时珍国医国药2025，Vol.36Issue(11)：2086-2091,6.DOI:10.70976/j.1008-0805.SZGYGY-2025-1113
桔梗连作障碍中的自毒作用研究
Study on the autotoxicity in continuous cropping obstacle of Platycodon grandiflorus(Jacq.)A.Dc
摘要
Abstract
Objective This experiment investigates the mechanism of continuous cropping obstacles in Platycodon grandiflorus(Jacq.)A.Dc.(P.grandiflorus)from the perspective of allelopathic autotoxicity,aiming to provide a scientific basis for standardized cultivation practices.Methods The study investigated the effects of aqueous extracts from different parts of roots,stems,leaves,flowers,fruits and seeds of two-year-old P.grandiflorus seedlings on seed germination,seedling growth and antioxidant enzyme activity.The goal was to reveal whether effect of allelopathic autotoxicity existed in P.grandiflorus and find out the plant parts with the strongest autotoxicity,thereby offering theoretical insights into its continuous cropping obstacles.Results Within the concentration range of 20-50 mg·mL-1 during the experiment,aqueous extracts from different parts of P.grandiflorus exhibited inhibitory effects on its seed germination,with inhibitory effects ranked as fruits＞roots＞leaves＞seeds＞stems＞flowers.Selected concentrations and specific parts of aqueous extracts were further investigated on seedling growth.Results showed varying degrees of reduction in seedling height,root length,fresh weight,and dry weight,along with decreasing trend in contents of antioxidant enzyme and osmotic adjustment substance.Conclusion P.grandiflorus exhibits certain autotoxicity that impacts its seed germination and seedling growth by its presence.There are differences in autotoxicity observed among different plant parts or at varying concentrations of the same part,with the most significant autotoxicity ob-served in the roots.关键词
桔梗/自毒作用/种子萌发/幼苗生长/抗氧化酶类Key words
Platycodon grandiflorus(Jacq.)A.Dc./Autotoxicity/Seed germination/Seedling growth/Antioxidant enzymes分类
农业科技引用本文复制引用
乔娥,王晓琴,刘鹏飞,于娟,麻剑南,李和欢,贾鑫..桔梗连作障碍中的自毒作用研究[J].时珍国医国药,2025,36(11):2086-2091,6.基金项目
国家自然科学基金(82360740) （82360740）
高等学校青年科技人才项目(NJYT22019) （NJYT22019）
桔梗连作障碍效应及其机制研究(YKD2022MS013) （YKD2022MS013）
内蒙古医科大学善学人才项目 （）
