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An active sucrose carrier (Scr1) that is predominantly expressed in the seedling of Ricinus communis L.

Title data

Weig, Alfons ; Komor, Ewald:
An active sucrose carrier (Scr1) that is predominantly expressed in the seedling of Ricinus communis L.
In: Journal of Plant Physiology. Vol. 147 (1996) Issue 6 . - pp. 685-690.
ISSN 0176-1617
DOI: https://doi.org/10.1016/S0176-1617(11)81478-1

Abstract in another language

During the germination of Ricinus communis seedlings sucrose is released from the endosperm and taken up by the cotyledons for their growth and for export to the rapidly growing hypocotyl and roots. Both the mesophyll cells and the phloem of castor bean possess active sucrose carriers. We isolated one of these carriers by heterologous screening with the spinach sucrose carrier cDNA for further investigation of sucrose transport at the cellular level. The deduced peptide sequence of this sucrose carrier (Scr1) has 12 putative membrane spanning domains and shares homology with other transporters of the major facilitator superfamily (MFS). When expressed in Saccharomyces cerevisiae, Scr1 shows active sucrose transport that can be inhibited by PCMBS or CCCP. According to the pH-dependence the carrier seems related to SUC2 of Arabidopsis and Plantago, which are phloem-specific in these plants. It also shows a relatively high specificity for sucrose, compared with maltose or raffinose. Scr1 is expressed in equal amounts in all organs of a 6-day-old castor bean seedling and to a lesser extent in green sink and source leaves

Further data

Item Type: Article in a journal
Refereed: Yes
Additional notes: BAYCEER22518
BAYCEER122972
Keywords: research article; Ricinus; RcSCR1; sugar transport
Institutions of the University: Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Biology
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Biology > Chair Plant Physiology
Research Institutions > Research Centres > Bayreuth Center of Ecology and Environmental Research- BayCEER
Research Institutions
Research Institutions > Research Centres
Result of work at the UBT: Yes
DDC Subjects: 500 Science
500 Science > 570 Life sciences, biology
Date Deposited: 21 May 2014 06:31
Last Modified: 21 Dec 2015 10:55
URI: https://eref.uni-bayreuth.de/id/eprint/392