Effect of Gamma Rays on Growth and Karyokinetic Activity in Trigonella foenum-graecum L

Abstract

Dry seeds of Trigonella foenum-graecum were exposed to 10, 30 and 60 Kr of gamma rays. Germination was observed first in 60 Kr followed by 30 Kr while in 10 Kr and control germination was simultaneous. There was initial stimulating effect of higher doses on root growth and division frequency but after few days both these were negatively correlated with dose. Frequency of abnormal cells increased with dose. Appearance of chromosomal rings is explained on the basis of telomeric losses and intra arm exchange type. At 60 Kr there was no growth beyond 2 cotyle-donary stage due to adverse effect on cell nuclei in growing region. Differential response of roots, shoots to radiation has been discussed.