NF-YB1-regulated expression of sucrose transporters in aleurone facilitates sugar loading to rice endosperm  

作　　者：Ai-Ning Bai Xiao-Duo Lu Dong-Qi Li Jin-Xin Liu Chun-Ming Liu 

机构地区：[1]Key Laboratory of Plant Molecular Physiology, Institute of Botany, Chi- nese Academy of Sciences, Nanxincun 20, Fragrant Hill Beijing 100093, China [2]University of Chinese Academy of Sciences, 19.4 Yuquan Road, Beijing 100049, China

出　　处：《Cell Research》2016年第3期384-388,共5页细胞研究（英文版）

摘　　要：Cereal endosperms, which consist of an outer aleurone layer and an inner starchy endosperm, provide over 70% staple food for human [www.fao.org]. Rice endosperm development occurs in the caryopsis of a grain. During the grain filling stage, sucrose produced in photosynthetic leaves is transported to grains via the phloem [ 1, 2]. It has been proposed that sucrose, upon arrival in the caryopsis through the phloem located at the dorsal vascular bundle, is partially hydrolyzed by cell wall invertases （CINs） into glu- cose and fructose [3, 4]. Since endosperm is symplastically isolated from maternal tissues, it is assumed that these sug- ars are delivered to the endosperm actively through an ap- oplastic pathway by sugar transporters located in aleurone [5, 6]. However, the exact role of aleurone in regulating sugar transport remains unknown.

关 键 词：蔗糖转运蛋白 胚乳 水稻 韧皮部运输 负荷 部分水解 糊粉层 葡萄糖 

分 类 号：S511.03[农业科学—作物学] S511.01