4种藤本植物的抗旱性比较

A comparative study on drought resistances of four species of lianas

以4种藤本植物的2年生实生苗为材料,采用盆栽试验方法,观测4种藤本植物的生长指标及形态特征,测定干旱胁迫对4种藤本植物叶片相关生理生化指标的影响。结果表明,干旱胁迫下,美国凌霄的细胞膜透性和丙二醛含量增加最快,常春藤的脯氨酸含量增加最快;随着干旱时间持续,美国凌霄的超氧化物歧化酶(SOD)活性持续下降,常春藤的SOD活性变化较平缓,花叶络石和黄金络石的各指标变化趋势都居于中间。模糊数学隶属函数法综合评价,4种藤本植物抗旱能力大小顺序为常春藤>黄金络石>花叶络石>美国凌霄。

Pot experiment was conducted on four species of 2-years-old lianas,the growth indies and morphological characteristics were measured and their physiological and biochemical performances were determined under drought stress.In response to drought stress,the cell membrane permeability and the content of malondialdehyde（ MDA） in Campsis radicans and the content of proline in Hedera nepalensis increased the fastest. As drought lasted,the superoxide dismutase（ SOD） activity in C. radicans continued to decline,and changed gently in H. nepalensis. The assessment of drought resistances by a fuzzy membership function method revealed that the drought resistances in four species of lianas follwed the order of H. nepalensis 〉Trachelospermum asiaticum〉 T. jasminoides〉C. radicans.