Isolation and expression analysis of two stress-responsive sucrose-synthase genes from the resurrection plant Craterostigma plantagineum (Hochst.)
M Kleines, RC Elster, MJ Rodrigo, AS Blervacq… - Planta, 1999 - Springer
M Kleines, RC Elster, MJ Rodrigo, AS Blervacq, F Salamini, D Bartels
Planta, 1999•SpringerThe enzyme sucrose synthase (UDP-glucose: D-fructose 2α-glucosyltransferase, EC 2.4.
1.13) is a key enzyme in carbohydrate metabolism, catalyzing the reversible conversion of
sucrose uridine-diphosphate into fructose and UDP-glucose. We report the molecular
characterization of two classes of cDNA and genomic clones encoding sucrose synthase
from Craterostigma plantagineum Hochst., a resurrection plant in which the turnover of
sucrose is considered to have an important role in the unique phenomenon of surviving …
1.13) is a key enzyme in carbohydrate metabolism, catalyzing the reversible conversion of
sucrose uridine-diphosphate into fructose and UDP-glucose. We report the molecular
characterization of two classes of cDNA and genomic clones encoding sucrose synthase
from Craterostigma plantagineum Hochst., a resurrection plant in which the turnover of
sucrose is considered to have an important role in the unique phenomenon of surviving …
Abstract
The enzyme sucrose synthase (UDP-glucose: D-fructose 2α-glucosyltransferase, EC 2.4.1.13) is a key enzyme in carbohydrate metabolism, catalyzing the reversible conversion of sucrose uridine-diphosphate into fructose and UDP-glucose. We report the molecular characterization of two classes of cDNA and genomic clones encoding sucrose synthase from Craterostigma plantagineum Hochst., a resurrection plant in which the turnover of sucrose is considered to have an important role in the unique phenomenon of surviving desiccation. Sucrose-synthase transcript and protein levels are modulated by dehydration and rehydration. In-situ hybridization revealed that transcripts preferentially accumulate in phloem tissues. Promoter analysis underlined a role for class-I sucrose-synthase genes in dehydration stress and in response to cis-abscisic acid. A DNA sequence motif common to class-I sucrose-synthase and sucrose-phosphate-synthase genes was discovered.
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