The effect of electromagnatic current on Mitotic Index for cell of apical marestiems for roots of Cucumis sativus L.

Abstract

The experiment was conducted at physiology laboratory of the higher studies in the department of Biology at Ibn Al.Haitham – College of Education-Baghdad University on the 15th 82010. The experiment was designed as Completely Randomised Design(CRD) The seeds of 3 species of American cucumber,they were:-1- Lot Number (EM285),2- Hyrid Super Green F1,and 3-ToCAEEN F1 were exposured for 2 types of physical effects, they were : 1- 4 frequencies of electric current (0,1,2, 2.5)Am for 5 min. for each freq.( 2-4) exposure periods to UV (0,30,60,90) sec.in (254)nm of frequency.The cucumber seeds were planted in pettry dish that contains a layer of wet cotton 10 seeds for each exposure,and after 7 days the apical roots , had kept in Carnoys fluid.Then they were put in tubes contains 3 ml. of HCL(1N) then in a water bath.After that, it dyed with Folgen stain then some of the cytological characteristics had been studied :- divided cells, Mitotic Index.Results showed that, the species(3) had a significant increase in the studied chara- cteristics compared with 1and 2 species,under the frequency 2.5Am and the exposure per- iod forUV 90 at all interaction