Cellular expansion and gene expression in the developing grape (Vitis vinifera L.).
J Schlosser1, N Olsson, M Weis
1Faculty of Land and Food Systems, University of British Columbia, Vancouver, British Columbia, Canada.
Protoplasma
|April 19, 2008
Summary
Grape berry growth involves distinct stages, with cell wall and water transport genes showing specific expression patterns. The grape berry skin plays a role in modulating berry growth through these gene expressions.
Area of Science:
- Plant Biology
- Molecular Biology
- Agricultural Science
Background:
- Grape berry development is a complex process involving cell division, expansion, and differentiation.
- Understanding the molecular mechanisms regulating berry growth is crucial for optimizing grape quality and yield.
Purpose of the Study:
- To investigate the expression profiles of genes related to cell wall metabolism and water transport during grape berry development.
- To correlate gene expression with berry growth, chemical composition, and cellular changes.
Main Methods:
- Quantitative real-time PCR was used to analyze gene expression in berry pericarp tissues.
- Grape berry growth, chemical composition, and cellular morphology were monitored throughout development.
Main Results:
- Cell wall-modifying and aquaporin gene expression exhibited a bimodal pattern, correlating with rapid growth stages (I and III).
- Cellular expansion varied across pericarp tissues during different growth stages.
- Specific gene expression in exocarp and mesocarp tissues showed temporal differences, particularly during stage II.
Conclusions:
- Grape berry skin (exocarp) gene expression, including pectin methylesterase, pectate lyase, aquaporins, and expansins, is linked to berry growth modulation.
- The study highlights the dynamic role of cell wall metabolism and water transport genes in Vitis vinifera L. berry development.
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