Journal
FEBS LETTERS
Volume 588, Issue 20, Pages 3726-3731Publisher
WILEY
DOI: 10.1016/j.febslet.2014.08.019
Keywords
Potato; AtPAP2; Photosynthesis; Tuber yield; Sugar efflux
Funding
- General Research Fund of the HKSAR, China [HKU772710M]
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Changes in carbon flow and sink/source activities can affect floral, architectural, and reproductive traits of plants. In potato, overexpression (OE) of the purple acid phosphatase 2 of Arabidopsis (AtPAP2) resulted in earlier flowering, faster growth rate, increased tubers and tuber starch content, and higher photosynthesis rate. There was a significant change in sucrose, glucose and fructose levels in leaves, phloem and sink biomass of the OE lines, consistent with an increased expression of sucrose transporter 1 (StSUT1). Furthermore, the expression levels and enzyme activity of sucrose-phosphate synthase (SPS) were also significantly increased in the OE lines. These findings strongly suggest that higher carbon supply from the source and improved sink strength can improve potato tuber yield. (C) 2014 Federation of European Biochemical Societies. Published by Elsevier B.V. All rights reserved.
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