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Articles by Lutful Hassan
Total Records ( 2 ) for Lutful Hassan
  M.N. Hoque , Lutfur Rahman and Lutful Hassan
  Seed dormancy status was evaluated using agar, MS media and DKW media with or without sugar (3%) in two wild (Jhora 4325 and Wild 4855) and three cultivated (Hab. Aman 2, Jagliboro and Dular) rice genotypes. Jhora 4325 showed strong seed dormancy than the wild 4855 and cultivated rice genotypes. Embryo germination percentage in the studied rice genotypes was higher in agar and MS media than DKW media. Number and percent explants with induced callus was comparatively higher in MS media in combination with 2, 4-D (1.5 mg L-1 2, 4-D) and BAP (0.5 mg L-1) than MS media supplemented with 2, 4-D alone. Embryogenic callus initiation capability of wild rice genotypes was higher than the cultivated genotypes. Embryo germination and callus induction were influenced by concentration of plant growth regulators, culture media and rice genotypes.
  Ahmet Okumu and Lutful Hassan
  Onion chromosomes (Allium cepa L.; 2n=2x=16) were analyzed for karyotype analysis using aceto-orcein staining technique, and classified due to their lengths from long to short arms whether satellite exists or not.The length of arms appeared to be very close to each other and got more force their identification. The length of long arms showed a variation from 5 to 14 μm while short arms have 2 to 10 μm at the early and late stages of mitotic metaphase. The reason of this variation comes from the stages which observed as late prophase in mitosis. This different chromosome length also was affected in regard to the satellite position seen on long chromosome. The folding rate changed between 1.01 to 2.16 due to the smallest total length of chromosomes.
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