Arbuscular mycorrhizal fungi alleviate arsenic toxicity to Medicago sativa by influencing arsenic speciation and partitioning

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	Arbuscular mycorrhizal fungi alleviate arsenic toxicity to Medicago sativa by influencing arsenic speciation and partitioning
	Chen, Baodong; Li, Jinglong; Sun, Yuqing; Jiang, Xuelian; Zhang, Xin
刊名	ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
	2018-08-15
卷号	157 页码:235-243
关键词	Arbuscular mycorrhiza Medicago sativa P acquisition As speciation As partitioning Gene expression
ISSN号	0147-6513
文献子类	Article
英文摘要	In a pot experiment, Medicago saliva inoculated with/without arbuscular mycorrhizal (AM) fungus Rhizophagus irregularis were grown in four levels (0, 10, 25, and 75 mg/kg) of arsenic (As)-polluted soil to investigate the influences of AM symbiosis on plant As tolerance. The results showed that mycorrhizal inoculation significantly increased plant biomass, while As addition decreased mycorrhizal colonization and hyphal length density. Mycorrhizal inoculation dramatically improved plant phosphorus (P) nutrition, restricted As uptake and retained more As in roots by upregulating the expression of the AM-induced P transporter gene MsPT4 and the metallothionein gene MsMT2. High soil As content downregulated MsPT4 expression. Dimethylarsenic acid (DMA) was detected only in the shoots of mycorrhizal plants, indicating that AM fungi likely play an essential role in As detoxification by biological methylation. The present investigation allowed deeper insights into the As detoxification mechanisms of AM associations and demonstrated the important role of AM fungi in plant resistance under As-contaminated conditions.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/40464]
专题	生态环境研究中心_城市与区域生态国家重点实验室
推荐引用方式 GB/T 7714	Chen, Baodong,Li, Jinglong,Sun, Yuqing,et al. Arbuscular mycorrhizal fungi alleviate arsenic toxicity to Medicago sativa by influencing arsenic speciation and partitioning[J]. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY,2018,157:235-243.
APA	Chen, Baodong,Li, Jinglong,Sun, Yuqing,Jiang, Xuelian,&Zhang, Xin.(2018).Arbuscular mycorrhizal fungi alleviate arsenic toxicity to Medicago sativa by influencing arsenic speciation and partitioning.ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY,157,235-243.
MLA	Chen, Baodong,et al."Arbuscular mycorrhizal fungi alleviate arsenic toxicity to Medicago sativa by influencing arsenic speciation and partitioning".ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 157(2018):235-243.