PJB-2018-649
Do strigolactones regulate bud dormancy transition in tea?
Lin Feng
Abstract
Tea (Camellia sinensis [L.] O. Kuntze) is an important cash crop and its productivity and quality are largely related to appropriate timing of bud dormancy initiation and maintenance in winter and bud dormancy break into vegetative growth in spring. Strigolactones (SLs) are a group of terpenoid lactones derived from carotenoids which regulate bud outgrowth, shoot branching, tiller angle and environmental stress response. In this review, in addition to a brief introduction of SLs biosynthesis in plants, the association of SLs with bud dormancy and shoot branching was focused with an emphasis on the interaction with other plant hormones. Moreover, involvement of SLs in the biosynthesis of specialized metabolites such tea flavonoids, caffeine and theanine was discussed. Finally, recent advances in SLs function regulation by miRNA and environmental stress were also presented. This review provides a basis for further investigations on the mechanisms underlying the involvement of SLs in tea secondary metabolism and bud dormancy.
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