Universität zu Köln

Jonik, Claudia, Sonnewald, Uwe ORCID: 0000-0003-1835-5339, Hajirezaei, Mohammad-Reza, Fluegge, Ulf-Ingo and Ludewig, Frank (2012). Simultaneous boosting of source and sink capacities doubles tuber starch yield of potato plants. Plant Biotechnol. J., 10 (9). S. 1088 - 1099. HOBOKEN: WILEY. ISSN 1467-7652

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Abstract

An important goal in biotechnological research is to improve the yield of crop plants. Here, we genetically modified simultaneously source and sink capacities in potato (Solanum tuberosum cv. Desiree) plants to improve starch yield. Source capacity was increased by mesophyll-specific overexpression of a pyrophosphatase or, alternatively, by antisense expression of the ADP-glucose pyrophosphorylase in leaves. Both approaches make use of re-routing photoassimilates to sink organs at the expense of leaf starch accumulation. Simultaneous increase in sink capacity was accomplished by overexpression of two plastidic metabolite translocators, that is, a glucose 6-phosphate/phosphate translocator and an adenylate translocator in tubers. Employing such a pull approach, we have previously shown that potato starch content and yield can be increased when sink strength is elevated. In the current biotechnological approach, we successfully enhanced source and sink capacities by a combination of pull and push approaches using two different attempts. A doubling in tuber starch yield was achieved. This successful approach might be transferable to other crop plants in the future.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Jonik, Claudia UNSPECIFIED UNSPECIFIED UNSPECIFIED Sonnewald, Uwe UNSPECIFIED orcid.org/0000-0003-1835-5339 UNSPECIFIED Hajirezaei, Mohammad-Reza UNSPECIFIED UNSPECIFIED UNSPECIFIED Fluegge, Ulf-Ingo UNSPECIFIED UNSPECIFIED UNSPECIFIED Ludewig, Frank UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-477814
DOI:	10.1111/j.1467-7652.2012.00736.x
Journal or Publication Title:	Plant Biotechnol. J.
Volume:	10
Number:	9
Page Range:	S. 1088 - 1099
Date:	2012
Publisher:	WILEY
Place of Publication:	HOBOKEN
ISSN:	1467-7652
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language ADP-GLUCOSE PYROPHOSPHORYLASE; SOLANUM-TUBEROSUM; PHOSPHATE-TRANSLOCATOR; MOLECULAR CHARACTERIZATION; INORGANIC PYROPHOSPHATASE; SPINACH-CHLOROPLASTS; ANTISENSE INHIBITION; ATP/ADP TRANSPORTERS; SUCROSE TRANSPORTER; EXPRESSION Multiple languages Biotechnology & Applied Microbiology; Plant Sciences Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/47781