Chinese Bulletin of Botany ›› 2015, Vol. 50 ›› Issue (1): 107-121.DOI: 10.3724/SP.J.1259.2015.00107

• SPECIAL TOPICS • Previous Articles     Next Articles

The Molecular Mechanism of Long-distance Sugar Transport in Plants

Yi Zhang1, Dabing Zhang1, Man Liu2, *   

  1. 1School of Life Sciences and Biotechnology, hanghai Jiao Tong University, Shanghai 200240,
    2China Shanghai Ruifeng Company on Agricultural Science nd Technology, Shanghai 201106, China
  • Received:2014-03-06 Accepted:2014-04-14 Online:2015-01-01 Published:2015-04-09
  • Contact: Liu Man
  • About author:

    ? These authors contributed equally to this paper

Abstract: Abstract Plants use CO2 to synthesize carbohydrates in plant leaves, sheaths and green stems during photosynthesis. After long-distance transport, carbohydrates are consumed or stored in sink tissues such as developing tissues, pollen and fruits. Sucrose is the main type of long-distance-transported carbohydrate in higher plants. Transport of sucrose from the source to sink includes phloem loading in the source tissues, transport in vascular bundles, and phloem unloading in sink tissues. Genetics and molecular biology experiments showed that sucrose transporters, invertases and monosaccharide transporters play an important role in loading and unloading carbohydrates. We review the current literatures on carbohydrate transport and the molecular mechanisms of regulating transport.