Molecular characterization of XVSAP1, a stress-responsive gene from the resurrection plant Xerophyta viscosa Baker

The strategy of 'complementation by functional sufficiency' was used to isolate a cDNA designated XVSAP1 from a cDNA library constructed from dehydrated Xerophyta viscosa Baker leaves. Analysis of the cDNA sequence indicated a highly hydrophobic protein with six transmembrane regions. Sout...

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Veröffentlicht in:Journal of experimental botany 2003-01, Vol.54 (381), p.191-201
Hauptverfasser: Garwe, Dahlia, Thomson, Jennifer A., Mundree, Sagadevan G.
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container_title Journal of experimental botany
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creator Garwe, Dahlia
Thomson, Jennifer A.
Mundree, Sagadevan G.
description The strategy of 'complementation by functional sufficiency' was used to isolate a cDNA designated XVSAP1 from a cDNA library constructed from dehydrated Xerophyta viscosa Baker leaves. Analysis of the cDNA sequence indicated a highly hydrophobic protein with six transmembrane regions. Southern blot analysis revealed that there are at least two copies of XVSAP1 in X. viscosa. The deduced amino acid sequence showed 49% identity to WCOR413, a low-temperature-regulated protein from wheat. The protein also showed between 25% to 56% identity to WCOR413-like proteins from Arabidopsis thaliana. Expression of XVSAP1 in Escherichia coli (srl::Tn10) conferred osmotic stress tolerance when the cells were grown in 1 M sorbitol. Analysis of gene expression using semi-quantitative RT-PCR indicated that XVSAP1 is induced by dehydration, salt stress (100 mM), both low (4 °C) and high temperature (42 °C) and high light treatment (1500 μmol m-2 s-1). These results suggest that XVSAP1 may have a significant role to play in the response of X. viscosa to abiotic stresses.
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Psychology</topic><topic>Genes</topic><topic>Genes, Plant</topic><topic>Genes. 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source Jstor Complete Legacy; Oxford University Press Journals All Titles (1996-Current); MEDLINE; Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals; Alma/SFX Local Collection
subjects Amino Acid Sequence
Amino acids
Animal and plant ecology
Animal, plant and microbial ecology
Autoecology
Base Sequence
Biological and medical sciences
Blotting, Southern
Cell membranes
Complementary DNA
Dehydration
DNA
DNA, Complementary
DNA, Plant
Escherichia coli
Fundamental and applied biological sciences. Psychology
Genes
Genes, Plant
Genes. Genome
Magnoliopsida - genetics
Molecular and cellular biology
Molecular genetics
Molecular Sequence Data
Oral rehydration
Osmotic Pressure
Plant physiology
Plant Proteins - genetics
Plants
Plants and fungi
Recombinant Proteins
Research Papers: Cell and Molecular Biology, Biochemistry and Molecular Physiology
Resurrection
Reverse Transcriptase Polymerase Chain Reaction
Sequence Homology, Amino Acid
title Molecular characterization of XVSAP1, a stress-responsive gene from the resurrection plant Xerophyta viscosa Baker
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