Abstract
Plants are exposed to many kinds of environmental stresses. To overcome these stresses, plants respond with biochemical and physiological changes, for example, expressing genes involved in metabolism and transport. Especially, sugars accumulating during environmental stresses are thought to play important roles in stress tolerance. In this study, we analyzed a stress-inducible monosaccharide transporter gene ERD6A and its homolog ERD6B. ERD6 was originally isolated from a cDNA library from Arabidopsis plants that were exposed to dehydration stress for one hour. At first, we analyzed expression of ERD6A and ERD6B genes in response to dehydration, cold and high salinity stresses by RNA gel blot analysis. The expression levels of these genes were increased by those stresses. We also investigated tissue-specific expression patterns, subcellular localization and phenotypes of ERD6A and ERD6B knock out mutants.
