globalchange  > 气候变化与战略
DOI: 10.1073/pnas.2001613117
论文题名:
Mechanism of water extraction from gypsum rock by desert colonizing microorganisms
作者: Huang W.; Ertekin E.; Wang T.; Cruz L.; Dailey M.; DiRuggiero J.; Kisailus D.
刊名: Proceedings of the National Academy of Sciences of the United States of America
ISSN: 0027-8424
出版年: 2020
卷: 117, 期:20
起始页码: 10681
结束页码: 10687
语种: 英语
英文关键词: Anhydrite ; Gypsum ; Microorganisms ; Phase transformation ; Water extraction
Scopus关键词: calcium sulfate ; nanocrystal ; water ; acid anhydride ; calcium sulfate ; water ; Article ; bacterium isolate ; biofilm ; chemical parameters ; Chile ; controlled study ; crystallization ; cyanobacterium ; desert ; dissolution ; energy ; extraction ; gypsum rock ; microbial colonization ; nonhuman ; phase transformation ; precipitation ; priority journal ; rock ; surface energy ; validation process ; adaptation ; extreme environment ; metabolism ; physiology ; Adaptation, Physiological ; Anhydrides ; Biofilms ; Calcium Sulfate ; Cyanobacteria ; Extreme Environments ; Water
英文摘要: Microorganisms, in the most hyperarid deserts around the world, inhabit the inside of rocks as a survival strategy. Water is essential for life, and the ability of a rock substrate to retain water is essential for its habitability. Here we report the mechanism by which gypsum rocks from the Atacama Desert, Chile, provide water for its colonizing microorganisms. We show that the microorganisms can extract water of crystallization (i.e., structurally ordered) from the rock, inducing a phase transformation from gypsum (CaSO4·2H2O) to anhydrite (CaSO4). To investigate and validate the water extraction and phase transformation mechanisms found in the natural geological environment, we cultivated a cyanobacterium isolate on gypsum rock samples under controlled conditions. We found that the cyanobacteria attached onto high surface energy crystal planes ({011}) of gypsum samples generate a thin biofilm that induced mineral dissolution accompanied by water extraction. This process led to a phase transformation to an anhydrous calcium sulfate, anhydrite, which was formed via reprecipitation and subsequent attachment and alignment of nanocrystals. Results in this work not only shed light on how microorganisms can obtain water under severe xeric conditions but also provide insights into potential life in even more extreme environments, such as Mars, as well as offering strategies for advanced water storage methods. © 2020 National Academy of Sciences. All rights reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/163464
Appears in Collections:气候变化与战略

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作者单位: Huang, W., Department of Chemical and Environmental Engineering, University of California, Riverside, CA 92521, United States; Ertekin, E., Department of Biology, Johns Hopkins University, Baltimore, MD 21218, United States; Wang, T., Materials Science and Engineering Program, University of California, Riverside, CA 92521, United States; Cruz, L., Materials Science and Engineering Program, University of California, Riverside, CA 92521, United States; Dailey, M., Department of Biology, Johns Hopkins University, Baltimore, MD 21218, United States; DiRuggiero, J., Department of Biology, Johns Hopkins University, Baltimore, MD 21218, United States; Kisailus, D., Department of Chemical and Environmental Engineering, University of California, Riverside, CA 92521, United States, Materials Science and Engineering Program, University of California, Riverside, CA 92521, United States, Department of Materials Science and Engineering, University of California, Irvine, CA 92697, United States

Recommended Citation:
Huang W.,Ertekin E.,Wang T.,et al. Mechanism of water extraction from gypsum rock by desert colonizing microorganisms[J]. Proceedings of the National Academy of Sciences of the United States of America,2020-01-01,117(20)
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