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Articles by R. Alam
Total Records ( 5 ) for R. Alam
  M.Z. Karim , M.N. Amin , M.A. Hossain , S. Islam , Faruk Hossin and R. Alam
  Protocol for induction of callus and regeneration response of two sugarcane varieties (Isd-16, Isd-28) was established through callus culture using leaf sheath. Multiple shoot regeneration at various frequencies was observed using different concentrations and combinations of growth regulators. The highest percentage of callus induction was observed in the medium containing 3.0 mg l -1 2,4-D with 10% coconut water (CM). The best response in terms of multiple shoot formation was observed that on MS medium supplemented with BAP 1.0 mg l -1 +IBA 0.5 mg l -1. NAA (3.0 mg l -1) was found effective in the production of roots. The variety Isd-16 showed better response than the variety Isd-28 towards shoot multiplication. Seventy percent of the plantlets produced from in vitro culture method survived in the ex vitro condition.
  M.Z. Karim , M.N. Amin , M.A.K. Azad , F. Begum , M.M. Rahman , M.M. Islam and R. Alam
  Shoot multiplication of Chrysanthemum morifolium was achieved from the nodal and shoot tip explants of mature plant using MS medium with different concentrations and combinations of growth regulators. Maximum frequency of explants produced axillary shoot and the highest number of shoots per explant were obtained when MS medium fortified with 1.0 mg l-1 BAP.The combination BAP+GA3 was found effective result. But Kinetin (Kn) showed low performance for producing multiple shoots. The degree of shoot formation was affected by explant types and the exogenous hormonal regime in the medium.
  R. Baksha , R. Alam , M.Z. Karim , Sk. A. Mannan , B.P. Podder and A.B.M.M. Rahman
  Microshoots were cultured on MS medium supplemented with different combinations of auxin, sucrose and pH level for in vitro rooting of callus induced sugarcane (Saccharum officinarum) variety namely Isd 31. Among the types and concentrations of auxin used the best rooting in all the microshoots was obtained with half strength (major salts) MS basal medium supplemented with NAA at 5.0 mg l‾1, sucrose at 50 g l‾1 and pH level 5.7 were the optimum conditions for rooting when microshoots were incubated 25+ 2°C under 16 h photo period regime. The regenerated plantlets were successfully transferred to soil and the percentage of survivability under ex vitro conditions was 75.
  M.A.I. Chowdhury , M.T. Uddin , M.F. Ahmed , M.A. Ali , S.M.A. Rasul , M.A. Hoque , R. Alam , R. Sharmin , S.M. Uddin and M.S. Islam
  Untreated groundwater, often enriched in arsenic-one of the most important pollutants and trace elements of the aquatic system recently regarded as the major threat to drinking water-was and is being extensively used as a source of drinking for the decades in rural and semi-urban areas of the developing countries which results in a high incidence of arsenic with deleterious effects on humans and food chain. In Bangladesh, India, Vietnam and other developed countries, arsenic contamination in groundwater is considered to be the key environmental health problem of the twenty first century. In Bangladesh arsenic was first detected in the district of Chapai Nawabgonj bordering the West-Bengal district of India in 1993; since then higher levels of arsenic (exceeding the WHO standard of 0.01 mg L-1 and Bangladesh standard of 0.05 mg L-1) have been detected in many regions of the country including 61 districts out of 64. It is estimated that of the 140 million inhabitants of Bangladesh more than 100 million are at the risk of arsenic hazard, such arsenic hazards collapses the societal structure and socio-economic backbone of poor people of rural Bangladesh. The study tries to discuss the chronological extent and severity of the biggest global arsenic calamity prevailed in Bangladesh, socio-economic impact of arsenic hazard on the poor people of rural society living more than seventy percent under poverty limit in Bangladesh. Specially due consideration was given on the socio-economic impact on arsenic victims particularly earning male family member, young male, married female and young female going to be married as well as arsenic affected family and their interaction with non-arsenic-victim of the society.
  R. Baksha , R. Alam , M.M. Kamal , B.P. Podder and A.B.M.M. Rahman
  Among two different Saccharum species viz; Saccharum officinarum (varieties/ lines Isd 16, Isd 20, Isd 24, Isd 28, BC4 and Saccharum spontaneum (line S 20) were screened against red rot (Colleotrichum falcatum) disease resistance by artificial inoculation following standard plug method. The varieties /lines were graded as various levels of susceptibility and resistance using a standard disease index. Among the varieties/ lines tested Isd 20 and BC4 have shown completely resistant, variety Isd 24, S20 have shown moderately, Isd 16 susceptible and Isd 28 highly susceptible. These varieties/ lines (Isd 20 and BC4) may be utilized as one of the sources of resistance on the breeding programme of sugarcane to red rot disease.
 
 
 
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