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Articles by Purnendu Gain
Total Records ( 2 ) for Purnendu Gain
  Md. Monirul Islam , Sanjay Kumar Adhikary , Purnendu Gain , Md. Mizanur Rahman and Noor-e-Alam Siddique
  An experiment was conducted to find the effects of different concentrations and combinations of growth regulators viz. 2, 4 D, IAA, α-NAA and Kinetin on callus induction from the anthers of a commercial hybrid rice line IR-69690, developed by Bangladesh Rice Research Institute and subsequent plant regeneration. N6 medium was used as basal medium. Callus induction frequencies in different media combinations ranged from 1.2 to 35.5%. The medium supplemented with 2, 4 D 1 mg L-1, α-NAA 2 mg L-1 and Kinetin 1 mg L-1 was found most effective for callus induction (35.5%). Regeneration of plants from the callus on agarified MS medium supplemented with α-NAA 0.5 mg L-1 and Kinetin 3 mg L-1 was also variable and ranged from 16.7 to 69.3%. Calli derived from the media supplemented with 2, 4 D 1 mg L-1, α-NAA 2 mg L-1 and Kinetin 1 mg L-1 also showed better performance for plant regeneration (69.3%) and among these plants 56.14% were green. However the callus induction medium containing α-NAA 1 mg L-1 and Kinetin 1 mgL-1 directly produced green regenerated plants in higher frequency (70%), without transferring the calli on to the regeneration medium; but rate of callus induction in this medium was very low (6%).
  Purnendu Gain , M.A. Mannan , P.S. Pal , M. Maheb Hossain and S. Parvin
  An experiment was conducted at the green house laboratory of Khulna University, Khulna with a variety of rice BR11, to study the effect of different levels of salinity on some yield attributes of rice. The experiment was conducted with different salinity level e.g., 0, 7.81, 15.62, 23.43 and 31.25 dS m-1. Plant height, number of tillers and the biomass of the plant were recorded. The height of the plant was decreased gradually with increased levels of salinity, but the effect was insignificant from 7.81 dS m-1 salinity level i.e. below this level plant height was not decreased. The tiller number of plants was decreased significantly at 15.62 dS m-1 of salinity level. It was also observed that the biomass of plant decreased significantly from 7.81 dS m-1 level of salinity. The rice variety BR11 could be selected for the cultivation in coastal saline area as it can tolerate salinity at a higher level without significantly decreasing productivity.
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