Shading Inhibits Sugar Accumulation in Leaf and Fruit of Jujube (Ziziphus jujuba Mill.)

Jujube is a characteristic light-demanding fruit tree, but quality frequently degraded because of the weak light in protected cultivation facilities south China. In this study, black shade net was used to set three intensities artificially: no shading (0%, control, NS), moderate (45%, MS), and severe (76%, SS) investigate effect low on sugar metabolism jujube. Compared with NS, chlorophyll carotenoid contents shaded leaves were increased, while specific leaf weight decreased. A decrease sucrose content, rather than fructose glucose, main factor affecting content fruits. Low expression ZjSS2 ZjSS3 inhibited synthesis leaves, thereby reducing by 23.7% SS that NS. decreased 58.1%, which mainly caused down-regulated ZjSPS1. conclusion, accumulation treatment suppressed, associated differential transcription levels related metabolic genes. The study provides new insights into phototropic plants under environments, such as