安徽农业大学学报2017，Vol.44Issue(2)：272-276,5.DOI:10.13610/j.cnki.1672-352x.20170419.002
3种园林植物的抗盐光合特性
Photosynthetic characteristics of three garden plants in response to salt stress
摘要
Abstract
In order to provide a reference for the selection of garden plants in saline land,leaf photosynthetic responses of Ervatamia divaricata,Excoecaria cochinchinensis and Duranta repens to salt stress were studied,and their differences in leaf photosynthetic characters under salt stress were compared.The experimental seedlings were placed in a simulated salt environment,and their photosynthetic indexes were determined,and the principal component method was used to evaluate their salt resistance.The results showed thatat 0.3 ％ salt concentration,with increasing salt stress time,Pn of the three species continuously decreased;Gsand Ci of E.divaricata and D.repens continuously decreased,whereas E.cochinchinensis increased and then decreased;Tr of E.divaricata and E.cochinchinensis continuously decreased,whereas D.repens decreased followed by an increase.At 0.6 ％ salt concentration,Pn of the three species continuously decreased,Gs of E.divaricata decreased followed by an increase,while the other two species decreased;Ci ofE.divaricata and D.repens decreased followed by an increase,whereas E.cochinchinensis continuously decreased;Tr of the three species of seedlings decreased followed by an increase.Principal component analysis showed that under salt stress,photosynthetic index scores of the three species seedlings decreased in the order ofE.cochinchinensis ＞ E.divaricata ＞ D.repens.Among these seedlings,E.cochinchinensis possessed the highest leaf photosynthetic activity.Therefore,E.cochinchinensis has stronger salt tolerance and is more suitable for use in salt land,whereas D.repens has weaker salt tolerance compared with the others.关键词
盐胁迫/幼苗/光合指标/主成分分析Key words
salt stress/seedling/photosynthetic index/principal component analysis分类
农业科技引用本文复制引用
蔡金桓,都成林,薛立,叶自慧,郑欣颖,李子华..3种园林植物的抗盐光合特性[J].安徽农业大学学报,2017,44(2):272-276,5.基金项目
广州市科技项目“广州市生态园林技术研究企业重点实验室”(2014SY000010)资助. （2014SY000010）
