Effect of gamma irradiations on seed germination and seedling survival of Stevia rebaudiana Bert.

Abstract

Stevia rebaudiana

 

 

Stevia rebaudiana

 

 

Stevia started simultaneously 7 days after sowing. Differences

in the germination and survival percent were recorded in the first generation.

High dose of Gamma irradiation increased delay in days of germination

and maturity. The germination and survival percent decreased with increasing

dosage of gamma radiations. The data on days to germination, germination

percentage and survival percentage, indicated that low dose of

gamma radiation had very less effect on germination of

 

Stevia seeds. It was

noticed that up to 5 to 10 KR dose there was no statistically significant difference

in seed germination as compared to control. However, germination

percentage was significantly affected by higher doses of gamma rays.

seeds. The seeds were given 5, 10, 15, 20, 25 and 30 KR

(Kiloradians) exposures. Gamma irradiated seeds were treated with sodium

azide and colchicines solution for 4 h separately. Germination in control and

treated seeds of

 

Bert. produces sweet steviol glycosides in the leaves. Current

investigation was carried out to study effects of gamma irradiations on