Chromosomal Aberrations in <i>Pisum sativum</i> by Magnetic Field, X-Rays and Urea and Their Restitution in Sucrose

Effect of magnetic field on the living cells of Allium cepa L.

“…Ferquencies of cells having different number of nucleoli were also calculated and cells with three nucleoli were found to be completely absent from treated sets (Table 6). Among different morphological shapes, elongate and dumbbell shaped nucleoli were found frequently in treated cells than in control ( A gradual retardation in mitotic index was noted with increase in treatment time which is in conformity with the earlier works (Goswami 1973, Goswami and Dave 1975, Go -swami and Khandelwal 1980). The differences between the mitotic indices of magnetic field treated tissues and that of respective control sets, are found to be highly significant when analysed by statistical t-test.…”

Changes in Chromosome Morphology due to Magnetism

“…6-7). But chromosome breaks, as has been demonstrated earlier (Goswami and Dave 1975) are frequently observed after magnetism (Figs. 4-6) and in certain cells restituted in glucose, a dumble shaped small metacentric chromosome is often detected (Fig.…”

“…Mittler further observed that magnetism does not have any effect on induction of mutation and magnetic field of 10,000 Gauss can not injure chromo somes or interfere with the repair of X-ray induced genetic damage. A magnetic field corresponding to 8000 Oe has recently been observed to cause chromosomal aberrations and certain changes in chromosome morphology (Goswami 1973;Goswami and Dave 1975). This paper, based on repeated trials with diversified material and schedule, reports yet another interesting observation of "prokaryotic condition" in a eukaryotic cell.…”

Effect of magnetic field on chromosomal behaviour of Ophioglossum Linn.

“…He studied the effect of 6000 to 8000 oe (oersted) magnetic field applied for 10 to 15 minutes on the growing root tip of Allium sativum. Subsequent ly Goswami (1977), Goswami and Dave (1975) and Goswami et al (1983) studied the mitotic division in Allium cepa, Vicia faba and Pisum sativum which were subject ed to the magnetic field of 6000-8000 oe to 15 to 20 minutes. They have reported several types of abnormalities in treated material and classified them in to structural and functional abnormalities as regards the response of various taxa.…”