The yl Gene of Maize Codes for Phytoene Synthase

The maize phytoene synthase gene family: overlapping roles for carotenogenesis in endosperm, photomorphogenesis, and thermal stress tolerance.

Carotenoids are essential for photosynthesis and photoprotection; they also serve as precursors to signaling molecules that influence plant development and biotic/abiotic stress responses. With potential to improve plant yield and nutritional quality, carotenoids are targets for metabolic breeding/engineering, particularly in the Poaceae (grass family), which includes the major food crops. Depe...

The phytoene synthase gene family in the Grasses: subfunctionalization provides tissue-specific control of carotenogenesis.

Functional Analysis of the Brassica napus L. Phytoene Synthase (PSY) Gene Family

Phytoene synthase (PSY) has been shown to catalyze the first committed and rate-limiting step of carotenogenesis in several crop species, including Brassica napus L. Due to its pivotal role, PSY has been a prime target for breeding and metabolic engineering the carotenoid content of seeds, tubers, fruits and flowers. In Arabidopsis thaliana, PSY is encoded by a single copy gene but small PSY ge...

study of cohesive devices in the textbook of english for the students of apsychology by rastegarpour

this study investigates the cohesive devices used in the textbook of english for the students of psychology. the research questions and hypotheses in the present study are based on what frequency and distribution of grammatical and lexical cohesive devices are. then, to answer the questions all grammatical and lexical cohesive devices in reading comprehension passages from 6 units of 21units th...

Nucleotide 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 ...