温度对3种常见浮萍生长效应的研究  

Effect of temperature on growth of three common duckweed species

作　　者：陈侠桦 黄荣松[1] 郭利利[1] 苏瑞芳[2] 沈健英[1] 

机构地区：[1]上海交通大学农业与生物学院,上海200240 [2]上海市奉贤区农业技术推广中心,上海201400

出　　处：《上海农业学报》2014年第5期84-89,共6页Acta Agriculturae Shanghai

基　　金：国家科技部项目"农业面源污染防控关键技术研究与示范"(2012BAD15B00)

摘　　要：以上海地区常见的浮萍多根紫萍[Spirodela polyrrhiza(L.)Schleid]、少根紫萍[Spirodela oligorrhiza(kurz)Hegelm]和青萍(Lemna minor L.)为研究对象,研究温度对浮萍生长效应的影响。结果表明:在10—40℃下,3种浮萍均能生长繁殖。30℃时,多根紫萍、少根紫萍和青萍鲜重、株数和叶片数的相对生长率均达到最大值。浮萍的3种保护酶:过氧化氢酶(CAT)、过氧化物酶(POD)、超氧化物歧化酶(SOD)的变化趋势与浮萍生物量变化趋势一致,均在30℃时生长状况最好,在10℃和40℃时,生长速度缓慢。通过对三种浮萍形态特征的观察发现,其变化情况与温度对浮萍生物量和保护酶的影响情况类似。Three common duckweeds that Spirodela polyrrhiza （L.） Schleid, Spirodela oligorrhiza （kurz）Hegelm and Lemna minor L.in Shanghai were studied to investigate the effect of temperature on the growth of duckweeds. Temperature is set to 10 ℃ ,15 ℃ ,20 ℃ ,25 ℃ ,30 ℃ ,35 ℃ ,40 ℃ .The results showed that three duckweeds could all grow and reproduce. They all grew best at 30 ℃ by fresh weight, numbers of plant and numbers of fronds. Meanwhile, there have the same trend on the protective enzymes（CAT, POD and SOD） activity and biomass of duckweed both at 30 ℃. The growth of duckweed is slowly at 10 ℃ and 40 ℃. It is further demonstrated the effect of temperature on duckweed growth trend through the observation of morphological characteristics of three duckweeds.

关 键 词：浮萍 温度 生物量 形态特征 保护酶 

分 类 号：X171.1[环境科学与工程—环境科学]