PJB-1999-9
RADIOLABELLED (Me-3H) THYMIDINE INCORPORATION INTO DNA IN ROOTS OF COTTON SEEDLING
Q.I. CHACHAR, D.L. LAIDMAN*, J.I. DAVIES*, R.B. MIRBAHAR AND M.A. SETHAR
Abstract
Cotton (Gossypium hirsutum L) Cv. MNH-93 was tested to see the differences in rates of cell division betWeen slow-growing and fast-growing roots by maesuring the (Me-3H) thymidine incorporation into DNA. At early 24 and 36 h germination times, the incorporation of (Me-3H) thymidine into DNA was more in long than in short roots. At germination times after 36h, the incorporation was almost the same in the tips of roots of all lengths. Thymidine incorporation values were markedly higher in younger (24-48h) roots than in older (60-96h) roots.
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