Transcript Abundance of Phytoene Synthase 1 and Phytoene Synthase 2 Is Associated with Natural Variation of Storage Root Carotenoid Pigmentation in Carrot
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چکیده
منابع مشابه
Carotenoid Crystal Formation in Arabidopsis and Carrot Roots Caused by Increased Phytoene Synthase Protein Levels
BACKGROUND As the first pathway-specific enzyme in carotenoid biosynthesis, phytoene synthase (PSY) is a prime regulatory target. This includes a number of biotechnological approaches that have successfully increased the carotenoid content in agronomically relevant non-green plant tissues through tissue-specific PSY overexpression. We investigated the differential effects of constitutive AtPSY ...
متن کاملPlastid localization of the key carotenoid enzyme phytoene synthase is altered by isozyme, allelic variation, and activity.
Plant carotenoids have unique physiological roles related to specific plastid suborganellar locations. Carotenoid metabolic engineering could enhance plant adaptation to climate change and improve food security and nutritional value. However, lack of fundamental knowledge on carotenoid pathway localization limits targeted engineering. Phytoene synthase (PSY), a major rate-controlling carotenoid...
متن کاملA third phytoene synthase is devoted to abiotic stress-induced abscisic acid formation in rice and defines functional diversification of phytoene synthase genes.
We here report on the characterization of a novel third phytoene synthase gene (PSY) in rice (Oryza sativa), OsPSY3, and on the differences among all three PSY genes with respect to the tissue-specific expression and regulation upon various environmental stimuli. The two already known PSYs are under phytochrome control and involved in carotenoid biosynthesis in photosynthetically active tissues...
متن کاملWhite mutants of Chlamydomonas reinhardtii are defective in phytoene synthase.
Carotenoids play an integral and essential role in photosynthesis and photoprotection in plants and algae. A collection of Chlamydomonas reinhardtii mutants lacking carotenoids was characterized for pigment and tocopherol (vitamin E) composition, growth phenotypes under different light conditions, and the molecular basis of their mutant phenotype. The carotenoid-less mutants, or "white" mutants...
متن کاملNucleotide sequence of an Arabidopsis cDNA for phytoene synthase.
Carotenoid biosynthesis is a process vital to a11 photosynthetic organisms. Carotenoids provide photoprotection for the photosynthetic apparatus by dissipating excess energy in the form of heat (Koyama, 1991). PSY catalyzes the formation of phytoene, the first dedicated intermediate in the carotenoid biosynthetic pathway. We have previously isolated two PSY cDNAs from tomato that correspond to ...
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ژورنال
عنوان ژورنال: Journal of the American Society for Horticultural Science
سال: 2014
ISSN: 0003-1062,2327-9788
DOI: 10.21273/jashs.139.1.63