铝胁迫对四种苜蓿属植物种子萌发及幼苗生长的影响

打开文本图片集

中图分类号：S541 文献标识码：A

文章编号：0439-8114（2025）12-0170-05

DOI：10.14088/j.cnki.issn0439-8114.2025.12.029 开放科学（资源服务）标识码（OSID）：

Effects of aluminum stress on seed germinationand seedling growth of four Medicago species

XIONG Jun-bo，ZHANG He-shan，TIAN Hong，LU Jiao-yun，WU Xin-jiang，LIU Yang （InstituteofAnimalandVeterinary Science，HubeiAcademyof Agricultural Science，Wuhan 43Oo64，China）

Abstract：TocomparethephysiologicalresponsesofdiferentMedicagospeciestoaluminum（Al）stressandidentifygermplasmwith strong Al tolerance，four species M polymorpha，M.lupulina，M.minima，andM.sativa were subjected to Als+ concentrations of 0 50，100，and 150μmol/L .Germination rate，root and shoot dry weights，Al content，and antioxidant enzyme activities were measured.Al stress significantly inhibited seed germinationand seedling growth in all species（ P <0.05），with rootbiomass showing the largestreductionindicatingthatotsweretheprmarytargetofltoxicity.M.polymorphehbitedthehghestAltolerance，ai taining highergerminationrate，biomass，andantioxidantenzymeactivitiesandlowerAlaccumulationand malondialdehyde（MDA） content.CorelatinaalysisvealedsigiicantnegativeelationshipsetenAlontentandgrowhprameters，uggestingtate ducedAl accumulationand enhancedantioxidant defense contribute toAl tolerance.These findings highlighted M polymorphaasa promising species forimproving Altolerance in Medicago breeding andforcultivation inacidic soils insouthern China. Key words：Medicago polymorpha;aluminum stress；antioxidant enzyme;aluminum tolerance;physiologicalresponse

苜蓿属植物中的紫花苜蓿（Medicagosativa）是全球种植面积最广、经济价值最高的多年生豆科牧草，在饲料生产、土壤改良与生态修复等方面发挥着重要作用。（剩余7844字）