• R. Desingh

Antioxidant enzyme activities and foliar contents of ascorbate, proline, glycine betaine and abscisic acid (ABA) were determined in C. junghuhniana (CSIRO 19491) subjected to salinity stress (Mixed salts: NaCl, MgSO4 and CaCl2) of different concentrations (0, 50, 100, 150mM). Sampling was done after 35 days of treatments in leaves (needles). The activities of antioxidant enzymes which include superoxide dismutase (SOD), catalase (CAT), ascorbate peroxidase (APX), peroxidase (POD) and glutathione reductase (GR) were significantly high in the salinity stressed leaves. Higher contents of ascorate (AsA) and monodehydroascorbate (MDA) were observed in the leaf extracts of plants under salinity treatments. Quantitative differences were also noticed in foliar proline, glycine betaine and ABA contents with response to salinity. The leaves accumulated more proline, glycine betaine and ABA under salinity stress. Our data demonstrate that C. junghuhniana have efficient antioxidative characteristics and ABA accumulation which could provide better protection against oxidative stress in leaves under salinity stressed conditions.

Abscisic acid, antioxidant enzymes, ascorbate, casuarina, compatible solutes, salinity stress

"DIFFERENTIAL RESPONSES IN SEEDLINGS OF CASUARINA JUNGHUHNIANA Miq. TO SALINITY STRESS", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 3, page no.264-279, March-2019, Available :http://www.jetir.org/papers/JETIR1903I43.pdf

"DIFFERENTIAL RESPONSES IN SEEDLINGS OF CASUARINA JUNGHUHNIANA Miq. TO SALINITY STRESS", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 3, page no. pp264-279, March-2019, Available at : http://www.jetir.org/papers/JETIR1903I43.pdf