砷污染后接种丛枝菌根真菌对番茄全生育期磷砷吸收的影响

摘要

为进一步了解丛枝菌根真菌接种植物吸收磷和砷的相互关系，进而为利用生物手段有效降低砷对植物的污染提供理论依据，采用双因素随机区组设计研究砷污染条件下盆栽番茄接种丛枝菌根真菌后，其全生育期对磷和砷的吸收规律。结果表明：番茄植株地上部的磷砷比显著高于其根部的磷砷比；接种菌根真菌 Glomus mosseae 的番茄单株总磷砷比高于非菌根番茄单株，即，番茄接种菌根真菌在遭受砷胁迫时可在一定程度上表现出积极的防御和屏障作用。非菌根番茄和接种番茄植株各自含砷量和含磷量随生育期变化而变化的趋势不完全一致。%The P and As absorption law of tomato plants inoculated with arbuscular mycorrhizal fungi (G.mosseae)was studied under As pollution condition by double-factor randomized block design to further understand the correlation between P and As absorption and to provide the theoretical basis for effectively reducing As pollution by using the biological method.The P-As ratio of the over-ground part is higher than the roots significantly.Total P-As ratio per tomato plant inoculated with G.mosseae is higher than the tomato plant without G.mosseae,which indicates that tomato plants inoculated with G.mosseae can play a positive defense and barrier role under As stress to some extent.The As and P content in tomato plants inoculated with G.mosseae and without G.mosseae changes at different growth stages,but the variance trend of As and P content is not the same between tomato plants inoculated with G.mosseae and tomato plants without G.mosseae.