Skip to main content
ARS Home » Research » Publications at this Location » Publication #65236
Title: SUCROSE TRANSPORTERS IN ASSIMILATE PARTITIONING AND PLANT GROWTH

Author
item BUSH, DANIEL
item CHIOU, TIZYY-JEN - UNIV OF ILLINOIS, URBANA

Submitted to: International Symposium on Sucrose Metabolism
Publication Type: Proceedings
Publication Acceptance Date: 10/10/1995
Publication Date: N/A
Citation: N/A

Interpretive Summary:

Technical Abstract: Although plants are photoautotropic-multicellular organisms, they are composed of many heterotrophic tissue systems that must import reduced carbon to support growth and development. Thus, long distance transport of photoassimilate is a fundamental process that, ultimately, allows plants to function as multicellular systems. Sucrose has long been recognized as the primary form of reduced carbon transported in many plant species and, consequently, it is fitting that this meeting was organized in honor of the seminal contributions of Drs. L. Leloir and C. Cardini to our understanding of sucrose metabolism. There are several sucrose transporters in plants that are key contributors to carbon partitioning within cells and between organs. These systems are differentiated by function, transport properties, expression patterns, and membrane location. They included; i) the proton-sucrose symporter that mediates phloem loading and may also contribute to the sucrose uptake in sink tissues, ii) a proton-sucrose antiport that mediates active uptake into the vacuole, iii) facilitated sucrose porters on the vacuolar membrane, and iv) at least two sucrose export systems that release sucrose from the mesophyll and phloem.