Biotechnology Bulletin ›› 2019, Vol. 35 ›› Issue (4): 101-107.doi: 10.13560/j.cnki.biotech.bull.1985.2018-0829

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Research Progress on Potato Starch Synthesis and Degradation

HE Hu-yi, TANG Zhou-ping, YANG Xin, FAN Wu-jing, TAN Guan-ning, LI Li-shu, HE Xin-min   

  1. Cash Crops Research Institute,Guangxi Academy of Agricultural Sciences,Nanning 530007
  • Received:2018-09-25 Online:2019-04-26 Published:2019-05-05

Abstract: Potato is the fourth largest food crop in China and its total output accounts for 20% of the grain yield in the country. Potato is a C3 crop and its starch content is relatively low,which is related to its starch synthesis and degradation process. Enzymes related to potato starch synthesis include ADP-glucose pyrophosphorylase,granule-bound starch synthase,soluble starch synthase,starch branching enzyme,and starch debranching enzyme,while α-amylase,β-amylase,glucan water dikinase,phosphoglucan water dikinase,acid invertase,and neutral/alkaline inverstase are associated with the degradation of potato starch. Cloning potato starch synthesis and degradation genes is of great significance for genetic improvement of potato varieties. At present some cloned genes have been widely used in increasing starch content,modifying starch,and changing starch components in potato. This paper summarized the research progress on potato starch synthesis and degrading enzyme genes. Some suggestions have been put forward for future research,aiming at providing reference for future research on potato starch improvement engineering.

Key words: potato, starch synthesis, starch degradation, genetic engineering