Soil P availability and mycorrhizal type determine root exudation in sub-tropical forests

Jiang, Zheng; Thakur, Madhav P; Liu, Ruiqiang; Zhou, Guiyao; Zhou, Lingyan; Fu, Yuling; Zhang, Peipei; He, Yanghui; Shao, Junjiong; Gao, Jing; Li, Nan; Wang, Xinxin; Jia, Shuxian; Chen, Yang; Zhang, Chunxiu; Zhou, Xuhui (2022). Soil P availability and mycorrhizal type determine root exudation in sub-tropical forests. Soil Biology & Biochemistry, 171, p. 108722. Elsevier 10.1016/j.soilbio.2022.108722

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Root exudates determine plant’s ability to acquire nutrients through influencing plant’s interactions with soil microorganisms. Recent studies suggest that plant’s associations with beneficial soil microorganisms explain variation in root exudation as plants opt to minimize the exudation cost through such symbiosis. Yet, we have a poor understanding of whether plants change their exudation rates through mycorrhizal symbiosis in soil environments with varying resource availability. Here, we report the effects of plant-mycorrhizal symbiosis on root exudation rates across a gradient of soil phosphorous (P) availability from a field experiment in subtropical forests. Root exudation rates were higher in plants partnering with arbuscular mycorrhizal fungi than those with ectomycorrhizal fungi, but this difference disappeared in soils with high P. Specific root surface area, specific
root length and fine root vitality explained high root exudation in P-limited soils. These findings demonstrate that mycorrhizal symbiosis and root functional traits collectively determine the variation in root exudation in Plimited environments.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Department of Biology > Institute of Ecology and Evolution (IEE)
08 Faculty of Science > Department of Biology > Institute of Ecology and Evolution (IEE) > Terrestrial Ecology

UniBE Contributor:

Thakur, Madhav Prakash

Subjects:

500 Science > 570 Life sciences; biology

ISSN:

0038-0717

Publisher:

Elsevier

Language:

English

Submitter:

Susanne Holenstein

Date Deposited:

27 Jun 2022 15:39

Last Modified:

23 Dec 2022 09:29

Publisher DOI:

10.1016/j.soilbio.2022.108722

BORIS DOI:

10.48350/170954

URI:

https://boris.unibe.ch/id/eprint/170954

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