摘要
在土壤相对含水量为75%、55%、40%和25%的盆栽条件下,研究了二倍体毛泡桐(T2)、二倍体豫杂一号泡桐(TF2)、四倍体毛泡桐(T4)、四倍体豫杂一号泡桐(TF4)对干旱胁迫的生理响应。结果表明,随着干旱胁迫的增强,四倍体泡桐与其二倍体泡桐的生理生化指标变化趋势一致,叶片相对含水量和叶绿素含量呈下降趋势,四倍体泡桐的叶片相对含水量和叶绿素含量均高于其二倍体;相对电导率和丙二醛(MDA)含量呈上升趋势,四倍体泡桐小于其二倍体;超氧化物歧化酶(SOD)活性、叶片可溶性蛋白质含量呈先升高后降低趋势;可溶性糖含量和脯氨酸含量均呈升高趋势,四倍体泡桐高于其二倍体。对25%干旱胁迫下泡桐的各项生理指标利用模糊隶属函数法综合分析,抗旱性大小顺序为T4>TF4>T2>TF2。
With relative soil water contents of 75% ,55% ,40% and 25% ,the physiological re-sponse of diploid Paulow nia tomentosa（T2） ,diploid Paulow nia tomentosa × Paulow nia f ortunei （TF2） and their tetraploid Paulownia（T4 ,TF4） plants to drought stress were studied .The result showed that the changing trend of leaf physiological and biochemical indexes was consistent be-tween the tetraploids and their dipoid Paulownia plants with aggravation of drought stress .The water and chlorophyll contents of the leaves went down with aggravation of drought stress ,and the water and chlorophyll contents of the tetraploid Paulownia plants leaves were higher than those of the diploids .The relative conductivity and content of MDA increased with aggravation of drought stress ,with the tetraploid Paulownia plants less than the diploid .The SOD activity and soluble protein content increased firstly and decreased afterwards .The contents of soluble sugar and proline increased with aggravation of drought stress ,and the tetraploids were higher than its diploid .Based on the leaf physiological indexes in the soil with 25% relative soil water content by a comprehensive analysis of fuzzy membership functions ,the order of drought stress tolerance of the Paulownia plants was T4〉 TF4〉 T2〉 TF2 .
出处
《河南农业科学》
CSCD
北大核心
2013年第11期118-123,共6页
Journal of Henan Agricultural Sciences
基金
河南省杰出人才基金项目(122101110700)
郑州市科技创新团队资金项目(121PCXTD515)
关键词
二倍体泡桐
四倍体泡桐
干旱胁迫
生理响应
diploid Paulownia
tetraploid Paulownia
drought stress
physiological response
作者简介
张晓申（1976-），男，河南镇平人，在读博士研究生，研究方向：林木生物技术。E—mail：abf1232@163．com
通讯作者：范国强（1964-），男，河南禹州人，教授，博士，主要从事林木生物技术研究。E—mail：zlxx64@sohu．com
