热带亚热带植物学报2026，Vol.34Issue(1)：83-91,9.DOI:10.11926/jtsb.5020
热带园林灌木翅荚决明对水分胁迫的生长响应
Growth Response of Tropical Landscape Shrubs Senna alata to Water Stress
摘要
Abstract
The strong seasonal rainfall in south China frequently subjects plants to water stress,making the selection and application of water-edge garden plants a key issue in the construction of sponge cities.To explore the morphological response strategies of tropical garden plants in water-edge areas,the leaf traits,root traits and biomass allocation of Senna alata seedlings under three water stress conditions,namely continuous flooding,continuous drought and alternate drought and flooding,were measured.The results showed that water stress had a significant impact on 15 indicators including leaf area,leaf thickness,specific root length,root tissue density,root biomass and leaf biomass of S.alata(P<0.05).Continuous flooding had a greater impact on leaf traits,while root traits were more sensitive to continuous drought.Alternate drought and flooding stress had a relatively small impact on the leaf traits,root traits and biomass of S.alata.The impact of water stress on roots with a diameter of 0.50 mm≤d<2.00 mm was the most significant.There was a certain correlation between the leaf and root traits of S.alata.Under water stress,the growth strategy of S.alata tended to be slow investment and return type.Therefore,Senna alata has better adaptability to alternate drought and flooding stress and is suitable for promotion and application in urban green spaces such as water-edge green spaces and rain gardens where alternate drought and flooding stress may occur.关键词
园林灌木/翅荚决明/水分胁迫/根系性状/叶性状/生物量Key words
Landscape shrub/Senna alata/Water stress/Root trait/Leaf trait/Biomass引用本文复制引用
余平二,梁俊龙,翁殊斐,黄伊淳,徐菲灿..热带园林灌木翅荚决明对水分胁迫的生长响应[J].热带亚热带植物学报,2026,34(1):83-91,9.基金项目
国家自然科学基金项目(32171852)资助 This work was supported by the National Natural Science Foundation of China(Grant No.32171852). （32171852）
