Investigating potato response to drought exposure
(2009) International Conference on Plant Abiotic Stress Tolerance — Location: Vienna, Austria (8.February.2009)
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- Abstract
- Water availability being one of the major limitations to plant productivity, the presented project investigated the impact of drought exposure on potato quality and yield. The present work aimed at identifying metabolites implicated in drought stress tolerance in relation to gene expression involved in their metabolic pathways. Plants of the most drought tolerant clone Sullu and the drought sensitive clone SS2613, both Solanum tuberosum spp. Andigena, were cultivated in an experimental station in Peru. In the drought plot, irrigation was stopped 86 days after planting and during 58 days. Gene expression and metabolite analysis were studied in both clones after 15, 28 and 49 days of drought treatment on the 3rd fully expanded leaf. Some metabolites susceptible to assume protective functions have been measured. In response to drought exposition, proline accumulation was more important in Sullu than in SS2613. Similarly, an accumulation of hydroxproline and trigonelline occurred only in Sullu. The concentration of the polyamine spermine was higher in response to drought treatment in both clones as compared to control plants, but this difference occurred sooner in SS2613. The most striking result regarding the carbohydrates and polyols was the increase in inositol level which occurred more rapidly and was much more important in Sullu than in SS2613. In parallel, response to drought on gene expression was analysed, focusing mainly on carbon and energy metabolism, photosynthesis and amino acid metabolism. Results of biochemical analyses will be discussed in relation to gene expression. Indeed, using this integrative approach is of great interest to understand metabolic pathways involved in drought response.
Citations
Lefèvre, I. S., Legay, S., Schafleitner, R., Hausman, J.-F., & Evers, D. (2009). Investigating potato response to drought exposure. International Conference on Plant Abiotic Stress Tolerance, Vienna, Austria. https://hdl.handle.net/2078.5/159116