Incorporation of 14C in Biochemical constituents in pea plants U nder the interaction effect of salinity and gamma-Radiation

Pea (Pistun sativtun, var, Licoln) plants were raised in a greenhouse in small pots and kept for 30 days at normal condition (control) or under the effect of soil salinity (89 ds/m) and /or gamma irradiated seeds (10 Gy). Photosynthetic activity in addition to the distribution of 14C-in soluble sugars total lipids and into other components was studied; also protein amino acids were analyzed. photosynthetic activity was reduced by salinity and vice versa gamma radiation relative to control. At first time the highest radioactivity was detected in soluble sugars, then decreased by the time, while, increased in either lipids or protein and other components up to 24 h following exposure to 14 CO2. Amino acid analysis shows that there is four common amino acids; the amino acid methionine responsible for peptide synthesis disappeared under salinity treatment, while arginine and phenylalanine occurred under the interaction effect of salinity and radiation