Potato response under drought exposure
(2009) FNRS Contact Group, Plant Biology: from gene to function, Plants and their soil environment — Location: Gembloux, Belgium (2.April.2009)
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- Water availability being one of the major limitations to plant productivity, the presented project investigated the impact of drought exposure on potato tubers’ 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 cultivar Sullu and the drought sensitive cultivar 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 drought was applied for 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 leaves. 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 cultivars as compared to the control plants, but this difference occurred sooner in SS2613. The most striking result regarding the carbohydrates and polyols was the increase of inositol which occurred more rapidly and was much more important in Sullu than in SS2613. In parallel, response to drought on gene expression was mainly analyzed regarding carbon and energy metabolism, photosynthesis and amino acid metabolism. Results in 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.
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Lefèvre, I. S., Legay, S., Schafleitner, R., Hausman, J.-F., & Evers, D. (2009). Potato response under drought exposure. FNRS Contact Group, Plant Biology: from gene to function, Plants and their soil environment, Gembloux, Belgium. https://hdl.handle.net/2078.5/159114