No abstract

The attitude of the Saharan variety tadalaghte of Phaseolusvulgaris L. Beanin presence of growing doses of NaCl shows it can be able to stand moderate doses of this salt. The lack in water caused by the osmotic pressure in the root environment does not prevent this variety from being supplied with water, by carrying out an osmo-control and a complete osmotic adjustment to ensure maintain of a suitable level of tissues hydration. In nutritional terms, the presence of Na+ prevents the absorption of K+ and Ca+; but in that specific case, we notice the presence of K+ in leaves in quantities that are higher than those in roots. This massive transfer of K+ from roots that empties its K+ in favour of leaves seems to be a strategy of ionic control and maintain of a correct physiological activity. In general, levels of chlorophyll (a) and (b) decrease with the increase of salinity concentration. Our obtained results show an increase in DNA and RNA rate of our variety under the influence of saline stress. Salinity reduces the speed of cellular development and the protein and RNA synthesis in apricot leaves (Phaseolus vulgaris L.).