Arbuscular mycorrhizal fungal communities associated with two dominant species differ in their responses to long-term nitrogen addition in temperate grasslands

doi:10.1111/1365-2435.13081

	Arbuscular mycorrhizal fungal communities associated with two dominant species differ in their responses to long-term nitrogen addition in temperate grasslands
	Zheng, Zhi ; Ma, Pengfei ; Li, Juan ; Ren, Lifei ; Bai, Wenming; Tian, Qiuying ; Sun, Wei 4; Zhang, Wen-Hao
	2018
发表期刊	FUNCTIONAL ECOLOGY
ISSN	0269-8463
卷号	32 期号:6 页码:1575-1588
摘要	1. Arbuscular mycorrhizal (AM) fungi are important components of grassland ecosystems and are sensitive to enhanced atmospheric nitrogen (N) deposition. Enhanced N deposition has been widely reported to reduce species richness and alter species composition across different types of grasslands world-wide. Despite extensive studies on effects of N deposition on AM fungal communities of grasslands, few studies have specifically focused on effects of N deposition on AM fungi associated with dominant species in grasslands. 2. We investigated long-term (12-year) effects of N addition (80kgha(-1)year(-1)) on AM fungal community richness in roots and rhizosphere biomass of two dominant plant species (forb Artemisia frigida and grass Stipa krylovii) in temperate steppes of northern China. 3. We found that AM fungi associated with the two dominant plant species differed in their responses to N addition. Nitrogen addition led to a significant reduction in AM fungal richness colonized in roots, and biomass in the rhizosphere of A.frigida, while N addition had little impacts on AM fungi colonized in roots and rhizosphere of S.krylovii. Nitrogen addition significantly reduced AM fungal colonization in roots and AM fungal spore density in the rhizosphere soils of A.frigida. In contrast, N addition had no effect on AM fungal colonization in roots and spore density in the rhizosphere of S.krylovii. Nitrogen addition markedly suppressed photosynthetic rates in A.frigida due to excessive foliar accumulation of manganese. The N-induced reduction in photosynthetic rates reduced allocation of C into roots in A.frigida, leading to a lower root/shoot ratio, and suppression of AM fungal community associated with A.frigida. The inhibition of AM fungi would render A.frigida less competitive in terms of acquisition of mineral nutrients in soils, thus contributing to its loss in the steppe community under conditions of elevated N deposition. 4. These findings provide a mechanistic explanation for N-evoked differential responses of AM fungal communities associated with A.frigida and S.krylovii by linking soil properties and host plants to AM fungal communities.
关键词	arbuscular mycorrhizal fungi Artemisia frigida carbon allocation nitrogen enrichment photosynthetic rates soil acidification soil manganese and iron Stipa krylovii
学科领域	Ecology
DOI	10.1111/1365-2435.13081
收录类别	SCI
语种	英语
WOS关键词	ROOT COLONIZATION ; GLOBAL ASSESSMENT ; PLANT DIVERSITY ; FATTY-ACIDS ; DEPOSITION ; CARBON ; STEPPE ; FERTILIZATION ; ENRICHMENT ; AVAILABILITY
WOS记录号	WOS:000435442500014
出版者	WILEY
文献子类	Article
出版地	HOBOKEN
EISSN	1365-2435
资助机构	Ministry of Science Technology [2014FY210300] ; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [31470466, 31570403]
作者邮箱	whzhang@ibcas.ac.cn
引用统计	被引频次：40[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ibcas.ac.cn/handle/2S10CLM1/20659
专题	植被与环境变化国家重点实验室
作者单位	1.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing, Peoples R China 2.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing, Peoples R China 3.Chinese Acad Sci, Beijing Inst Life Sci, Res Network Global Change Biol, Beijing, Peoples R China 4.Chinese Acad Sci, Inner Mongolia Res Ctr Prataculture, Beijing, Peoples R China 5.Northeast Normal Univ, Inst Grassland Sci, Key Lab Vegetat Ecol, Minist Educ, Changchun, Jilin, Peoples R China
推荐引用方式 GB/T 7714	Zheng, Zhi,Ma, Pengfei,Li, Juan,et al. Arbuscular mycorrhizal fungal communities associated with two dominant species differ in their responses to long-term nitrogen addition in temperate grasslands[J]. FUNCTIONAL ECOLOGY,2018,32(6):1575-1588.
APA	Zheng, Zhi.,Ma, Pengfei.,Li, Juan.,Ren, Lifei.,Bai, Wenming.,...&Zhang, Wen-Hao.(2018).Arbuscular mycorrhizal fungal communities associated with two dominant species differ in their responses to long-term nitrogen addition in temperate grasslands.FUNCTIONAL ECOLOGY,32(6),1575-1588.
MLA	Zheng, Zhi,et al."Arbuscular mycorrhizal fungal communities associated with two dominant species differ in their responses to long-term nitrogen addition in temperate grasslands".FUNCTIONAL ECOLOGY 32.6(2018):1575-1588.

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