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Journal Article
Research Support, Non-U.S. Gov't
Analysis of transcript and metabolite levels in Italian rice (Oryza sativa L.) cultivars subjected to osmotic stress or benzothiadiazole treatment.
Plant Physiology and Biochemistry : PPB 2013 September
One of the major objectives of rice (Oryza sativa L.) breeding programs is the development of new varieties with higher tolerance/resistance to both abiotic and biotic stresses. In this study, Italian rice cultivars were subjected to osmotic stress or benzothiadiazole (BTH) treatments. An analysis of the expression of selected genes known to be involved in the stress response and (1)H nuclear magnetic resonance ((1)H NMR) metabolic profiling were combined with multivariate statistical analyses to elucidate potential correlations between gene expression or metabolite content and observed tolerant/resistant phenotypes. We observed that the expression of three chosen genes (two WRKY genes and one peroxidase encoding gene) differed between susceptible and resistant cultivars in response to BTH treatments. Moreover, the analysis of metabolite content, in particular in the osmotic stress experiment, enabled discrimination between selected cultivars based on differences in the accumulation of some primary metabolites, primarily sugars. This research highlights the potential usefulness of this approach to characterise rice varieties based on transcriptional or metabolic changes due to adverse environmental conditions.
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