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Volume 12
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10.3390/microorganisms12091752
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Article

The Response of Rhizosphere Microbial C and N-Cycling Gene Abundance of Sand-Fixing Shrub to Stand Age Following Desert Restoration

by
Yunfei Li
1,2,3,†,
Bingyao Wang
1,†,
Zhanjun Wang
4,
Wenqiang He
1,2,3,
Yanli Wang
5,
Lichao Liu
1 and
Haotian Yang
1,2,*
1
Key Laboratory of Ecological Safety and Sustainable Development in Arid Lands, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China
2
Shapotou Desert Research and Experiment Station, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China
3
University of Chinese Academy of Sciences, Beijing 101408, China
4
Institute of Desertification Control, Ningxia Academy of Agricultural and Forestry Sciences, Yinchuan 750002, China
5
College of Forestry, Gansu Agricultural University, Lanzhou 730070, China
*
Author to whom correspondence should be addressed.
†
These authors contributed equally to this work.
Microorganisms 2024, 12(9), 1752; https://doi.org/10.3390/microorganisms12091752
Submission received: 1 August 2024 / Revised: 19 August 2024 / Accepted: 19 August 2024 / Published: 23 August 2024
(This article belongs to the Section Plant Microbe Interactions)
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Abstract

Rhizosphere microorganisms play a pivotal role in biogeochemical cycles, particularly in relation to carbon (C) and nitrogen (N) cycles. However, the impact of stand age on the composition of rhizosphere microbial communities and the abundance involved in C and N cycling remains largely unexplored in restoration ecosystems dominated by shrubs of temperate deserts. This study focuses on revealing changes in microbial composition and functional genes in the rhizosphere soil of Caragana korshinskii after revegetation, as well as their response mechanisms to changes in environmental factors. The alpha diversity of bacteria tended to increase with stand age, whereas that of fungi decreased. The abundance of denitrification; dissimilatory nitrate reduction to ammonium, nitrification, and ammonium assimilation; and C fixation-related gene levels increased with stand age, whereas those related to the degradation of starch, pectin, hemicellulose, cellulose, and aromatics decreased. The parameters MBC, MBN, and TC were the key factors affecting the bacterial community, whereas the fungal community was regulated by TN, EC, pH, and MBC. Stand age indirectly regulated C and N cycling functions of genes through altered soil properties and microbial community structures. This study presents a novel approach to accurately evaluate the C and N cycling dynamics within ecosystems at various stages of restoration.
Keywords: desert ecosystem; soil microbial community; functional genes; C and N cycling; rhizosphere soil desert ecosystem; soil microbial community; functional genes; C and N cycling; rhizosphere soil

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MDPI and ACS Style

Li, Y.; Wang, B.; Wang, Z.; He, W.; Wang, Y.; Liu, L.; Yang, H. The Response of Rhizosphere Microbial C and N-Cycling Gene Abundance of Sand-Fixing Shrub to Stand Age Following Desert Restoration. Microorganisms 2024, 12, 1752. https://doi.org/10.3390/microorganisms12091752

AMA Style

Li Y, Wang B, Wang Z, He W, Wang Y, Liu L, Yang H. The Response of Rhizosphere Microbial C and N-Cycling Gene Abundance of Sand-Fixing Shrub to Stand Age Following Desert Restoration. Microorganisms. 2024; 12(9):1752. https://doi.org/10.3390/microorganisms12091752

Chicago/Turabian Style

Li, Yunfei, Bingyao Wang, Zhanjun Wang, Wenqiang He, Yanli Wang, Lichao Liu, and Haotian Yang. 2024. "The Response of Rhizosphere Microbial C and N-Cycling Gene Abundance of Sand-Fixing Shrub to Stand Age Following Desert Restoration" Microorganisms 12, no. 9: 1752. https://doi.org/10.3390/microorganisms12091752

APA Style

Li, Y., Wang, B., Wang, Z., He, W., Wang, Y., Liu, L., & Yang, H. (2024). The Response of Rhizosphere Microbial C and N-Cycling Gene Abundance of Sand-Fixing Shrub to Stand Age Following Desert Restoration. Microorganisms, 12(9), 1752. https://doi.org/10.3390/microorganisms12091752

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