Enhanced drought tolerance in Arabidopsis via genetic manipulation aimed at the reduction of glucosamine-induced ROS generation
作者： Seung Hee Chu , Ha-na Noh , Sooah Kim , Kyoung Heon Kim , Suk-Whan Hong
DOI: 10.1007/S11103-010-9691-7
关键词: Transgene 、 Biochemistry 、 Biosynthesis 、 Glucosamine 、 Ectopic expression 、 Biology 、 Arabidopsis thaliana 、 Arabidopsis 、 Oxidative phosphorylation 、 Abiotic stress
摘要: In animals, high glucose exerts some of its deleterious effects by activation the hexosamine biosynthesis pathway (HBP), a branch glycolytic that produces amino sugars (Daniels et al. in Mol Endocrinol 7:1041-1048, 1993; Du Proc Natl Acad Sci USA 97:12222-12226, 2000). Glucosamine (GlcN) is naturally occurring sugar produced amidation fructose-6-phosphate. Previously, we observed glucosamine inhibits hypocotyl elongation Arabidopsis thaliana process involving significant increase reactive oxygen species. The present study investigated relationship between GlcN-induced ROS generation and abiotic stress responses generating two types transgenic plant. Scavenging endogenous GlcN ectopic expression E. coli glucosamine-6-phosphate deaminase (NagB) was to confer enhanced tolerance oxidative, drought, cold stress. Consistent with this result, overproduction synthase (GlmS) induced cell death at an early stage. Taken together, these data suggest genetic manipulation level can effectively lead stress-tolerant crop plants.
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