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Heterologous expression of AtPAP2 in transgenic potato influences carbon metabolism and tuber development

  • 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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Author details:Youjun Zhang, Feng Sun, Jörg FettkeORCiDGND, Mark Aurel Schoettler, Lawrence Ramsden, Alisdair R. FernieORCiDGND, Boon Leong Lim
DOI:https://doi.org/10.1016/j.febslet.2014.08.019
ISSN:0014-5793
ISSN:1873-3468
Pubmed ID:https://pubmed.ncbi.nlm.nih.gov/25173632
Title of parent work (English):FEBS letters : the journal for rapid publication of short reports in molecular biosciences
Publisher:Elsevier
Place of publishing:Amsterdam
Publication type:Article
Language:English
Year of first publication:2014
Publication year:2014
Release date:2017/03/27
Tag:AtPAP2; Photosynthesis; Potato; Sugar efflux; Tuber yield
Volume:588
Issue:20
Number of pages:6
First page:3726
Last Page:3731
Funding institution:General Research Fund of the HKSAR, China [HKU772710M]
Organizational units:Mathematisch-Naturwissenschaftliche Fakultät / Institut für Biochemie und Biologie
Peer review:Referiert
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