Genetic Engineering of Glycinebetaine Production toward Enhancing Stress Tolerance in Plants: Metabolic Limitations
نویسندگان
چکیده
منابع مشابه
Genetic engineering of glycinebetaine production toward enhancing stress tolerance in plants: metabolic limitations.
Glycinebetaine (betaine) affords osmoprotection in bacteria, plants and animals, and protects cell components against harsh conditions in vitro. This and a compelling body of other evidence have encouraged the engineering of betaine production in plants lacking it. We have installed the metabolic step for oxidation of choline, a ubiquitous substance, to betaine in three diverse species, Arabido...
متن کاملGenetic engineering of glycinebetaine synthesis in plants: current status and implications for enhancement of stress tolerance.
Metabolic acclimation via the accumulation of compatible solutes is regarded as a basic strategy for the protection and survival of plants in extreme environments. Certain plants accumulate significant amounts of glycinebetaine (betaine), a compatible quaternary amine, in response to high salinity, cold and drought. It is likely that betaine is involved in the protection of macrocomponents of p...
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Plants respond with changes in their pattern of gene expression and protein products when exposed to low temperatures. Thus ability to adapt has an impact on the distribution and survival of the plant, and on crop yields. Many species of tropical or subtropical origin are injured or killed by non-freezing low temperatures, and exhibit various symptoms of chilling injury such as chlorosis, necro...
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Astaxanthin responsible for the red color of red fish and crustacean has beneficial effects on human health as well as its utility as a pigmentation source in aquaculture. Astaxanthin biosynthetic pathway from b-carotene needs two enzymes, a carotenoid 4,4 -ketolase (oxygenase) and a carotenoid 3,3 -hydroxylase. b-Carotene is usually one of dominant carotenoids in higher plants, which lack the ...
متن کاملExogenous application of glycinebetaine increases chilling tolerance in tomato plants.
Tomato (Lycopersicon esculentum Mill. cv. Moneymaker) plants are chilling sensitive, and do not naturally accumulate glycinebetaine (GB), a metabolite that functions as a stress protectant. We reported previously that exogenous GB application enhanced chilling tolerance in tomato. To understand its protective role better, we have further evaluated various parameters associated with improved tol...
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ژورنال
عنوان ژورنال: Plant Physiology
سال: 2000
ISSN: 1532-2548,0032-0889
DOI: 10.1104/pp.122.3.747