Potluri, Sasikala D.; Devi Prasad, P.V.
Author Affiliation, Ana.
Department of life Sciences
In-vitro studies on the effects of varying levels of sea-salt on two cassava cultivars
Date of Publication
Auxillary bud cultures of two cassava (Manihot esculenta Crantz) cultivars, UWI-1 and UWI-2, were subjected to salt tress using levels of crude sea salt varying from 0 g to 10g L-1. Planylets were allowed to develop and grow for eight weeks and shoot height, number of nodes and branches, levels of proline in leaf, stem, and root levels of protein, soluble carbohydrate, Na and K in shoot (leaf plus stem) and root, and the activity of the enzyme nitrate reductase in the root and shoot were measured. Salinity levels up to 4g L-1. Low concentrations of salts increased the proline content in the stem and leaf but not in the root . Concomitant with this, the levels of soluble carbohydrates decreased in the shoot while in the roots, the activity was not affected or in some cases it increased. the present results indicated that in the wto cassava cultivars, UWI-1 and UWI-2, salt stress was countered by increased influx of k and synthesis of proline and increased synthesis of carbohydrates in the shoot. It appears that cv. UWI-2 is more tolernat to salt stress than cv. UWI-1.....