Please note that eDoc will be permanently shut down in the first quarter of 2021!      Home News About Us Contact Contributors Disclaimer Privacy Policy Help FAQ

Quick Search
My eDoc
Session History
Support Wiki
Direct access to
document ID:

          Institute: MPI für molekulare Pflanzenphysiologie     Collection: Publikationen Pflanzenphysiologie     Display Documents

ID: 127389.0, MPI für molekulare Pflanzenphysiologie / Publikationen Pflanzenphysiologie
De novo amino acid biosynthesis in potato tubers is regulated by sucrose levels
Authors:Roessner-Tunali, U.; Urbanczyk-Wochniak, E.; Czechowski, T.; Kolbe, A.; Willmitzer, L.; Fernie, A. R.
Date of Publication (YYYY-MM-DD):2003-10
Title of Journal:Plant Physiology
Journal Abbrev.:Plant Physiol
Issue / Number:2
Start Page:683
End Page:692
Review Status:not specified
Audience:Not Specified
Abstract / Description:Plant growth and development are strongly dependent on sink-source interactions. In the majority of plants, sucrose (Suc) is the dominant form in which photo-assimilate is transported from source to sinks. Although the effects of Suc on photosynthetic metabolism have been intensively studied, the effect of Suc supply on metabolism in sink organs has received relatively little attention. For this reason, we performed a detailed characterization of the metabolism of potato (Solanum tuberosum) plants in which the Suc supply to the tuber was restricted by genetic or environmental perturbation. These characterizations revealed a clear inverse relationship between the levels of Suc and free amino acids. When data obtained from this study were considered alongside our previous work, a negative correlation between tuber Suc and amino acid content became apparent. Analysis of the transcript levels of key enzymes involved in amino acid biosynthesis revealed that several of these were increased under these conditions. Taken together, these data strongly suggest that Suc regulates amino acid biosynthesis in storage tissues such as potato tubers, most probably at the level of transcription.
Free Keywords:solanum-tuberosum
; plastidial phosphoglucomutase
; nitrogen assimilation
; transgenic plants
; starch synthesis
; diurnal changes
; tobacco-leaves
; phloem
; expression
; transporter
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für molekulare Pflanzenphysiologie/Molekulare Physiologie/AG Willmitzer/Fernie
External Affiliations:Max Planck Inst Mol Pflanzenphysiol, Muhlenberg 1, D-14476 Golm, Germany
Max Planck Inst Mol Pflanzenphysiol, D-14476 Golm, Germany
Identifiers:ISI:000185974800029 [ID No:1]
ISI:000185974800029 [ID No:2]
The scope and number of records on eDoc is subject to the collection policies defined by each institute - see "info" button in the collection browse view.