中国油料作物学报2024，Vol.46Issue(3)：544-553,10.DOI:10.19802/j.issn.1007-9084.2024115
玉米根系分泌物改变酚酸类物质对花生种子发芽及病原菌的化感作用
Maize root exudates change allelopathy effects of phenolic acids on peanut seed germination and pathogenic bacteria
摘要
Abstract
In order to further explore the mechanism of peanut continuous cropping obstacle alleviated by maize-peanut intercropping,the effects of maize root exudates on the allelopathy of 3 phenolic acid allelochemicals and their mixtures were studied by the method of collecting maize root exudates and adding them to the medium of peanut seeds and pathogenic bacteria treated with phenolic acids.The results showed that two concentrations(0.75 mmol/L,1.5 mmol/L)of cinnamic acid,phthalic acid,p-hydroxybenzoic acid and their mixtures mainly had allelo-pathic inhibitory effects on the growth of peanut embryo and two pathogenic bacteria Fusarium oxysporum and Colle-totrichum dematium,namely.Maize root exudates promoted the germination of peanut seeds,and mainly inhibited the germination of Fusarium oxysporum and Colletotrichum dematium.After adding maize root exudates,the allelo-pathic inhibiting effects of 3 phenolic acids and their mixtures on peanut seed germination were alleviated and the allelopathy indices were reduced by 60.10%-88.11%under low concentration treatment.Their allelopathic inhibit-ing effects on Fusarium oxysporum were strengthened and the allelopathy indicies were increased by 28.00%-46.55%under high concentration treatment.The direction of allelopathic effect of p-hydroxybenzoic and the mix-ture of 3 acid phenolic acids on Colletotrichum dematium was changed from promoting effect to inhibiting effect.Maize root exudates could reduce the allelopathic inhibiting effect of autotoxic phenolic acids in peanut continuous cropping obstacle on seed germination and enhance their inhibitory effect on pathogenic bacteria in soil,which might provide theoretical basis for maize and peanut intercropping to alleviate peanut continuous cropping obstacle and is conducive to the coordinated improvement of the comprehensive production capacity of grain and oil crops.关键词
玉米根系分泌物/酚酸类物质/化感作用/病原菌/花生连作障碍Key words
maize root exudates/phenolic acids/allelopathy/pathogenic bacteria/peanut continuous crop-ping obstacle分类
农业科技引用本文复制引用
赵忆南,李庆凯,刘苹,郭峰,唐朝辉,赵自超,万书波,张正,李宗新..玉米根系分泌物改变酚酸类物质对花生种子发芽及病原菌的化感作用[J].中国油料作物学报,2024,46(3):544-553,10.基金项目
国家自然科学基金面上项目(32272227) （32272227）
国家重点研发计划(2021YFD1900903) （2021YFD1900903）
泰山学者工程(tstp20231236) （tstp20231236）
山东省高等学校青创科技支持计划(2022KJ245) （2022KJ245）
山东省农业科学院农业科技创新工程(CXGC2023C01) （CXGC2023C01）
