广西植物2016，Vol.36Issue(12)：1492-1497,6.DOI:10.11931/guihaia.gxzw201510031
木薯蔗糖合成、转运与块根淀粉积累关系研究
Relationship between sucrose' s synthesis, distribution and the starch accumulation in the root tuber of cassava
摘要
Abstract
Two cassava cultivars with different starch contents were taken as materials in the study, and were Fuxuan 01 and SC124. The relationship between sucrose' s synthesis, distribution and the starch accumulation in the root tuber was studied. Leaf, stem and root sucrose accumulation and starch accumulation in the root tuber of different cassava cultivars were determined, and their relations were analyzed in the different growth periods, respectively. The results showed that thecontent of sucrose in Fuxuan 01' s leaf and stem washigher than that of SC124 in all periods, and the accumulation of su-crose in root was higher than that of SC124 before initial stage of root tuber thickening, but lower after initial stage of root tuber thickening. In the whole growth period, the starch content and starch synthesis rate in the root tuber of Fuxuan 01 were higher than that of SC124. Root ' s sucrose content was significantly declined with the growth period delayed. The change trend of sucrose content in leaf and stem was opposite to that of starchsynthesis rate, which indicated that sucrose content in leaf and stem decreased while the root starch accumulation rate increased, and the sucrose content in leaf and stem increased while the rate of starch synthesis reduced obviously. The root was the part with the highest content of su-crose, then followed by the stem, and the part with the lowest content of sucrose was leaf in the early root formation period. But the trend was opposite in the mature period, it was the leaf part with highest content of sucrose, then followed by the stem, and the part with lowest content of sucrose was root. The results of correlation analysis showed that the correla-tion between the sucrose content in leaf, stem and the starch accumulation in root tuber of cassava was positively related. The relation was significant between the starch accumulation in root tuber and the sucrose content in leaf but not in stem. The correlation between the starch synthesis in root tuber and the sucrose content of cassava was significantly negative-ly related. The relationship between sucrose's transportation, distribution and the root's starch accumulation in cassava was closely related, and the abilities of synthesizing sucrose in leaf and utilizing sucrose in root tuber play key roles in the process of starch accumulation. This study provides the information for the production and breeding of cassava.关键词
木薯/蔗糖/合成/分配/淀粉积累Key words
cassava/sucrose/synthesis/allocation/starch accumulation分类
农业科技引用本文复制引用
朱艳梅,罗兴录,颜国彪,樊吴静..木薯蔗糖合成、转运与块根淀粉积累关系研究[J].广西植物,2016,36(12):1492-1497,6.基金项目
国家"973"计划课题项目(2010CB126601) （2010CB126601）
广西科学研究与技术开发计划项目(桂科重14121005-2-1) （桂科重14121005-2-1）
南宁市科学研究与开发计划项目(201109044B) （201109044B）
国家现代农业产业体系广西薯类产业创新团队"薯类产业功能专家"项目(nycytxgxcxtd-03-11-2) （nycytxgxcxtd-03-11-2）
南宁市科学研究与技术开发计划项目(20132307) [Supported by the National "973" Plan (2010CB126601) （20132307）
the Program of Science Research and Technology Development in Guangxi (14121005-2-1) （14121005-2-1）
the Plan of Science Research and Development in Nanning(201109044B) （201109044B）
the Innovation Team of Potato Industry"the Expert on Potato Industry Function" of National Modern Agricultural Industry System(nycytxgxcxtd-03-11-2) （nycytxgxcxtd-03-11-2）
the Plan of Science Research and Development in Nanning(20132307)]. （20132307）
