Unable to connect to database - 21:14:23 Unable to connect to database - 21:14:23 SQL Statement is null or not a SELECT - 21:14:23 SQL Statement is null or not a DELETE - 21:14:23 Botany & Plant Biology 2007 - Abstract Search
Unable to connect to database - 21:14:23 Unable to connect to database - 21:14:23 SQL Statement is null or not a SELECT - 21:14:23

Abstract Detail


Metabolism

Padilla-Chacón, Daniel [1], Martinez-Barajas, Eleazar [2].

Expression of sugar transporter HXT2 from Saccharomyces cerevisiae in Arabidopsis thaliana leads to modificate the metabolism and distribution of photosynthates in whole plant.

The relation between sink and source organs is important for plant growth and development. The distribution of photosynthates among different sink organs is a complex process regulated at different levels. In several important sink organs photosynthates are unloaded to the apoplastic space, where sucrose is hydrolyzed to glucose and fructose by cell wall invertase. In those organs, the incorporation of resulting hexoses will depend on the activity of monosaccharide transporters located in cell membrane. The expression and activity of several monosaccharide transporters are developmentally regulated. It suggest that hexose transporter are important in regulating photosynthates distribution. In order to enhance sink strength and modificate the distribution of photosynthates, we made a Arabidopsis thaliana transgenic plants that express a hexoses transporter from Saccharomyces cerevisiae (HXT2) under the control of a constitutive promoter (3X35S). Transgenic plants can take more glucose from the medium, roots are longer than in wild type and the activity of cell wall invertase is reduced. The data presented here demonstrate that the hexose uptake can modulate carbohydrate metabolism and the sink-source relationships. Research supported by grants from CONACyT (46827) and PAIP (6290-14), CONACyT provided scholarship (167265) to DPCh.


Log in to add this item to your schedule

1 - Universidad Nacional Autónoma de México, Departamento de Bioquímica, Circuito Institutos s/n Conjunto E, Facultad de Química. Laboratorio 102.
2 - Universidad Nacional Autónoma de México, Departamento de Bioquímica

Keywords:
phothosynthates
metabolic sink.

Presentation Type: Plant Biology Abstract
Session: P
Location: Exhibit Hall (Northeast, Southwest & Southeast)/Hilton
Date: Sunday, July 8th, 2007
Time: 8:00 AM
Number: P19026
Abstract ID:1029


Copyright © 2000-2007, Botanical Society of America. All rights