) Phaseolus vulgaris L.( دراسة فسيولوجية مقارنة في التحمل الملحي لنباتي الفاصولياء ) Vigna sinensis L. ( واللوب

A comparative physiological study on the salt tolerance of two plants kidney bean (Phaseolus vulgaris L .) and cow pea (Vigna sinensis L.)

Abstract

A comparative physiological study was conducted on the salt tolerance of two plants from Leguminosae family were kidney bean (Phaseolus vulgaris L.) and cow pea (Vigna sinensis L.) , the study was including the effect of
different concentrations (50 , 100 , 150 , 200) mMol / l of sodium chloride (NaCl) salt solution in addition of distill water as a control treatment , in the germination of seeds and concentrations of total sugar , reduced sugar , sucrose and starch , also the study included some chemical and physical properties of the used soil in the agriculture were the moisture of field capacity , the percentage of saturated humidity , soil texture , the value of ( pH ) and ( EC ) and the concentrations of some mineral ions (Na+, K+, Ca++ , Mg⁺⁺ , Cl^-,HCO₃^-, CaCo₃⁼ , SO₄⁼, CO₃⁼, PO₄^≡ ) , organic carbon and organic matter . The results were showed that , the increases of salinity concentrations causes a decrease in the percentages of seed germination of the both plants , the high percentages of germination were noticed at a
control , whereas the low percentages at the salinity treatment (200) mMol / l of the plants seed , also causes an increase on the concentrations of total sugar , reduced sugar and sucrose and the high concentrations of them at the salinity treatment (200) mMol / l .