Arid
DOI10.1111/nph.14672
The desert plant Phoenix dactylifera closes stomata via nitrate-regulated SLAC1 anion channel
Mueller, Heike M.1; Schaefer, Nadine1; Bauer, Hubert1; Geiger, Dietmar1; Lautner, Silke2; Fromm, Joerg2; Riederer, Markus3; Bueno, Amauri3; Nussbaumer, Thomas4; Mayer, Klaus4; Alquraishi, Saleh A.5; Alfarhan, Ahmed H.5; Neher, Erwin6; Al-Rasheid, Khaled A. S.1,5; Ache, Peter1; Hedrich, Rainer1
通讯作者Geiger, Dietmar ; Hedrich, Rainer
来源期刊NEW PHYTOLOGIST
ISSN0028-646X
EISSN1469-8137
出版年2017
卷号216期号:1页码:150-162
英文摘要

Date palm Phoenix dactylifera is a desert crop well adapted to survive and produce fruits under extreme drought and heat. How are palms under such harsh environmental conditions able to limit transpirational water loss?


Here, we analysed the cuticular waxes, stomata structure and function, and molecular biology of guard cells from P. dactylifera.


To understand the stomatal response to the water stress phytohormone of the desert plant, we cloned the major elements necessary for guard cell fast abscisic acid (ABA) signalling and reconstituted this ABA signalosome in Xenopus oocytes. The Phoenix SLAC1-type anion channel is regulated by ABA kinase PdOST1. Energy-dispersive X-ray analysis (EDXA) demonstrated that date palm guard cells release chloride during stomatal closure. However, in Cl- medium, PdOST1 did not activate the desert plant anion channel PdSLAC1 per se. Only when nitrate was present at the extracellular face of the anion channel did the OST1-gated PdSLAC1 open, thus enabling chloride release. In the presence of nitrate, ABA enhanced and accelerated stomatal closure.


Our findings indicate that, in date palm, the guard cell osmotic motor driving stomatal closure uses nitrate as the signal to open the major anion channel SLAC1. This initiates guard cell depolarization and the release of anions together with potassium.


英文关键词abscisic acid (ABA) signalling cuticle cuticular waxes date palm Phoenix dactylifera guard cells SLAC1 S-type anion channel stomata
类型Article
语种英语
国家Germany ; Saudi Arabia
收录类别SCI-E
WOS记录号WOS:000408591500017
WOS关键词ABSCISIC-ACID ; PLASMA-MEMBRANE ; GUARD-CELLS ; KINASE ; LIGHT ; ABA ; ACTIVATION ; CHLORIDE ; MOVEMENT ; ACCUMULATION
WOS类目Plant Sciences
WOS研究方向Plant Sciences
来源机构King Saud University
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/201253
作者单位1.Univ Wurzburg, Julius von Sachs Inst, Inst Mol Plant Physiol & Biophys, Bioctr, D-97082 Wurzburg, Germany;
2.Univ Hamburg, Dept Wood Sci, D-21031 Hamburg, Germany;
3.Univ Wurzburg, Inst Ecophysiol & Vegetat Ecol, Julius von Sachs Inst, Bioctr, D-97082 Wurzburg, Germany;
4.Helmholtz Ctr Munich, Plant Genome & Syst Biol, D-85764 Neuherberg, Germany;
5.King Saud Univ, Coll Sci, Riyadh 11451, Saudi Arabia;
6.Max Planck Inst Biophys Chem, Dept Membrane Biophys, D-37077 Gottingen, Germany
推荐引用方式
GB/T 7714
Mueller, Heike M.,Schaefer, Nadine,Bauer, Hubert,et al. The desert plant Phoenix dactylifera closes stomata via nitrate-regulated SLAC1 anion channel[J]. King Saud University,2017,216(1):150-162.
APA Mueller, Heike M..,Schaefer, Nadine.,Bauer, Hubert.,Geiger, Dietmar.,Lautner, Silke.,...&Hedrich, Rainer.(2017).The desert plant Phoenix dactylifera closes stomata via nitrate-regulated SLAC1 anion channel.NEW PHYTOLOGIST,216(1),150-162.
MLA Mueller, Heike M.,et al."The desert plant Phoenix dactylifera closes stomata via nitrate-regulated SLAC1 anion channel".NEW PHYTOLOGIST 216.1(2017):150-162.
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