanjing,Jiangsu 210017,China;College of Fisheries and Life Science,Shanghai Ocean University,Shanghai 201306,China;Jiangsu Provincial Science and Technology Resources Coordination Service Center Yangtze River Eriocheir Sinensis Germplasm Resource Bank,Nanjing 210017,China;Jiangsu Provincial Eriocheir Sinensis Industry Research Center,Nanjing,Jiangsu 210017,China)

机构地区：[1]江苏省淡水水产研究所,江苏南京210017 [2]上海海洋大学水产与生命学院,上海201306 [3]江苏省科技资源统筹服务中心长江系中华绒螯蟹种质资源库,江苏南京210017 [4]江苏省河蟹产业研究中心,江苏南京210017

出　　处：《水产养殖》2024年第12期12-19,共8页Journal of Aquaculture

基　　金：江苏省种业振兴揭榜挂帅项目(JBGS[2021]126);江苏现代农业产业技术体系建设专项资金;江苏省农业种质资源保护与利用平台项目。

摘　　要：开展高温胁迫对苦草、伊乐藻生长及水质的影响试验。设置3个试验组,分别为A组、B组和C组,对应水温为25,35和39℃,每个试验组3个重复,为期30 d。结果表明,A组、B组和C组苦草比起始质量分别增长(120.2±27.5)%,(73.8±33.4)%和(-100.0±0.0)%;伊乐藻比起始质量分别增长(28.9±11.3)%,(-58.8±10.6)%和(-100.0±0.0)%。C组的伊乐藻从正式试验的第2天开始出现死亡,苦草在第7天出现部分根须及叶片腐解。B组苦草和伊乐藻在第2天CAT活力升高(P>0.05),MDA含量升高(P<0.05),苦草和伊乐藻SOD活性呈上升趋势。C组伊乐藻水体TP先大幅升高,后回落至初始水平。A组、B组和C组苦草水体TN分别降低了(65.3±16.5)%(P<0.01)(66.7±5.5)%(P<0.01)(39.8±6.4)%(P<0.05),伊乐藻水体TN浓度分别降低了(74.1±1.3)%(P<0.01)(41.9±9.5)%(P>0.05)(52.6%±5.6)%(P<0.05)。A组、B组和C组苦草沉积物氧化还原电位分别提高了(209.2±11.0)%,(171.7±8.9)%和(-68.3±8.3)%,伊乐藻沉积物氧化还原电位分别提高了(153.6±7.8)%,(-1.1±20.0)%和(-78.6±12.4)%。The effects of high temperature stress on the growth and water quality of Vallisneria natans and Elodea nuttallii were tested.Three experimental groups were set up,which were group A,group B and group C,and the corresponding water temperatures were 25,35 and 39℃,with three replicates in each experimental group for 30 days.The results showed that group A,group B and group C increased by(120.2±27.5)%,(73.8±33.4)%and(-100.0±0.0)%than the initial weight.Elodea nuttallii increased by(28.9±11.3)%,(-58.8±10.6)%and(-100.0±0.0)%than the initial weight.In group C,Elodea nuttallii died from the second day,and some roots and leaves of Vallisneria natans decomposed on the seventh day.In group B,the CAT activity and MDA content increased(P>0.05),and the SOD activity of Vallisneria natans and Elodea nuttallii increased on the second day.In group C,the TP of Elodea nuttallii increased greatly at first,and then fell back to the initial level.In group A,group B and group C,the TN of Vallisneria natans decreased(65.3±16.5)%(P<0.01)(66.7±5.5)%(P<0.01)(39.8±6.4)%(P<0.05),and the TN concentration of Elodea nuttallii decreased(74.1±1.3)%(P<0.01)(41.9±9.5)%(P>0.05)(52.6%±5.6)%(P<0.05).In group A,group B and group C,the redox potential of Vallisneria natans sediments increased by(209.2±11.0)%,(171.7±8.9)%and(-68.3±8.3)%respectively,and that of Elodea nuttallii sediments increased by(153.6±7.8)%,(-1.1±20.0)%and(-78.6±12.4)%respectively.

关 键 词：苦草 伊乐藻 高温 抗氧化酶 氧化还原电位 

分 类 号：S966.5[农业科学—水产养殖]