Comparative transcriptomics approach in elucidation of carotenoid biosynthesis regulation in grains of rice (Oryza sativa L.).

ABSTRACT: Estimation of phytoene, lycopene, β-carotene, lutein, and zeaxanthin in grains of white, brown and purple cultivars of rice revealed marked differences in the levels of these carotenoid intermediates amongst the cultivars. Grains of white rice did not show any significant accumulation of carotenoid intermediates at any stage of development. On the other hand, grains of the purple cultivar accumulated 49.16 ± 5 µg of β-carotene, 28.89 ± 3.2 µg of lutein and 34.65 ± 4.6 µg of zeaxanthin per gm of grain fresh weight. In addition to PSY1, higher expression of βLCY than εLCY appears to be an important factor in determining the flux of pathway towards synthesis of β-β branch carotenoids in purple rice. This cultivar showed a higher fold change in carotenoid precursors during transition from milk

SUBMITTER: Chettry U 

PROVIDER: S-EPMC6367445 | biostudies-literature | 2019 Feb

REPOSITORIES: biostudies-literature