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Articles by Md. Sirajul Islam
Total Records ( 2 ) for Md. Sirajul Islam
  Md. Fazlul Islam , S.M. Rezaul Karim , S.M.A. Haque , Md. Sirajul Islam and Md. Sirajul Islam
  A pot experiment was conducted to study the effect of Echinochloa crusgalli and Echinochloa colonum on the growth and yield of rice (cv. IR50) during April to July 2002. The results showed that the effect of two weeds pot-1 produced 70.6% yield loss of rice grain and about 97% grain yield was reduced when 8 weeds competed against a single rice plant. The reduction of rice grain at this density was the results of 42.9% reduction of plant height, 92% reduction of LAI, 72.7% reduction of tillers plant-1, 88.5% reduction of panicles/plant and 63.8% reduction of grains panicle-1. Further increase of weed density produced the self-thinning effect of weeds and rice yield increased in comparison to 8 weeds pot-1. It was concluded that Echinochloa crusgalli and E. colonum produced similar effects on grain yield and other plant characteristics of rice.
  Iqbal Kabir Jahid , Md. Mahmud Hasan , Mohammad Abdul Matin , Zahid Hayat Mahmud , Sucharit Basu Neogi , Md. Hafiz Uddin and Md. Sirajul Islam
  Polyphosphate provides a substitute for ATP and energy source when phosphorus is a limiting resource in nature. The present study focuses on the role of polyphosphate for the survival of Vibrio cholerae in the aquatic habitats as an autochthonous bacterium. The survival advantages of polyphosphate of V. cholerae O1 having (wild type) and lacking (mutant) polyphosphate kinase (ppk) gene in surface water and with Anabaena variabilis were compared by cultural, Direct Fluorescent Antibody (DFA) and polymerase chain reaction methods in natural water microcosms. The microcosm's water was prepared by filtering and physicochemical parameters were also investigated by standard methods. The results revealed that both fresh and saline water, the wild type strain enhanced survival in cultural conditioned than ppk mutant strain. However, Fluorescent Antibody Direct Viable Counts (FADVC) and Polymerase Chain Reaction (PCR) results noted both strains have the equal survival strategy in viable but nonculturable state (VNC). In conclusion, it could be hypothesized that the polyphosphate inclusion body might keep cultivable and survivable at low phosphate natural environment of the aquatic bacterium.
 
 
 
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