Effect of different Gamma radiation doses on the growing of the Achmrar local fig variety Ficus carica L. in Morocco

Abstract

 This research was carried out in order to determine GR50 dose which reduces the growing of 50% as compared to control and give rises to mutation at the fig tree which were irradiated with five different Gamma doses (20, 40, 60, 80, and 100 Gy). The bud cutting irradiated with different doses were prepared and then rooted in greenhouse for three months. Results showed that chlorophyll leaf content decreased with increasing radiation doses, 44, 60 mg.g-1 to 24,53 mg.g-1 for control and 100 Gy doses respectively. Is was also found that average leaf area and stomatal conductance values deceased compared to the control its varied for the leaf area 65,75 cm2 for control to 23,95 for the 100 Gy doses, and for stomatal conductance to 557,68 mmol/m2s control to 75 mmol/m2s for 100 Gy doses. As a result, GR 50, dose was found as 62 Gy for fig variety.