Arbuscular mycorrhiza maintains nodule function during external NH (4) (+) supply in Phaseolus vulgaris (L.)

doi:10.1007/s00572-011-0396-9

	Arbuscular mycorrhiza maintains nodule function during external NH (4) (+) supply in Phaseolus vulgaris (L.)
	Mortimer, Peter E.3,4; Perez-Fernandez, Maria A.2; Valentine, Alex J.1
通讯作者	Valentine, A (reprint author), Univ Stellenbosch, Dept Bot & Zool, Fac Sci, Private Bag X1, ZA-7602 Western Cape, South Africa, alexvalentine@mac.com
	2012-04-01
发表期刊	MYCORRHIZA
ISSN	0940-6360
卷号	22 期号:3 页码:237-245
摘要	The synergistic benefits of the dual inoculation of legumes with nodule bacteria and arbuscular mycorrhizae (AM) are well established, but the effect of an external NH (4) (+) supply on this tripartite relationship is less clear. This effect of NH (4) (+) supply was investigated with regards to the growth and function of the legume host and both symbionts. Nodulated Phaseolus vulgaris seedlings with and without AM, were grown in a sand medium with either 0 N, 1 mM or 3 mM NH (4) (+) . Plants were harvested at 30 days after emergence and measurements were taken for biomass, N-2 fixation, photosynthesis, asparagine concentration, construction costs and N nutrition. The addition of NH (4) (+) led to a decline in the percentage AM colonization and nodule dry weights, although AM colonization was affected to a lesser extent. NH (4) (+) supply also resulted in a decrease in the reliance on biological nitrogen fixation (BNF); however, the AM roots maintained higher levels of NH (4) (+) uptake than their non-AM counterparts. Furthermore, the non-AM plants had a higher production of asparagine than the AM plants. The inhibitory effects of NH (4) (+) on nodule function can be reduced by the presence of AM at moderate levels of NH (4) (+) (1 mM), via improving nodule growth or relieving the asparagine-induced inhibition of BNF.
关键词	Arbuscular Mycorrhiza Nh4++ Nitrogen Fixation Photosynthesis Asparagines
学科领域	Mycology
DOI	10.1007/s00572-011-0396-9
收录类别	SCI
语种	英语
WOS记录号	WOS:000301586200008
引用统计
文献类型	期刊论文
条目标识符	http://ir.kib.ac.cn/handle/151853/10501
专题	资源植物与生物技术所级重点实验室
作者单位	1.Univ Stellenbosch, Dept Bot & Zool, Fac Sci, ZA-7602 Western Cape, South Africa 2.Univ Pablo de Olavide, Area Ecol, Fac Ciencias Expt, Seville 41013, Spain 3.Chinese Acad Sci, Key Lab Econ Plants & Biotechnol, Kunming Inst Bot, Kunming 650204, Peoples R China 4.Kunming Inst Bot, CMES, Kunming 650204, Yunnan, Peoples R China
推荐引用方式 GB/T 7714	Mortimer, Peter E.,Perez-Fernandez, Maria A.,Valentine, Alex J.. Arbuscular mycorrhiza maintains nodule function during external NH (4) (+) supply in Phaseolus vulgaris (L.)[J]. MYCORRHIZA,2012,22(3):237-245.
APA	Mortimer, Peter E.,Perez-Fernandez, Maria A.,&Valentine, Alex J..(2012).Arbuscular mycorrhiza maintains nodule function during external NH (4) (+) supply in Phaseolus vulgaris (L.).MYCORRHIZA,22(3),237-245.
MLA	Mortimer, Peter E.,et al."Arbuscular mycorrhiza maintains nodule function during external NH (4) (+) supply in Phaseolus vulgaris (L.)".MYCORRHIZA 22.3(2012):237-245.

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