M. Jain et al., Ameliorative effects of proline on salt stress-induced lipid peroxidation in cell lines of groundnut (Arachis hypogaea L.), PL CELL REP, 20(5), 2001, pp. 463-468
Cell lines of a salt-sensitive cultivar of groundnut (Arachis hypogaea L. c
v. JL24) were selected on media amended with high NaCl concentrations. Comp
arative analyses of the water status and ionic relations of salt-sensitive
and salt-tolerant cell lines showed a decrease in the water potential (psi
(w)) and solute potential (psi (pi)) with increases in salt stress. However
, the maintenance of cellular turgor indicated active osmotic adjustments i
n response to salinity stress. In addition to the extrusion of Na+ in the N
aCl-selected cell lines, a significant accumulation of proline was observed
, which was probably associated with osmotic adjustments and the protection
of membrane integrity. The addition of proline to the culture medium allev
iated the salt stress-induced decline in fresh weight accumulation and redu
ced peroxidative damage to the lipid membranes, both in a concentration-dep
endent manner.