干旱区生态环境知识资源中心(Arid): An ecophysiological explanation for manganese enrichment in rock varnish

Arid

DOI	10.1073/pnas.2025188118
	An ecophysiological explanation for manganese enrichment in rock varnish
	Lingappa, Usha F.; Yeager, Chris M.; Sharma, Ajay; Lanza, Nina L.; Morales, Demosthenes P.; Xie, Gary; Atencio, Ashley D.; Chadwick, Grayson L.; Monteverde, Danielle R.; Magyar, John S.; Webb, Samuel M.; Valentine, Joan Selverstone; Hoffman, Brian M.; Fischer, Woodward W.
通讯作者	Lingappa, UF ; Magyar, JS (corresponding author), CALTECH, Div Geol & Planetary Sci, Pasadena, CA 91125 USA. ; Magyar, JS (corresponding author), Univ Calif Los Angeles, Dept Chem & Biochem, Los Angeles, CA 90095 USA.
来源期刊	PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
ISSN	0027-8424
出版年	2021
卷号	118 期号:25
英文摘要	Desert varnish is a dark rock coating that forms in arid environments worldwide. It is highly and selectively enriched in manganese, the mechanism for which has been a long-standing geological mystery. We collected varnish samples from diverse sites across the western United States, examined them in petrographic thin section using microscale chemical imaging techniques, and investigated the associated microbial communities using 16S amplicon and shotgun metagenomic DNA sequencing. Our analyses described a material governed by sunlight, water, and manganese redox cycling that hosts an unusually aerobic microbial ecosystem characterized by a remarkable abundance of photosynthetic Cyanobacteria in the genus Chroococcidiopsis as the major autotrophic constituent. We then showed that diverse Cyanobacteria, including the relevant Chroococcidiopsis taxon, accumulate extraordinary amounts of intracellular manganese-over two orders of magnitude higher manganese content than other cells. The speciation of this manganese determined by advanced paramagnetic resonance techniques suggested that the Cyanobacteria use it as a catalytic antioxidant-a valuable adaptation for coping with the substantial oxidative stress present in this environment. Taken together, these results indicated that the manganese enrichment in varnish is related to its specific uptake and use by likely founding members of varnish microbial communities.
英文关键词	rock varnish desert varnish Cyanobacteria manganese oxidative
类型	Article
语种	英语
开放获取类型	Green Accepted, hybrid, Green Published
收录类别	SCI-E
WOS记录号	WOS:000675808200001
WOS关键词	INDUCED BREAKDOWN SPECTROSCOPY ; DESERT VARNISH ; RADIATION-RESISTANCE ; DEINOCOCCUS-RADIODURANS ; SEQUENCE ALIGNMENT ; GAMMA-RADIATION ; NEGEV DESERT ; OXIDE ; PLEISTOCENE ; CYANOBACTERIUM
WOS类目	Multidisciplinary Sciences
WOS研究方向	Science & Technology - Other Topics
来源机构	University of California, Los Angeles
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/364418
作者单位	[Lingappa, Usha F.; Chadwick, Grayson L.; Monteverde, Danielle R.; Magyar, John S.; Valentine, Joan Selverstone; Fischer, Woodward W.] CALTECH, Div Geol & Planetary Sci, Pasadena, CA 91125 USA; [Yeager, Chris M.; Lanza, Nina L.; Morales, Demosthenes P.; Xie, Gary; Atencio, Ashley D.] Los Alamos Natl Lab, Los Alamos, NM USA; [Sharma, Ajay; Hoffman, Brian M.] Northwestern Univ, Dept Chem, Evanston, IL 60208 USA; [Webb, Samuel M.] Stanford Univ, Stanford Synchrotron Radiat Lightsource, Menlo Pk, CA 94025 USA; [Magyar, John S.; Valentine, Joan Selverstone] Univ Calif Los Angeles, Dept Chem & Biochem, Los Angeles, CA 90095 USA
推荐引用方式 GB/T 7714	Lingappa, Usha F.,Yeager, Chris M.,Sharma, Ajay,et al. An ecophysiological explanation for manganese enrichment in rock varnish[J]. University of California, Los Angeles,2021,118(25).
APA	Lingappa, Usha F..,Yeager, Chris M..,Sharma, Ajay.,Lanza, Nina L..,Morales, Demosthenes P..,...&Fischer, Woodward W..(2021).An ecophysiological explanation for manganese enrichment in rock varnish.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,118(25).
MLA	Lingappa, Usha F.,et al."An ecophysiological explanation for manganese enrichment in rock varnish".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 118.25(2021).