Involvement of multiple phytoene synthase genes in tissue- and cultivar-specific accumulation of carotenoids in loquat.

ABSTRACT: Differences in carotenoid accumulation between tissues and cultivars is common in plants. White-fleshed loquat cultivars had low levels of carotenoids in the flesh, but accumulated carotenoids in peel when ripe, and the leaves accumulated similar carotenoids to those in the red-fleshed loquat cultivars. The catalytic activity and expression patterns of four phytoene synthase (PSY) genes, EjPSY1, EjPSY2A, EjPSY2B, and EjPSY3, were analysed to understand their roles in different loquat (Eriobotrya japonica Lindl.) types. EjPSY1 was responsible for carotenoid synthesis in the fruit peel but not the flesh, whereas EjPSY2A was responsible for carotenoid accumulation in flesh of ripening fruit. A mutant EjPSY2A (d) , with the same tissue specificity and expression level as EjPSY2A, but lacking t

SUBMITTER: Fu X 

PROVIDER: S-EPMC4115255 | biostudies-literature | 2014 Aug

REPOSITORIES: biostudies-literature