Disruption of the cellulose synthase gene, AtCesA8/IRX1, enhances drought and osmotic stress tolerance in Arabidopsis
Copyright policy )Disruption of the cellulose synthase gene, AtCesA8/IRX1, enhances drought and osmotic stress tolerance in Arabidopsis
SummaryTwo allelic Arabidopsis mutants, leaf wilting 2‐1 and leaf wilting 2‐2 (lew2‐1 and lew2‐2 ), were isolated in a screen for plants with altered drought stress responses. The mutants were more tolerant to drought stress as well as to NaCl, mannitol and other osmotic stresses. lew2 mutant plants accumulated more abscisic acid (ABA), proline and soluble sugars than the wild type. The expression of a stress‐inducible marker gene RD29A, a proline synthesis‐related gene P5CS (pyrroline‐5‐carboxylate synthase) and an ABA synthesis‐related gene SDR1 (alcohol dehydrogenase/reductase) was higher in lew2 than in the wild type. Map‐based cloning revealed that the lew2 mutants are new alleles of the AtCesA8/IRX1 gene which encodes a subunit of a cellulose synthesis complex. Our results suggest that cellulose synthesis is important for drought and osmotic stress responses including drought induction of gene expression.
- State Key Laboratory of Plant Physiology and Biochemistry China (People's Republic of)
- China Agricultural University China (People's Republic of)
- University of California, Riverside United States
Genetic Markers, Time Factors, Arabidopsis, Germination, Sodium Chloride, Gene Expression Regulation, Plant, Osmotic Pressure, Cellulose, Alleles, Plant Stems, Arabidopsis Proteins, Gene Expression Regulation, Developmental, Water, Up-Regulation, Phenotype, Glucosyltransferases, Seedlings, Mutation, Seeds, Abscisic Acid
Genetic Markers, Time Factors, Arabidopsis, Germination, Sodium Chloride, Gene Expression Regulation, Plant, Osmotic Pressure, Cellulose, Alleles, Plant Stems, Arabidopsis Proteins, Gene Expression Regulation, Developmental, Water, Up-Regulation, Phenotype, Glucosyltransferases, Seedlings, Mutation, Seeds, Abscisic Acid
citations This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).206 popularity This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.Top 1% influence This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).Top 10% impulse This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.Top 10%
Citations provided by BIP!Popularity provided by BIP!