干旱区生态环境知识资源中心(Arid): Desert cyanobacteria prepare in advance for dehydration and rewetting: The role of light and temperature sensing

Arid

DOI	10.1111/mec.15074
	Desert cyanobacteria prepare in advance for dehydration and rewetting: The role of light and temperature sensing
	Oren, Nadav 1; Raanan, Hagai 1,2; Kedem, Isaac 1; Turjeman, Adi 3; Bronstein, Michal 3; Kaplan, Aaron 1; Murik, Omer 1
通讯作者	Murik, Omer
来源期刊	MOLECULAR ECOLOGY
ISSN	0962-1083
EISSN	1365-294X
出版年	2019
卷号	28 期号:9 页码:2305-2320
英文摘要	Cyanobacteria inhabiting desert biological soil crusts must prepare towards dehydration, or their revival after rewetting is severely impaired. The mechanisms involved are unknown but signalling of forthcoming dehydration by dawn illumination was demonstrated. Accurate and reproducible simulation of desert conditions enabled examination of physiological activities and transcript profiles in a model organism, Leptolyngbya ohadii, in response to specific conditions. Exposure to far red light or lack of ground warming during dawn severely reduced revival after rewetting and altered the network of gene expression. The data implicated phytochromes in light and temperature sensing. Many genes were up- or down-regulated before water content decline, while others were strongly affected by the progression of dehydration and desiccation. Transcription continues during the desiccated phase but only barely during early rewetting, although photosynthetic activity was regained. Application of rifampicin with or without a preceding dehydration phase demonstrated that RNA is stabilized/protected during desiccation, possibly by intrinsically disordered proteins. We conclude that increasing light and temperature at dawn activates a network of genes that prepare the cells towards dehydration. Quick resumption of photosynthesis upon rewetting in contrast to the slow change in the transcript profile suggested that in addition to preparing towards dehydration the cells also prepare for forthcoming rewetting, during dehydration. Unravelling the presently unknown function of many responding genes will help to clarify the networks involved.
英文关键词	biological soil crust cyanobacteria dehydration desiccation gene expression phytochrome rehydration temperature
类型	Article
语种	英语
国家	Israel ; USA
收录类别	SCI-E
WOS记录号	WOS:000471073000013
WOS关键词	BIOLOGICAL SOIL CRUSTS ; DESICCATION-TOLERANT CYANOBACTERIUM ; NOSTOC-COMMUNE CYANOBACTERIA ; ORANGE CAROTENOID PROTEIN ; SYNECHOCYSTIS SP PCC-6803 ; PHOTOSYSTEM-II ; SALT STRESS ; PCC 6803 ; PHYTOCHROME ; PHOTOSYNTHESIS
WOS类目	Biochemistry & Molecular Biology ; Ecology ; Evolutionary Biology
WOS研究方向	Biochemistry & Molecular Biology ; Environmental Sciences & Ecology ; Evolutionary Biology
来源机构	Hebrew University of Jerusalem
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/217649
作者单位	1.Hebrew Univ Jerusalem, Dept Plant & Environm Sci, Jerusalem, Israel; 2.Rutgers State Univ, Inst Earth Ocean & Atmospher Sci, Environm Biophys & Mol Ecol Program, New Brunswick, NJ USA; 3.Hebrew Univ Jerusalem, Ctr Genom Technol, Jerusalem, Israel
推荐引用方式 GB/T 7714	Oren, Nadav,Raanan, Hagai,Kedem, Isaac,et al. Desert cyanobacteria prepare in advance for dehydration and rewetting: The role of light and temperature sensing[J]. Hebrew University of Jerusalem,2019,28(9):2305-2320.
APA	Oren, Nadav.,Raanan, Hagai.,Kedem, Isaac.,Turjeman, Adi.,Bronstein, Michal.,...&Murik, Omer.(2019).Desert cyanobacteria prepare in advance for dehydration and rewetting: The role of light and temperature sensing.MOLECULAR ECOLOGY,28(9),2305-2320.
MLA	Oren, Nadav,et al."Desert cyanobacteria prepare in advance for dehydration and rewetting: The role of light and temperature sensing".MOLECULAR ECOLOGY 28.9(2019):2305-2320.