华南农业大学学报2026，Vol.47Issue(3)：527-534,8.DOI:10.7671/j.issn.1001-411X.202507027
团花幼苗对土壤干旱胁迫的生长和生理生化响应
Growth and physiological-biochemical responses of Neolamarckia cadamba seedlings to soil drought stress
摘要
Abstract
[Objective]To investigate the growth and physiological-biochemical responses of Neolamarckia cadamba seedlings under varying soil drought stress gradients,and provide a scientific basis for water management in cultivation of N.cadamba seedlings.[Method]A controlled pot experiment was conducted with four drought treatments:control[CK,80%-85%field capacity(FC)],light drought(LD,65%-70%FC),moderate drought(MD,50%-55%FC),and severe drought(SD,35%-40%FC).Seedling height,ground diameter,root morphology,leaf morphological traits,osmoregulatory substances contents and antioxidant enzyme activities were measured.Fuzzy membership function analysis was used to comprehensively evaluate the adaptability of N.cadamba under different treatments.[Result]Drought stress significantly reduced leaf length,leaf width and leaf area(P<0.05)but did not affect the leaf length-to-width ratio.MD and SD significantly decreased seedling height,ground diameter,and superoxide dismutase activity,while significantly increased soluble protein and malondialdehyde contents(P<0.05).LD had no significant impact.SD significantly reduced seedling biomass,root length,root surface area,and root volume(P<0.05).Average root diameter,soluble sugar content,proline content,and peroxidase activity showed no significant difference among treatments.Comprehensive evaluation by fuzzy membership function analysis ranked the growth and physiological-biochemical performance of N.cadamba seedlings under different treatments as CK>LD>MD>SD.[Conclusion]N.cadamba seedlings grow optimally under well-watered conditions,tolerate light drought with limited impact,but suffer significant growth inhibition and oxidative damage under moderate and severe drought.N.cadamba exhibits weak drought tolerance,and therefore prolonged moderate or severe soil drought should be avoided in cultivation.关键词
团花/干旱胁迫/水分生理/隶属函数分析Key words
Neolamarckia cadamba/Drought stress/Water physiology/Membership function analysis分类
农业科技引用本文复制引用
甘子叶,邵国栋,苏立城,朱洁怡,曾曙才..团花幼苗对土壤干旱胁迫的生长和生理生化响应[J].华南农业大学学报,2026,47(3):527-534,8.基金项目
广东省林业科技创新项目(2022KJCX015) （2022KJCX015）
