Molecular mechanisms of foliar water uptake in a desert tree

doi:10.1093/aobpla/plv129

	Molecular mechanisms of foliar water uptake in a desert tree
	Yan, Xia ; Zhou, Maoxian; Dong, Xicun ; Zou, Songbing ; Xiao, Honglang ; Ma, Xiao-Fei
	2015
发表期刊	AOB PLANTS
卷号	7
摘要	Water deficits severely affect growth, particularly for the plants in arid and semiarid regions of the world. In addition to precipitation, other subsidiary water, such as dew, fog, clouds and small rain showers, may also be absorbed by leaves in a process known as foliar water uptake. With the severe scarcity of water in desert regions, this process is increasingly becoming a necessity. Studies have reported on physical and physiological processes of foliar water uptake. However, the molecular mechanisms remain less understood. As major channels for water regulation and transport, aquaporins (AQPs) are involved in this process. However, due to the regulatory complexity and functional diversity of AQPs, their molecular mechanism for foliar water uptake remains unclear. In this study, Tamarix ramosissima, a tree species widely distributed in desert regions, was investigated for gene expression patterns of AQPs and for sap flow velocity. Our results suggest that the foliar water uptake of T. ramosissima occurs in natural fields at night when the humidity is over a threshold of 85 %. The diurnal gene expression pattern of AQPs suggests that most AQP gene expressions display a circadian rhythm, and this could affect both photosynthesis and transpiration. At night, the PIP2-1 gene is also upregulated with increased relative air humidity. This gene expression pattern may allow desert plants to regulate foliar water uptake to adapt to extreme drought. This study suggests a molecular basis of foliar water uptake in desert plants.
关键词	Aquaporins drought adaptation foliar water uptake PIP2-1 Tamarix ramosissima
DOI	10.1093/aobpla/plv129
收录类别	SCI ; SCOPUS ; SCIE
ISSN	2041-2851
语种	英语
WOS研究方向	Plant Sciences ; Environmental Sciences & Ecology
WOS类目	Plant Sciences ; Ecology
WOS记录号	WOS:000369028300009
出版者	OXFORD UNIV PRESS
原始文献类型	Article
引用统计	被引频次：26[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.lzufe.edu.cn/handle/39EH0E1M/13190
专题	农林经济管理学院
作者单位	1.Chinese Acad Sci, Key Lab Inland River Ecohydrol, Cold & Arid Reg Environm & Engn Res Inst, Lanzhou 730000, Peoples R China; 2.Chinese Acad Sci, Key Lab Stress Physiol & Ecol Cold & Arid Reg Gan, Cold & Arid Reg Environm & Engn Res Inst, Lanzhou 730000, Peoples R China; 3.Lanzhou Univ Finance & Econ, Sch Agr & Forestry Econ & Management, Lanzhou 730020, Peoples R China; 4.Chinese Acad Sci, Inst Modern Phys, Dept Radiobiol, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Yan, Xia,Zhou, Maoxian,Dong, Xicun,et al. Molecular mechanisms of foliar water uptake in a desert tree[J]. AOB PLANTS,2015,7.
APA	Yan, Xia,Zhou, Maoxian,Dong, Xicun,Zou, Songbing,Xiao, Honglang,&Ma, Xiao-Fei.(2015).Molecular mechanisms of foliar water uptake in a desert tree.AOB PLANTS,7.
MLA	Yan, Xia,et al."Molecular mechanisms of foliar water uptake in a desert tree".AOB PLANTS 7(2015).

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