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Abscisic acid signaling activates distinct VND transcription factors to promote xylem differentiation in Arabidopsis

Ramachandran, Prashanth and Augstein, Frauke and Mazumdar, Shamik and Van Nguyen, Thanh and Minina, Elena A. and Melnyk, Charles and Carlsbecker, Annelie (2021). Abscisic acid signaling activates distinct VND transcription factors to promote xylem differentiation in Arabidopsis. Current Biology. 31 , 3153-3161
[Research article]

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Abstract

Plants display remarkable abilities to adjust growth and development to environmental conditions, such as the amount of available water. This developmental plasticity is apparent not only in root and shoot growth rates, but also in tissue patterning and cell morphology.(1,2) We have previously shown that in response to limited water availability, Arabidopsis thaliana root displays changes in xylem morphology, mediated by the non-cell-autonomous action of abscisic acid, ABA.(2) Here, we show, through analyses of ABA response reporters and tissue-specific suppression of ABA signaling, that xylem cells themselves act as primary signaling centers governing both xylemcell fate and xylem differentiation rate, revealing the cell-autonomous control of multiple aspects of xylem development by ABA. ABA rapidly activates the expression of genes encoding VASCULAR-RELATED NAC DOMAIN (VND) transcription factors. Molecular and genetic analyses revealed that the two ABA-mediated xylem developmental changes are regulated by distinct members of this transcription factor family, with VND2 and VND3 promoting differentiation rate of metaxylem cells, while VND7 promotes the conversion of metaxylem toward protoxylem morphology. This phenomenon shows how different aspects of developmental plasticity can be interlinked, yet genetically separable. Moreover, similarities in phenotypic and molecular responses to ABA in diverse species indicate evolutionary conservation of the ABA-xylem development regulatory network among eudicots. Hence, this study gives molecular insights into how environmental stress modifies plant vascular anatomy and has potential relevance for water use optimization and adaptation to drought conditions.

Authors/Creators:Ramachandran, Prashanth and Augstein, Frauke and Mazumdar, Shamik and Van Nguyen, Thanh and Minina, Elena A. and Melnyk, Charles and Carlsbecker, Annelie
Title:Abscisic acid signaling activates distinct VND transcription factors to promote xylem differentiation in Arabidopsis
Series Name/Journal:Current Biology
Year of publishing :2021
Volume:31
Page range:3153-3161
Number of Pages:15
Publisher:CELL PRESS
ISSN:0960-9822
Language:English
Publication Type:Research article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Botany
URN:NBN:urn:nbn:se:slu:epsilon-p-113301
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-113301
Additional ID:
Type of IDID
DOI10.1016/j.cub.2021.04.057
Web of Science (WoS)000678562700015
ID Code:25152
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Dept. of Plant Biology and Forest Genetics (until 131231)
(NL, NJ) > Department of Molecular Sciences
Deposited By: SLUpub Connector
Deposited On:02 Sep 2021 10:25
Metadata Last Modified:02 Sep 2021 10:31

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