Combined effects of salt stress and cucurbit downy mildew (Pseudoperospora cubensis Berk. and Curt. Rostov.) infection on growth,physiological traits and antioxidant activity in cucumber (Cucumis sativus L.) seedlings |
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| Institution: | 1. Department of Renewable Resources, University of Alberta, Edmonton, Alberta, Canada;2. Coastal Raintree Consulting, Gibsons, British Columbia, Canada;3. Departamento de Biología Aplicada y Alimentos, Facultad de Agronomía, Universidad de Buenos Aires, Argentina;4. School of Land Science and Technology, University of Geosciences, Beijing, China;5. Department of Integrative Biology, University of Guelph, Ontario, Canada |
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| Abstract: | Abiotic and biotic stresses both decrease quality and quantity of cultivated plants. We compared responses of Cucumis sativus L. cvs Sardes and Beith alpha which were treated with 50 or 100 mM NaCl and/or infected by Pseudoperospora cubensis Berk. and Curt. Rostov.. Both cultivars were affected remarkably when fungus infection was combined with salt stress however; cv Sardes was found out to be relatively tolerant with sustainable growth performance, better leaf water status and lower lipid peroxidation levels under this condition. This relative tolerance could be related to the fine tuning of the activities of the antioxidative enzymes and proline levels. |
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| Keywords: | Salinity Biotic stress Antioxidant enzymes |
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