摘要
以落羽杉、中山杉118、中山杉406为材料,通过测定水培实验,进行不同浓度重金属镉胁迫研究。通过测定叶片可溶性糖、可溶性蛋白、脯氨酸等渗透调节系统指标含量,比较不同中山杉无性系对不同镉浓度胁迫下的响应特性及其变化,筛选耐镉无性系,并从渗透调节平衡角度初步探讨其耐重金属镉的生理机制,为我国重金属镉污染地区造林树种选择及中山杉耐镉机理的研究提供依据。结果表明:镉胁迫下,3个中山杉无性系表现出不同的响应特性及性状,中山杉406的可溶性糖以及可溶性蛋白含量变化最为稳定,脯氨酸增长最明显,因而,中山杉406在重金属镉胁迫下的渗透调节能力最强。
Utilizing Taxodium distichum,Zhongshanshan 118,and Zhongshanshan 406 as experimental materials,a hydroponic cultivation experiment was conducted to investigate the effects of heavy metal cadmium stress.The study assessed the osmotic adjustment system indicators such as leaf soluble sugars,proline,and soluble proteins content to compare the response characteristics of different Zhongshanshan clones under various cadmium concentrations.The objective was to select clones with cadmium tolerance and preliminarily explore the physiological mechanisms underlying their heavy metal cadmium resistance from the perspective of osmotic regulation.The findings indicate that under cadmium stress,the three Zhongshanshan clones displayed distinct response traits.Notably,Zhongshanshan 406 exhibited the most stable levels of leaf soluble sugars and soluble proteins content,and a pronounced increase in proline content,thereby demonstrating the most robust osmotic adjustment capacity in response to heavy metal cadmium stress.
作者
李敏
刘飞
郜昌健
刘金林
LI Min;LIU Fei;GAO Changjian;LIU Jinlin(Zhejiang Forestry Survey Planning and Design Co.,Ltd.,Hangzhou 310020,Zhejiang;Lishui Xuyang Forestry Development Co.,Ltd.,Lishui 310020,Zhejiang)
出处
《浙江农业科学》
2025年第9期2194-2199,共6页
Journal of Zhejiang Agricultural Sciences
关键词
镉胁迫
可溶性糖
可溶性蛋白
脯氨酸
渗透调节
中山杉
cadmium stress
soluble sugar
soluble protein
proline
osmotic regulation
Taxodium hybrid Zhongshanshan
