Molecular mechanisms of foliar water uptake in a desert tree (SCI)

CORC > 寒区旱区环境与工程研究所 > 中科院寒区旱区环境与工程研究所（未分类） > 期刊论文

	Molecular mechanisms of foliar water uptake in a desert tree (SCI)
	Yan X.; Zhou M. X.; Dong X. C.; Zou S. B.; Xiao H. L.; Ma X. F.
刊名	Aob Plants
	2015
卷号	7 页码:14
英文摘要	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.
收录类别	SCI
语种	英语
内容类型	期刊论文
源URL	[http://ir.casnw.net/handle/362004/27241]
专题	寒区旱区环境与工程研究所_中科院寒区旱区环境与工程研究所（未分类）_期刊论文
推荐引用方式 GB/T 7714	Yan X.,Zhou M. X.,Dong X. C.,et al. Molecular mechanisms of foliar water uptake in a desert tree (SCI)[J]. Aob Plants,2015,7:14.
APA	Yan X.,Zhou M. X.,Dong X. C.,Zou S. B.,Xiao H. L.,&Ma X. F..(2015).Molecular mechanisms of foliar water uptake in a desert tree (SCI).Aob Plants,7,14.
MLA	Yan X.,et al."Molecular mechanisms of foliar water uptake in a desert tree (SCI)".Aob Plants 7(2015):14.