外源褪黑素对重茬胁迫下平邑甜茶幼苗元素吸收利用的影响  

Effects of exogenous melatonin on the uptake and utilization of nutrients in Malus hupehensis seedlings under replant stress

作　　者：何晓龙 刘怀特 张纪冉 尚雨薇 周莎莎 李中勇[1] 张学英[1] 徐继忠[1] 梁博文 HE Xiaoong;LIU Huaite;ZHANG Jiran;SHANG Yuwei;ZHOU Shasha;LI Zhongyong;ZHANGXueying;XU Jizhong;LIANG Bowen(College of Horticulture,Hebei Agricultural University,Baoding 071000,Hebei China)

机构地区：[1]河北农业大学园艺学院,河北保定071000

出　　处：《果树学报》2023年第8期1572-1582,共11页Journal of Fruit Science

基　　金：河北省属高校基本科研业务费(KY2021054);河北省自然科学基金项目(C2021204158);国家现代农业产业技术体系资助项目(CARS-27);河北省重点研发计划项目(21326308D-02-03)。

摘　　要：【目的】探究外源褪黑素(melatonin,MT)对重茬胁迫下平邑甜茶(Malus hupehensis Rehd.)矿质元素吸收利用和生长的调控效应。【方法】以平邑甜茶实生苗为材料,采用盆栽试验,研究根施200μmol·L^(-1)褪黑素溶液对重茬胁迫下平邑甜茶幼苗根、茎和叶中10种矿质元素含量、吸收、转移积累及分配的影响。【结果】外源褪黑素提高了重茬胁迫下平邑甜茶植株各部分干生物量,改变了各部分元素的含量,并且显著提高了植株对大量元素和微量元素的吸收,提升了各元素在根茎叶中分布的比例。Mantel检验结果表明,平邑甜茶植株中各矿质元素与各部分干质量均呈正相关。【结论】重茬胁迫下外源施用200μmol·L^(-1)褪黑素不仅能调控矿质元素的吸收和积累,还能促进植株生长。【Objective】Apple replant disease(ARD) is a common soil-borne disease that decreases plant growth,increases damage by predatory insects,and decreases apple yield and quality.Current research on preventing and treating ARD mainly focuses on changes in the physical and chemical properties,metabolites,and microbial community structure of the rhizospheric soil.In contrast,few studies have focused on plant mineral nutrient absorption.In the present study,we investigated the effects of exogenous melatonin on the absorption,utilization,and accumulation of mineral elements in Malus hupehensis Rehd.under replant stress in order to provide a theoretical basis and technical support for the prevention and treatment of ARD.【Methods】In a pot experiment,400 healthy M.hupehensis seedlings were planted in June,2021 at the innovation experimental base of Hebei Agricultural University(38° 230 N,115° 280 E).The seedlings were divided into four groups:plants grown in'healthy'soil(CK);melatonin control,plants grown in'healthy'soil containing 200 μmol·L^(-1) melatonin(MCK),plants grown in'replant'soil(ST),and plants grown in'replant'soil containing 200 μmol·L^(-1) melatonin(MST).Melatonin(200 μmol·L^(-1)) was supplemented every 7 days from June to October,2021.The growth and mineral element contents of the seedlings were analyzed after 120 days of experienment.The indices included dry weight and mineral element concentration,absorption,transfer,accumulation,and distribution in roots,stems,and leaves.Finally,the Mantel test was used to analyze the correlation between the mineral element content and the dry weight in each part of the M.hupehensis seedlings.【Results】The exogenous melatonin significantly increased the dry weight of the roots,stems and leaves of M.hupehensis seedlings under replant stress compared with the ST plants,by 44.19%,67.63% and 81.67%,respectively.Additionally,the concentration of mineral elements differed significantly among treatments.Compared with the ST plants,the MST plants showed significan

关 键 词：平邑甜茶 褪黑素 重茬胁迫 养分吸收 

分 类 号：S661.1[农业科学—果树学]