Different sexual impacts of dioecious Populus euphratica on microbial communities and nitrogen cycle processes in natural forests

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Guo , Q , Liu , J , Yu , L , Korpelainen , H & Li , C 2021 , ' Different sexual impacts of dioecious Populus euphratica on microbial communities and nitrogen cycle processes in natural forests ' , Forest Ecology and Management , vol. 496 , 119403 . https://doi.org/10.1016/j.foreco.2021.119403

Title: Different sexual impacts of dioecious Populus euphratica on microbial communities and nitrogen cycle processes in natural forests
Author: Guo, Qingxue; Liu, Jiantong; Yu, Lei; Korpelainen, Helena; Li, Chunyang
Contributor organization: Department of Agricultural Sciences
Viikki Plant Science Centre (ViPS)
Population Genetics and Biodiversity Group
Plant Production Sciences
Date: 2021-09-15
Language: eng
Number of pages: 9
Belongs to series: Forest Ecology and Management
ISSN: 0378-1127
DOI: https://doi.org/10.1016/j.foreco.2021.119403
URI: http://hdl.handle.net/10138/344139
Abstract: Plant-soil microbe interactions are determined by plant characters. Sexual dimorphism in root development, nitrogen (N) assimilation and resource allocation have been studied in different environments. However, how dioecious plants affect soil microbial communities in natural forests, particularly in low precipitation regions, is still poorly known. In this study, natural Populus euphratica forests were investigated in three arid regions. We hypothesized that males and females impose sex-specific impacts on physiochemical traits of soil, microbial communities and N-cycling processes. We discovered only little sex effect on most physiochemical traits, and bacterial and fungal communities in top soil (0-20 cm) in the three studied forests. However, the sex effect was greater in deep soil. Compared with fungi, the structure and composition of bacterial communities were affected more by plant sex in the rhizosphere and bulk soil. Sex indirectly affected N-cycling processes through a negative impact on the soil water content. Expressions of AOA, AOB, nifH, nirS and nirK in the rhizosphere soil were significantly affected by sex, forest site and their interactions. Proteobacteria, Actinobacteria and Firmicutes in the rhizosphere and bulk soils of P. euphratica males showed more significant effects on ammoxidation, N fixation, denitrification and protease activities when compared to females. The results suggest that sexual differences in shaping bacterial communities and affecting N-cycling processes are greater when the soil becomes drier. Thus, low precipitation causes intense sex differences in the nitrogen uptake and use efficiency. Our study highlights the importance of sexual effects on shaping specific microbial communities and N-cycling processes.
Subject: Sexual dimorphism
Plant-microbe interaction
Water availability
Nitrogen use efficiency
SPECIES RICHNESS
SOIL BACTERIAL
PLANT TRAITS
CATHAYANA
GROWTH
COMPETITION
11831 Plant biology
Peer reviewed: Yes
Rights: cc_by_nc_nd
Usage restriction: openAccess
Self-archived version: acceptedVersion


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