Characterization and functional divergence of genes encoding sucrose transporters in oilseeds castor bean  

作　　者：Pei Jin Di Wu Huan Dai Rui Sun Aizhong Liu 

机构地区：[1]Key Laboratory for Forest Resources Conservation and Utilization in the Southwest Mountains of China,Ministry of Education,Southwest Forestry University,Kunming,China [2]Key Laboratory of Economic Plants and Biotechnology,Yunnan Key Laboratory for Wild Plant Resources,Kunming Institute of Botany,Chinese Academy of Sciences,Kunming,China

出　　处：《Oil Crop Science》2022年第1期31-39,共9页中国油料作物学报(英文版）

基　　金：supported by the National Natural Science Foundation of China(31661143002 and 31771839)。

摘　　要：Castor bean(Ricinus communis L.)is an economically important non-edible oilseed crop.Its seed oils are rich in hydroxy fatty acid,which are highly valuable with a wide range of industrial applications.Sucrose transportation is critical in regulating the growth,development and oilseed yield in castor bean.The transporters or carriers(SUTs or SUCs)play a central role in orchestrating sucrose allocation and aiding in plant adaptation to diverse stresses.In this study,based on castor bean genome,three RcSUCs(RcSUC2,RcSUC3 and RcSUC4)were identified and characterized.The expressional profiles of RcSUCs in different tissues such as leaf,stem,root,phloem and seed tissues exhibited a distinct divergence of gene expression,suggesting that the functions of RcSUC2,RcSUC3 and RcSUC4 are differentiated into long or short-distance transportation among tissues.Additionally,under abiotic stresses including hot temperature,low temperature,drought and salt stresses,the sugar allocation among leaf,stem and roots was tested.The expressional changes of Rc SUCs in leaf,stem and root tissues were associated with sugar transportation and allocation.Taken together,the differential expression of Rc SUCs among tissues responsing to abiotic stress suggested functional differences in sucrose transport and redistribution in different tissues.This study is helpful to understand the physiological and molecular mechanisms of sucrose transportation and allocation among tissues in heterotrophic oilseeds,and could provide clues for genetic improvement and optimization of cultivation practices.

关 键 词：Sucrose transporter Castor bean Gene identification Expression profile Abiotic stress 

分 类 号：S565.6[农业科学—作物学]