气候变化领域集成服务门户(CCPortal): Soil Microbiomes With the Genetic Capacity for Atmospheric Chemosynthesis Are Widespread Across the Poles and Are Associated With Moisture, Carbon, and Nitrogen Limitation

CCPortal

DOI	10.3389/fmicb.2020.01936
	Soil Microbiomes With the Genetic Capacity for Atmospheric Chemosynthesis Are Widespread Across the Poles and Are Associated With Moisture, Carbon, and Nitrogen Limitation
	Ray, Angelique E.; Zhang, Eden; Terauds, Aleks; Ji, Mukan; Kong, Weidong; Ferrari, Belinda C.
通讯作者	Ferrari, BC (通讯作者)
发表日期	2020
ISSN	1664-302X
卷号	11
英文摘要	Soil microbiomes within oligotrophic cold deserts are extraordinarily diverse. Increasingly, oligotrophic sites with low levels of phototrophic primary producers are reported, leading researchers to question their carbon and energy sources. A novel microbial carbon fixation process termed atmospheric chemosynthesis recently filled this gap as it was shown to be supporting primary production at two Eastern Antarctic deserts. Atmospheric chemosynthesis uses energy liberated from the oxidation of atmospheric hydrogen to drive the Calvin-Benson-Bassham (CBB) cycle through a new chemotrophic form of ribulose-1,5-bisphosphate carboxylase/oxygenase (RuBisCO), designated IE. Here, we propose that the genetic determinants of this process; RuBisCO type IE (rbcL1E) and high affinity group 1h-[NiFe]-hydrogenase (hhyL) are widespread across cold desert soils and that this process is linked to dry and nutrient-poor environments. We used quantitative PCR (qPCR) to quantify these genes in 122 soil microbiomes across the three poles; spanning the Tibetan Plateau, 10 Antarctic and three high Arctic sites. Both genes were ubiquitous, being present at variable abundances in all 122 soils examined (rbcL1E, 6.25 x 10(3)-1.66 x 10(9)copies/g soil;hhyL, 6.84 x 10(3)-5.07 x 10(8)copies/g soil). For the Antarctic and Arctic sites, random forest and correlation analysis against 26 measured soil physicochemical parameters revealed thatrbcL1EandhhyLgenes were associated with lower soil moisture, carbon and nitrogen content. While further studies are required to quantify the rates of trace gas carbon fixation and the organisms involved, we highlight the global potential of desert soil microbiomes to be supported by this new minimalistic mode of carbon fixation, particularly throughout dry oligotrophic environments, which encompass more than 35% of the Earth's surface.
关键词	WINDMILL ISLANDS DESERT ROCKS DIVERSITY BACTERIAL ECOLOGY POLAR MICROORGANISMS H-2 CYANOBACTERIA SEQUENCES
英文关键词	carbon fixation; atmospheric chemosynthesis; trace gases; photosynthesis; environmental drivers; quantitative PCR
语种	英语
WOS研究方向	Microbiology
WOS类目	Microbiology
WOS记录号	WOS:000565344200001
来源期刊	FRONTIERS IN MICROBIOLOGY
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/259822
推荐引用方式 GB/T 7714	Ray, Angelique E.,Zhang, Eden,Terauds, Aleks,et al. Soil Microbiomes With the Genetic Capacity for Atmospheric Chemosynthesis Are Widespread Across the Poles and Are Associated With Moisture, Carbon, and Nitrogen Limitation[J]. 中国科学院青藏高原研究所,2020,11.
APA	Ray, Angelique E.,Zhang, Eden,Terauds, Aleks,Ji, Mukan,Kong, Weidong,&Ferrari, Belinda C..(2020).Soil Microbiomes With the Genetic Capacity for Atmospheric Chemosynthesis Are Widespread Across the Poles and Are Associated With Moisture, Carbon, and Nitrogen Limitation.FRONTIERS IN MICROBIOLOGY,11.
MLA	Ray, Angelique E.,et al."Soil Microbiomes With the Genetic Capacity for Atmospheric Chemosynthesis Are Widespread Across the Poles and Are Associated With Moisture, Carbon, and Nitrogen Limitation".FRONTIERS IN MICROBIOLOGY 11(2020).