Screening of six barley varieties for drought resistance by using leaf water potential, membrane stability, and phosphatasic activity parameters
1997
Ben Naceur, M'B. (Institut National de la Recherche Agronomique de Tunisie, Ariana-Tunis (Tunisia)) | Paul, R. (Faculte des Sciences Agronomiques de Gembloux (Belgique)) | Ben Salah, H.
The ability of six barley varieties to withstand water deficit was assessed by studying the leaf water potential, cell membrane integrity and the acid phosphatasic enzymes activity. Under drought conditions, Martin variety maintained and adequate leaf water potential, however Roho performed poorly under these conditions. The cell membrane integrity of Martin, Faiz and Tej was less affected by drought or induced osmotic shock by polyethylene glycol (PEG), than Raihane, Aurore-Esperance and Roho varieties. For the enzymatic activity, we observed and increase of phosphatasic activity for both Aurore-Esoerance and Roho varieties only. Changes in water regimes induced different reactions in plant acid phosphatase. Varieties, with greater sensitivity to water stress showed an increase in these enzymes under stressed conditions.
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