干旱区生态环境知识资源中心(Arid): Sub-lithic photosynthesis in hot desert habitats

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DOI	10.1111/1462-2920.15505
	Sub-lithic photosynthesis in hot desert habitats
	Gwizdala, Michal; Lebre, Pedro H.; Maggs-Kolling, Gillian; Marais, Eugene; Cowan, Don A.; Kruger, Tjaart P. J.
通讯作者	Gwizdala, M (corresponding author), Univ Pretoria, Dept Phys, Lynnwood Rd, ZA-0002 Pretoria, South Africa. ; Gwizdala, M (corresponding author), Univ Pretoria, Forestry & Agr Biotechnol Inst FABI, Lynnwood Rd, ZA-0002 Pretoria, South Africa.
来源期刊	ENVIRONMENTAL MICROBIOLOGY
ISSN	1462-2912
EISSN	1462-2920
出版年	2021-04
英文摘要	In hyper-arid soil environments, photosynthetic microorganisms are largely restricted to hypolithic (sub-lithic) habitats: i.e., on the ventral surfaces of translucent pebbles in desert pavements. Here, we combined fluorometric, spectroscopic, biochemical and metagenomic approaches to investigate in situ the light transmission properties of quartz stones in the Namib Desert, and assess the photosynthetic activity of the underlying hypolithic cyanobacterial biofilms. Quartz pebbles greatly reduced the total photon flux to the ventral surface biofilms and filtered out primarily the short wavelength portion of the solar spectrum. Chlorophylls d and f were not detected in biofilm pigment extracts; however, hypolithic cyanobacterial communities showed some evidence of adaptation to sub-lithic conditions, including the prevalence of genes encoding Helical Carotenoid Proteins, which are associated with desiccation stress. Under water-saturated conditions, hypolithic communities showed no evidence of light stress, even when the quartz stones were exposed to full midday sunlight. This initial study creates a foundation for future in-situ and laboratory exploration of various adaptation mechanisms employed by photosynthetic organisms forming hypolithic microbial communities.
类型	Article ; Early Access
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000641129000001
WOS关键词	ORANGE CAROTENOID PROTEIN ; C-TERMINAL DOMAIN ; HYPOLITHIC MICROBIAL COMMUNITIES ; FAR-RED LIGHT ; NAMIB DESERT ; CHLOROPHYLL FLUORESCENCE ; PHOTOACCLIMATION FARLIP ; DRY VALLEYS ; CYANOBACTERIA ; SOIL
WOS类目	Microbiology
WOS研究方向	Microbiology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/352155
作者单位	[Gwizdala, Michal; Kruger, Tjaart P. J.] Univ Pretoria, Dept Phys, Lynnwood Rd, ZA-0002 Pretoria, South Africa; [Gwizdala, Michal; Kruger, Tjaart P. J.] Univ Pretoria, Forestry & Agr Biotechnol Inst FABI, Lynnwood Rd, ZA-0002 Pretoria, South Africa; [Lebre, Pedro H.; Cowan, Don A.] Univ Pretoria, Dept Biochem Genet & Microbiol, Ctr Microbial Ecol & Genom, Lynnwood Rd, ZA-0002 Pretoria, South Africa; [Maggs-Kolling, Gillian; Marais, Eugene] Gobabeb Namib Res Inst, Walvis Bay, Namibia
推荐引用方式 GB/T 7714	Gwizdala, Michal,Lebre, Pedro H.,Maggs-Kolling, Gillian,et al. Sub-lithic photosynthesis in hot desert habitats[J],2021.
APA	Gwizdala, Michal,Lebre, Pedro H.,Maggs-Kolling, Gillian,Marais, Eugene,Cowan, Don A.,&Kruger, Tjaart P. J..(2021).Sub-lithic photosynthesis in hot desert habitats.ENVIRONMENTAL MICROBIOLOGY.
MLA	Gwizdala, Michal,et al."Sub-lithic photosynthesis in hot desert habitats".ENVIRONMENTAL MICROBIOLOGY (2021).