Cytotoxic effects of maleic hydrazide during miosis in Allium cepa (l.) varieties Sabale Anjali, Mane Anjali Department of Botany, Sivaji University, Kolhapur-416 004, Maharashtra, India, (e-mail: anjalibs@yahoo.co.in) Online published on 19 March, 2018. Abstract Mutagenic effects of maleic hydrazide (MH) on meiotic chromosomes were analysed;n two Allium cepa (L.) varieties viz.. N-53 and N-2-4-1. Plants raised from the seeds were treated with 100, 500 and 1000 ppm MH for 1, 3, 5 and 12 h. Various meiotic abnormalities and formation of abnormal sporads during meiosis indicated that the effect of MH was persistent and was able to induce pollen sterility in both the varieties. The variety N-2-4-1 was found more sensitive to MH treatment than N-53. A higher concentration and longer exposure to'MH resulted in inducing significant cytological abnormalities during meiosis in A. repa. A remarkable percentage of sterile pollens, clumping, laggards, bridge and ring formation was noticed in pollen mother cells of treted plants. Top Keywords Allium cepa, Chromosomal aberrations, Meiotic abnormalities, MH, Pollen sterility. Top |