Host plant height explains the effect of nitrogen enrichment on arbuscular mycorrhizal fungal communities

Author:

Cheng Yikang12ORCID,Rutten Gemma2ORCID,Liu Xiang3ORCID,Ma Miaojun3ORCID,Song Zhiping1ORCID,Maaroufi Nadia I.24ORCID,Zhou Shurong5ORCID

Affiliation:

1. Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering, Coastal Ecosystems Research Station of the Yangtze River Estuary, Institute of Biodiversity Science, School of Life Sciences Fudan University 2005 Songhu Road Shanghai 200438 China

2. Institute of Plant Sciences University of Bern 3013 Bern Switzerland

3. State Key Laboratory of Herbage Improvement and Grassland Agro‐ecosystems & College of Ecology Lanzhou University 222 Tianshui South Road Lanzhou 730000 China

4. Department of Soil and Environment Swedish University of Agricultural Sciences 75007 Uppsala Sweden

5. Key Laboratory of Genetics and Germplasm Innovation of Tropical Special Forest Trees and Ornamental Plants, Ministry of Education, College of Forestry Hainan University Haikou 570228 China

Abstract

Summary Nitrogen (N) enrichment is widely known to affect the root‐associated arbuscular mycorrhizal fungal (AMF) community in different ways, for example, via altering soil properties and/or shifting host plant functional structure. However, empirical knowledge of their relative importance is still lacking. Using a long‐term N addition experiment, we measured the AMF community taxonomic and phylogenetic diversity at the single plant species (roots of 15 plant species) and plant community (mixed roots) levels. We also measured four functional traits of 35 common plant species along the N addition gradient. We found divergent responses of AMF diversity to N addition for host plants with different innate heights (i.e. plant natural height under unfertilized treatment). Furthermore, our data showed that species‐specific responses of AMF diversity to N addition were negatively related to the change in maximum plant height. When scaling up to the community level, N addition affected AMF diversity mainly through increasing the maximum plant height, rather than altering soil properties. Our results highlight the importance of plant height in driving AMF community dynamics under N enrichment at both species and community levels, thus providing important implications for understanding the response of AMF diversity to anthropogenic N deposition.

Funder

National Natural Science Foundation of China

China Scholarship Council

Vetenskapsrådet

Publisher

Wiley

Subject

Plant Science,Physiology

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