Accumulation of  antioxidant Enzymes, Proline, and ions in  Atriplex Nummularia Subsp. seedlings as adaptive mechanisms to salinity

Ibrahem A.A. Almohisen

Volume : IV, Issue : XII, December - 2015

Accumulation of antioxidant Enzymes, Proline, and ions in Atriplex Nummularia Subsp. seedlings as adaptive mechanisms to salinity

Ibrahem A. A. Almohisen

Abstract :

<p>The study aimed to evaluate NaCl concentrations which affect chlorophyll and carotenoid pigments as physiological parameters best reflecting the response of Atriplex nummularia seedlings to salt stress, and investigate after which level the antioxidant enzymes, Proline, and ions contents start to increase and as adaptive mechanisms to salinity. The experiment was conducted on plants grown at 0 , 40, 80 and 120 mM of NaCl. The results show that, the content of chlorophyll&ndash;a and b, total chlorophyll (a+b) and carotenoids decreased significantly with increasing sodium chloride concentration but no differences between 0 mM and 40 mM NaCl treatments, all enzymes activities increased significantly with the exception of Peroxidase(POD) with increasing NaCl level and Sodium(Na) increase ,potassium(K+) decrease with salinity increasing. In conclusion A. nummularia used many mechanisms to overcome salinity stress but increasing catalase(CAT) activity , proline content and ion accumulation are more observable mechanisms in this study.</p>