干旱区生态环境知识资源中心(Arid): Rhizosphere effect alters the soil microbiome composition and C, N transformation in an arid ecosystem

Arid

DOI	10.1016/j.apsoil.2021.104296
	Rhizosphere effect alters the soil microbiome composition and C, N transformation in an arid ecosystem
	Li, Wenjing; Li, Yan; Lv, Jie; He, Xuemin; Wang, Jinlong; Teng, Dexiong; Jiang, Lamei; Wang, Hengfang; Lv, Guanghui
通讯作者	Lv, GH (corresponding author), Xinjiang Univ, Coll Resources & Environm Sci, Key Lab Oasis Ecol, Educ Minist, 666 Shengli Rd, Urumqi 830046, Xinjiang, Peoples R China.
来源期刊	APPLIED SOIL ECOLOGY
ISSN	0929-1393
EISSN	1873-0272
出版年	2022
卷号	170
英文摘要	Plants exert positive selection effect on rhizosphere microbes by influencing the nutrient conditions of the rhizosphere microenvironment, thereby changing the soil microbial structure and ecological function. In arid regions, water is the major limiting factor affecting the microbial activity and nutrient conversion. However, the effects of soil water availability on the ecological strategies and the C, N functional metabolism of desert mi-croorganisms remain unclear. We hypothesized that soil water availability and rhizosphere effect might alter the strategy for soil C, N utilization in the arid regions. To test the hypothesis, rhizosphere and bulk soil along a gradient of soil water availability in a dry area of northwestern China were analyzed. The soil samples were collected from Reaumuria songarica, Nitraria tangutorum, and Alhagi sparsifolia and were subjected to meta-genomic sequencing with a HiSeq system. The relative abundance of Gemmatimonas and Gemmatirosa increased with the increased soil water content, whereas the relative abundance of Microvirga and Nocardioides was decreased. The relative abundance of Azospirillum and Bradyrhizobium did not change with the water content as these microbial communities use limited-water, are drought-tolerant, and use inert strategies to adapt to different levels of water availability. The genes encoding ribulose 1,5-bisphosphate carboxylase/oxygenase (RuBisCO) were more abundantly expressed in low water than in high to medium water availability (P < 0.05). The abundance of nitrate reduction genes decreased significantly with the increase in soil water availability, whereas that of denitrification genes increased. The relative abundance of the dissimilatory nitrate reduction process in the rhizosphere soil (44.83%) was significantly higher than that in the bulk soil (39.21%). It can be inferred that soil microorganisms adopt the nitrogen utilization strategy by increasing the ammonium nitrogen to mitigate reduced water availability and provide a nitrogen-rich environment to plant roots.
英文关键词	Soil water availability Rhizosphere effect Microbial community composition Carbon and nitrogen metabolism Ecological strategies
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000718047700014
WOS关键词	BIOLOGICAL NITRIFICATION INHIBITION ; ROOT-ASSOCIATED MICROORGANISMS ; DRYLAND ECOSYSTEMS ; DESERT ; RESPONSES ; DROUGHT ; COMMUNITIES ; BACTERIAL ; PRECIPITATION ; DYNAMICS
WOS类目	Soil Science
WOS研究方向	Agriculture
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/374541
作者单位	[Li, Wenjing; Li, Yan; Lv, Jie; He, Xuemin; Wang, Jinlong; Teng, Dexiong; Jiang, Lamei; Wang, Hengfang; Lv, Guanghui] Xinjiang Univ, Coll Resources & Environm Sci, Urumqi, Xinjiang, Peoples R China; [Li, Wenjing; Li, Yan; Lv, Jie; He, Xuemin; Wang, Jinlong; Teng, Dexiong; Jiang, Lamei; Wang, Hengfang; Lv, Guanghui] Xinjiang Univ, Key Lab Oasis Ecol, Minist Educ, Urumqi, Xinjiang, Peoples R China
推荐引用方式 GB/T 7714	Li, Wenjing,Li, Yan,Lv, Jie,et al. Rhizosphere effect alters the soil microbiome composition and C, N transformation in an arid ecosystem[J],2022,170.
APA	Li, Wenjing.,Li, Yan.,Lv, Jie.,He, Xuemin.,Wang, Jinlong.,...&Lv, Guanghui.(2022).Rhizosphere effect alters the soil microbiome composition and C, N transformation in an arid ecosystem.APPLIED SOIL ECOLOGY,170.
MLA	Li, Wenjing,et al."Rhizosphere effect alters the soil microbiome composition and C, N transformation in an arid ecosystem".APPLIED SOIL ECOLOGY 170(2022).