Effects of combined salt and flooding stresses on the growth and physiological behavior of alfalfa (Medicago sativa L.)
| Autor: | Ayda Khadri, Samira Aschi-Smiti, Hajer Sghaier, Achref Aloui, Renaud Brouquisse |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
0301 basic medicine Sinorhizobium meliloti biology food and beverages Photosynthesis biology.organism_classification 01 natural sciences Salinity 03 medical and health sciences Horticulture chemistry.chemical_compound 030104 developmental biology chemistry Germination Chlorophyll Proline Medicago sativa General Agricultural and Biological Sciences Legume 010606 plant biology & botany |
| Zdroj: | African Journal of Agricultural Research. 16:758-764 |
| ISSN: | 1991-637X |
| DOI: | 10.5897/ajar2020.14831 |
| Popis: | The present work focused on evaluation of the physiological and metabolic behavior of alfalfa (Medicago sativa L., var. Siriver), when faced with two important ecosystems constraints, namely salinity and flooding-associated hypoxia. After germination, seedlings in symbiosis with Sinorhizobium meliloti were grown on different salt concentrations (0, 20 and 50 mM NaCl). At four weeks post-germination, plants were submitted to a five-day long flooding treatment and then analyzed for various physiological (growth, biomass) and biochemical (proteins, chlorophylls, ions, proline) parameters. Our results showed that when M. sativa was cultured on moderate (20 mM NaCl) or average (50 mM NaCl) salt stress, the classical mechanisms of stress response (ions and proline accumulation) are set up and the growth (FW, DW, growth of aerial parts) was moderately affected by salt. In a situation of average salt stress (50 mM NaCl), the combined salinity and short-term flooding led to an early alteration of the photosynthetic machinery and a modification of ions and proline contents in the leaves. Key words: Chlorophyll, hypoxia, legume, NaCl, proline, salinity. |
| Databáze: | OpenAIRE |
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