Research advances in the metabolism and regulation of carbohydrate in fruit trees

Sugar is the main carbon source in organisms and the main product of photosynthesis. It provides energy for organisms and plays an important role in plant growth and development. In this review, recent studies on the relationships among sugar, plant growth regulation, and fruit quality formation are summarized, with a focus on sugar transport and accumulation, gene expression, sugar signal transduction, and sugar regulation network. We also discuss prospects for further research on improving fruit quality by molecular means.