3种常见豆科乔木的耐旱性分析

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Abstract

Plants are important in landscape design，yet increasing global drought poses a serious challenge to both plants and urban botanical landscaping，making it necessary to investigate the drought tolerance of common landscape plants.In this study，threeyear-old seedlings of three common Fabaceae tree species，Robinia pseudoacacia， Styphnolobium japonicum，and Gleditsia sinensis，were subjected toa 28-day drought treatment.Their drought tolerance was comprehensively evaluated by measuring chlorophyll a content， malondialdehyde （MDA） content， superoxide dismutase （SOD） activity， catalase （CAT） activity， and peroxidase （POD） activity. Under drought stress， Styphnolobium japonicumand Gleditsia sinensis showed no significant decreasein chlorophyll a content orantioxidant enzyme activities，nor a significant increase in MDA content，suggesting relatively good drought tolerance.Incontrast，Robiniapseudoacacia showed a significant decrease in antioxidant enzyme activities and a significant increase in MDA content during the drought period，suggesting weaker tolerance. According to the result of the membership function method， it was determined that among the three species， Gleditsia sinensis had the strongest drought tolerance，followed by Styphnolobium japonicum，whileRobiniapseudoacaciaexhibited theweakest.

Keywords

Drought tolerance; Drought stress;Fabaceae species; Antioxidant enzyme activity

收稿日期：2025-07-26

修回日期：2025-12-09

文章亮点

1）选择三年生苗木为试验材料，采用混合基质，且试验地点位于亚热带气候区域，拓宽了前人研究多在温带区域、以一年生苗木作为试验材料的试验气候区域及苗龄范围，证实了苗龄与植物抗旱能力间无显著关系，不同植物间的耐旱性差异主要取决于物种自身特性。（剩余12150字）