Salt hypersensitive mutant 9, a nucleolar APUM23 protein, is essential for salt sensitivity in association with the ABA signaling pathway in Arabidopsis

BMC Plant Biology
Kai-Chau HuangWan-Hsing Cheng

Abstract

Although the nucleolus involves two major functions: pre-rRNA processing and ribosome biogenesis/assembly, increasing evidence indicates that it also plays important roles in response to abiotic stress. However, the possible regulatory mechanisms underlying the nucleolar proteins responsive to abiotic stress are largely unknown. High salinity is one of the major abiotic stresses, which hinders plant growth and productivity. Here, genetic screening approach was used to identify a salt hypersensitive mutant 9 (sahy9) mutant, also known as apum23, in Arabidopsis thaliana. Functional characterization of SAHY9/APUM23 through analyses of gene/protein expression profiles and metabolites was performed to decipher the possible regulatory mechanisms of the nucleolar protein SAHY9/APUM23 in response to salt stress. Seedlings of the sahy9/apum23 mutant displayed postgermination developmental arrest and then became bleached after prolonged culture under various salt stresses. Transcriptomic and proteomic analyses of salt-treated sahy9/apum23 and wild-type seedlings revealed differential expression of genes/proteins that have similar functional categories of biological processes, primarily those involved in cellular and metabolic processes a...Continue Reading

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Citations

Jun 21, 2018·Scientific Reports·Muhammad ArshadAbdelali Hannoufa
Jan 23, 2020·Journal of Experimental Botany·Marieke Dubois, Dirk Inzé
Aug 22, 2018·International Journal of Molecular Sciences·Jaroslav PavlůMartin Černý
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Jun 22, 2020·Plant Science : an International Journal of Experimental Plant Biology·Chris R JoshnaDouglas G Muench
Apr 2, 2021·Plant Physiology·Pei-Jung HsuWan-Hsing Cheng
Jul 3, 2021·Frontiers in Plant Science·Bhavika TiwariWolfgang Frank
Jul 3, 2021·International Journal of Molecular Sciences·Muthusamy MuthusamySoo-In Lee

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Methods Mentioned

BETA
PCR
salt stress
GTPase1
transgenic
salt treatment
enzyme-linked immunosorbent assay

Software Mentioned

GeneSpring GX
agriGO
MAS
Primer Express

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