Effect of ascorbic acid (Vitamin C) and alpha-tocopherol(Vitamin E) on seed deteriorations of two sesame (Sesamum indicumL.) cultivars

Document Type : Original Article

Abstract

In order to evaluate the effects of ascorbic acid and alpha-tocopherol on seed deterioration process of two sesamum cultivars Darab2 and Darab14,this study were carried out as a factorial experiment hn a randomized completedesign with three replication at seed laboratory of Agronomy and Plant Breeding department, College of Agriculture, University of Tehran (Karaj) during 2012-2013. First, germination characteristic measured and then seeds were aged through controlled deterioration test. Treatments including: two sesame cultivars; 2 levels of deterioration with controlled; and 6 concentrations of ascorbic acid and alpha-tocopherol (50, 100, 150mg/lit for ascorbic acid and, 20, 40, 60mg/lit for alpha-tocopherol) with control. The measured characteristics, including: germination percentage (%), germination index (GI), mean germination time (MGT), vigor1 and vigor2. Vitamins treatments were applied to both pre-treatmentand post-treatment in two separate experiments were used. The result showed that seed deterioration in both level (24 and 48 hr) reduced seed traits Vitamin concentrations in two conditions pre-treatment and post-treatment, investigated characteristics for two cultivars improvement and prevailing deterioration had taken place. But, in pre-treatmentand with the vitamin concentration,allconcentration of ascorbic acid and alpha-tocopherol at time deterioration of 24 hr had better results for two cultivars and not significantlywithcontrolled treatment (except for the concentration of 40 mg/liter alpha-tocopherol for Darab2).in pre-treatmentandcondition andat time deterioration of 48 hr, 150mg/liter ascorbic acid with germination percentage (%)=93/33, vigor1=645/8, vigor2=2/427 and GI=84/33 (for Darab2), and 100 mg/liter ascorbic acid with germination(%)= 80/67, vigor1=404/4, vigor2=2/313 and GI=55/33 (for Darab14) was the bestconcentration in this study.

Keywords

References

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