NDLI: A root-specific wall-associated kinase gene, HvWAK1, regulates root growth and is highly divergent in barley and other cereals

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Functional & Integrative Genomics : Volume 13, Issue 1, March 2013

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A root-specific wall-associated kinase gene, HvWAK1, regulates root growth and is highly divergent in barley and other cereals

Content Provider	Springer Nature Link
Author	Kaur, Ravneet Singh, Kashmir Singh, Jaswinder
Copyright Year	2013
Abstract	Wall-associated receptor-like kinases (WAKs) are important candidates for directly linking the extracellular matrix with intracellular compartments and are involved in developmental processes and stress response. WAK gene family has been identified in plants such as Arabidopsis and rice. Here, we present a detailed analysis of the WAK1 gene from barley cv. Golden Promise, mapped to chromosome 5H. Three BAC clones corresponding to the WAK fragment were sequenced and the full-length WAK1 gene was characterized. The gene has three exons and two short introns with a coding region of 2,178 bp encoding a protein of 725 amino acids. A regulatory region was analyzed in −1,000 bp sequence upstream to start codon. Using conserved domains database and SMART, various conserved domains such as GUB WAK Bind, epidermal growth factor CA, and protein kinase C as well as other regions like signal peptides, active sites, and transmembrane domains were identified. The gene organization of HvWAK1 was compared with wheat (TaWAK1) and Arabidopsis (AtWAK1), suggesting that the WAK1 gene organization has remained highly conserved. Nonetheless, WAK1 was found to be highly divergent when compared with sequences available from barley cv. Haruna Nijo (50 %), rice (46 %), wheat (21 %), Arabidopsis (25 %), and maize (19 %). This divergence may have facilitated a better adaptation to surrounding environments due to its role in communication between the extracellular matrix, cell, and outer environment. Semiquantitative RT-PCR-based expression analysis indicates HvWAK1 expression is specific to roots. Significant differences in root growth between GP wild type and GP-Ds mutant seedlings were observed under control and salt stress conditions.
Starting Page	167
Ending Page	177
Page Count	11
File Format	PDF
ISSN	1438793X
Journal	Functional & Integrative Genomics
Volume Number	13
Issue Number	2
e-ISSN	14387948
Language	English
Publisher	Springer-Verlag
Publisher Date	2013-02-27
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	WAKs Barley Abiotic stress Bioinformatics Ac/Ds Cell Biology Plant Genetics & Genomics Microbial Genetics and Genomics Biochemistry Animal Genetics and Genomics
Content Type	Text
Resource Type	Article
Subject	Genetics Medicine

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A root-specific wall-associated kinase gene, HvWAK1, regulates root growth and is highly divergent in barley and other cereals

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A root-specific wall-associated kinase gene, HvWAK1, regulates root growth and is highly divergent in barley and other cereals