Resumo

JARMA-OROZCO, Alfredo; MERCADO-FERNANDEZ, Teobaldis  e  CLEVES-LEGUIZAMO, Jose Alejandro. EFFECT OF FLOODING ON GROWTH PARAMETERS OF STEVIA (Stevia rebaudiana Bertoni). rev.udcaactual.divulg.cient. [online]. 2015, vol.18, n.2, pp.293-299. ISSN 0123-4226.

Stevia rebaudiana Bertoni, is a plant of recent introduction and cultivation in Colombia, where it is grown in small areas due, among other aspects, to the absence of the knowledge of its sensitivity to prolonged periods of flooding, common in the Department of Córdoba at certain times of the agricultural season. The present study was carried out in order to determine the effects of flooding on some growth variables of this species. The culture was subjected to flooding before, during and after flowering by periods of 6, 12, 24, 48 and 72 hours. The results indicated that in all evaluated physiological states, the plants died after 24 hours of flooding, with significant reductions in leaf area (80%) and number of leaves (30%) at blooming, as well as the total biomass per plant which was reduced by 21%. At the post-flowering physiological stage, hypoxia stress induced a preferential distribution of biomass to the root at the expense of the stem. The results of this study indicate that stevia is a plant, highly susceptible to water stress conditions.

Palavras-chave : Stevia rebaudiana; hypoxia; stress; biomass; leaf area; stevia.

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