Endodermal ABA Signaling Promotes Lateral Root Quiescence during Salt Stress in Arabidopsis Seedlings

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Fältnamn	Indikatorer	Metadata
000		03250naa a2200337 4500
001		oai:slubar.slu.se:53843
003		SwePub
008		240410s2013 \| \|\|\|\|\|\|\|\|\|\|\|000 \|\|eng\|
024	7	a https://res.slu.se/id/publ/538432 URI
024	7	a https://doi.org/10.1105/tpc.112.1072272 DOI
040		a (SwePub)slu
041		a engb eng
042		9 SwePub
072	7	a ref2 swepub-contenttype
072	7	a art2 swepub-publicationtype
100	1	a Bhalerao, Rishikesh P.u Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för skoglig genetik och växtfysiologi,Department of Forest Genetics and Plant Physiology4 aut0 (Swepub:slu)48176
245	1 0	a Endodermal ABA Signaling Promotes Lateral Root Quiescence during Salt Stress in Arabidopsis Seedlings
264		c 2013-01-22
264	1	b Oxford University Press (OUP),c 2013
264	1	b American Society of Plant Biologists,c 2024
520		a The endodermal tissue layer is found in the roots of vascular plants and functions as a semipermeable barrier, regulating the transport of solutes from the soil into the vascular stream. As a gateway for solutes, the endodermis may also serve as an important site for sensing and responding to useful or toxic substances in the environment. Here, we show that high salinity, an environmental stress widely impacting agricultural land, regulates growth of the seedling root system through a signaling network operating primarily in the endodermis. We report that salt stress induces an extended quiescent phase in postemergence lateral roots (LRs) whereby the rate of growth is suppressed for several days before recovery begins. Quiescence is correlated with sustained abscisic acid (ABA) response in LRs and is dependent upon genes necessary for ABA biosynthesis, signaling, and transcriptional regulation. We use a tissue-specific strategy to identify the key cell layers where ABA signaling acts to regulate growth. In the endodermis, misexpression of the ABA insensitive1-1 mutant protein, which dominantly inhibits ABA signaling, leads to a substantial recovery in LR growth under salt stress conditions. Gibberellic acid signaling, which antagonizes the ABA pathway, also acts primarily in the endodermis, and we define the crosstalk between these two hormones. Our results identify the endodermis as a gateway with an ABA-dependent guard, which prevents root growth into saline environments.
650	7	a NATURVETENSKAPx Biologix Biokemi och molekylärbiologi0 (SwePub)106022 hsv//swe
650	7	a NATURAL SCIENCESx Biological Sciencesx Biochemistry and Molecular Biology0 (SwePub)106022 hsv//eng
650	7	a NATURVETENSKAPx Biologix Cellbiologi0 (SwePub)106042 hsv//swe
650	7	a NATURAL SCIENCESx Biological Sciencesx Cell Biology0 (SwePub)106042 hsv//eng
710	2	a Sveriges lantbruksuniversitetb Institutionen för skoglig genetik och växtfysiologi4 org
710	2	a Sveriges lantbruksuniversitet
773	0	t Plant Celld : Oxford University Press (OUP)g 25, s. 324-341q 25<324-341x 1040-4651x 1532-298X
856	4	u http://www.plantcell.org/content/plantcell/25/1/324.full.pdf
856	4 8	u https://res.slu.se/id/publ/53843
856	4 8	u https://doi.org/10.1105/tpc.112.107227

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NATURVETENSKAP: NATURVETENSKAP; och Biologi; och Biokemi och mole ...

NATURVETENSKAP: NATURVETENSKAP; och Biologi; och Cellbiologi

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Av lärosätet: Sveriges Lantbruksuniversitet

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