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Molecular mechanisms of foliar water uptake in a desert tree

文献类型：期刊论文

作者Yan, Xia1,2; Zhou, Maoxian4; Dong, Xicun3; Zou, Songbing2; Xiao, Honglang2; Ma, Xiao-Fei1
刊名AOB PLANTS
出版日期2015
卷号7页码:14
关键词Aquaporins drought adaptation foliar water uptake PIP2-1 Tamarix ramosissima
ISSN号2041-2851
DOI10.1093/aobpla/plv129
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.
WOS关键词PLASMA-MEMBRANE AQUAPORINS ; DRIMYS-BRASILIENSIS WINTERACEAE ; CALIFORNIA REDWOOD FOREST ; SEMPERVIRENS D. DON ; LOW AIR HUMIDITY ; GENE-EXPRESSION ; CLOUD FOREST ; HYDRAULIC CONDUCTIVITY ; TAMARIX-RAMOSISSIMA ; SALT-STRESS
资助项目'One Hundred Talents' Project of the Chinese Academy of Sciences[29Y127E71] ; National Natural Science Foundation of China[91125025] ; National Natural Science Foundation of China[31500266]
WOS研究方向Plant Sciences
语种英语
WOS记录号WOS:000369028300009
出版者OXFORD UNIV PRESS
资助机构'One Hundred Talents' Project of the Chinese Academy of Sciences ; National Natural Science Foundation of China
源URL[http://119.78.100.186/handle/113462/41604]  
专题近代物理研究所_生物物理研究室
通讯作者Ma, Xiao-Fei
作者单位1.Chinese Acad Sci, Key Lab Stress Physiol & Ecol Cold & Arid Reg Gan, Cold & Arid Reg Environm & Engn Res Inst, Lanzhou 730000, Peoples R China
2.Chinese Acad Sci, Key Lab Inland River Ecohydrol, Cold & Arid Reg Environm & Engn Res Inst, Lanzhou 730000, Peoples R China
3.Chinese Acad Sci, Inst Modern Phys, Dept Radiobiol, Lanzhou 730000, Peoples R China
4.Lanzhou Univ Finance & Econ, Sch Agr & Forestry Econ & Management, Lanzhou 730020, 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,2015,7:14.
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,7,14.
MLA Yan, Xia,et al."Molecular mechanisms of foliar water uptake in a desert tree".AOB PLANTS 7(2015):14.

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来源：近代物理研究所

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