The arbuscular mycorrhizal fungus Glomus mosseae can enhance arsenic tolerance in Medicago truncatula by increasing plant phosphorus status and restricting arsenate uptake

被引：64
|
作者：
Xu, Pengliang [1 ]
Christie, Peter [1 ,2 ]
Liu, Yu [1 ]
Zhang, Junling [1 ]
Li, Xiaolin [1 ]
机构：
[1] China Agr Univ, Coll Resources & Environm Sci, Minist Educ, Key Lab Plant Soil Interact, Beijing 100094, Peoples R China
[2] Queens Univ Belfast, Dept Agr & Environm Sci, Belfast BT9 5PX, Antrim, North Ireland
来源：
ENVIRONMENTAL POLLUTION | 2008年 / 156卷 / 01期
基金：
中国国家自然科学基金;
关键词：
Arbuscular mycorrhiza; Arsenate; Glomus mosseae; Medicago truncatula; Phosphate uptake;
D O I：
10.1016/j.envpol.2008.01.003
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
A pot experiment examined the biomass and As uptake of Medicago truncatula colonized by the arbuscular mycorrhizal (AM) fungus Glomus mosseae in low-P soil experimentally contaminated with different levels of arsenate. The biomass of G. mosseae external mycelium was unaffected by the highest addition level of As studied (200 mg kg(-1)) but shoot and root biomass declined in both mycorrhizal and non-mycorrhizal plants, indicating that the AM fungus was more tolerant than M. truncatula to arsenate. Mycorrhizal inoculation increased shoot and root dry weights by enhancing host plant P nutrition and lowering shoot and root As concentrations compared with uninoculated plants. The AM fungus may have been highly tolerant to As and conferred enhanced tolerance to arsenate on the host plant by enhancing P nutrition and restricting root As uptake. (c) 2008 Elsevier Ltd. All rights reserved.
引用
收藏
页码：215 / 220
页数：6
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