Bangabandhu Sheikh Mujibur Rahman Agricultural University is a government-financed 13th public university of Bangladesh and third agricultural university after Bangladesh Agricultural University and Sher-e-Bangla Agricultural University. It is located at Salna, Gazipur. Wikipedia.
Alam G.M.M.,University of Southern Queensland |
Alam G.M.M.,Bangabandhu Sheikh Mujibur Rahman Agricultural University
Environmental Management | Year: 2017
Rural riverine households in Bangladesh are confronted with many climate-driven hazards, including riverbank erosion, which results in loss of productive land and other natural resources of the riverine households, and thus threatens their livelihoods and food security. This study assesses the main drivers of vulnerability and livelihood cycle of vulnerable riparian households in Bangladesh. The study utilises the IPCC framework of vulnerability and develops a weighted approach by employing the livelihood vulnerability index and the climate vulnerability index. The results reveal that the livelihood vulnerability index and the climate vulnerability index differ across locations, however, a high index value for both measures indicates the households’ high livelihood vulnerability to climate change and hazards. The main drivers that influence the vulnerability dimensions are livelihood strategies and access to food, water and health facilities. These hazard-prone households are also vulnerable due to their existing low livelihood status that leads to a vicious cycle of poverty. The findings of this study are crucial for policymakers to formulate and implement effective strategies and programs to minimise vulnerability and to enhance the local adaptation processes in order to improve such households’ livelihood across Bangladesh. © 2017 Springer Science+Business Media New York
Akter N.,Bangabandhu Sheikh Mujibur Rahman Agricultural University |
Rafiqul Islam M.,Bangabandhu Sheikh Mujibur Rahman Agricultural University
Agronomy for Sustainable Development | Year: 2017
Increasing temperature and consequent changes in climate adversely affect plant growth and development, resulting in catastrophic loss of wheat productivity. For each degree rise in temperature, wheat production is estimated to reduce by 6%. A detailed overview of morpho-physiological responses of wheat to heat stress may help formulating appropriate strategies for heat-stressed wheat yield improvement. Additionally, searching for possible management strategies may increase productivity and sustainability of growing wheat. The major findings from this review are as follows: (1) heat stress significantly reduces seed germination and seedling growth, cell turgidity, and plant water-use efficiency; (2) at a cellular level, heat stress disturbs cellular functions through generating excessive reactive oxygen species, leading to oxidative stress; (3) the major responses of wheat to heat stress include the enhancement of leaf senescence, reduction of photosynthesis, deactivation of photosynthetic enzymes, and generation of oxidative damages to the chloroplasts; (4) heat stress also reduces grain number and size by affecting grain setting, assimilate translocation and duration and growth rate of grains; (5) effective approaches for managing heat stress in wheat include screening available germplasm under field trials and/or employing marker-assisted selection, application of exogenous protectants to seeds or plants, mapping quantitative trait locus conferring heat resistance and breeding; (6) a well-integrated genetic and agronomic management option may enhance wheat tolerance to heat. However, the success of applying various techniques of heat stress management requires greater understanding of heat tolerance features, molecular cloning, and characterization of genes. The overall success of the complex plant heat stress management depends on the concerted efforts of crop modelers, molecular biologists, and plant physiologists. © 2017, INRA and Springer-Verlag France SAS.
Mondol M.A.M.,Bangladesh University |
Shin H.J.,Korea Advanced Institute of Science and Technology |
Islam M.T.,Bangabandhu Sheikh Mujibur Rahman Agricultural University
Marine Drugs | Year: 2013
Marine Bacillus species produce versatile secondary metabolites including lipopeptides, polypeptides, macrolactones, fatty acids, polyketides, and isocoumarins. These structurally diverse compounds exhibit a wide range of biological activities, such as antimicrobial, anticancer, and antialgal activities. Some marine Bacillus strains can detoxify heavy metals through reduction processes and have the ability to produce carotenoids. The present article reviews the chemistry and biological activities of secondary metabolites from marine isolates. Side by side, the potential for application of these novel natural products from marine Bacillus strains as drugs, pesticides, carotenoids, and tools for the bioremediation of heavy metal toxicity are also discussed. © 2013 by the authors.
Biswas M.S.,Tottori University |
Biswas M.S.,Bangabandhu Sheikh Mujibur Rahman Agricultural University |
Mano J.,Tottori University |
Mano J.,Yamaguchi University
Plant and Cell Physiology | Year: 2016
Reactive oxygen species (ROS)-triggered programmed cell death (PCD) is a typical plant response to biotic and abiotic stressors. We have recently shown that lipid peroxidederived reactive carbonyl species (RCS), downstream products of ROS, mediate oxidative signal to initiate PCD. Here we investigated the mechanism by which RCS initiate PCD. Tobacco Bright Yellow-2 cultured cells were treated with acrolein, one of the most potent RCS. Acrolein at 0.2 mM caused PCD in 5 h (i.e. lethal), but at 0.1 mM it did not (sublethal). Specifically, these two doses caused critically different effects on the cells. Both lethal and sublethal doses of acrolein exhausted the cellular glutathione pool in 30 min, while the lethal dose only caused a significant ascorbate decrease and ROS increase in 1-2 h. Prior to such redox changes, we found that acrolein caused significant increases in the activities of caspase-1-like protease (C1LP) and caspase-3-like protease (C3LP), the proteases which trigger PCD. The lethal dose of acrolein increased the C3LP activity 2-fold more than did the sublethal dose. In contrast, C1LP activity increments caused by the two doses were not different. Acrolein and 4-hydroxy-(E)-2-nonenal, another RCS, activated both proteases in a cellfree extract from untreated cells. H2O2 at 1mM added to the cells increased C1LP and C3LP activities and caused PCD, and the RCS scavenger carnosine suppressed their activation and PCD. However, H2O2 did not activate the proteases in a cell-free extract. Thus the activation of caspase-like proteases, particularly C3LP, by RCS is an initial biochemical event in oxidative signal-stimulated PCD in plants. © The Author 2016.
Islam Md.T.,University of Gottingen |
Islam Md.T.,Bangabandhu Sheikh Mujibur Rahman Agricultural University |
Von Tiedemann A.,University of Gottingen |
Laatsch H.,University of Gottingen
Molecular Plant-Microbe Interactions | Year: 2011
The motility of zoospores is critical in the disease cycles of Peronosporomycetes that cause devastating diseases in plants, fishes, vertebrates, and microbes. In the course of screening for secondary metabolites, we found that ethyl acetate extracts of a marine Streptomyces sp. strain B5136 rapidly impaired the motility of zoospores of the grapevine downy mildew pathogen Plasmopara viticola at 0.1 μg/ml. The active principle in the extracts was identified as staurosporine, a known broad-spectrum inhibitor of protein kinases, including protein kinase C (PKC). In the presence of staurosporine (2 nM), zoospores moved very slowly in their axis or spun in tight circles, instead of displaying straight swimming in a helical fashion. Compounds such as K-252a, K-252b, and K-252c structurally related to staurosporine also impaired the motility of zoospores in a similar manner but at varying doses. Among the 22 known kinase inhibitors tested, the PKC inhibitor chelerythrine was the most potent to arrest the motility of zoospores at concentrations starting from 5 nM. Inhibitors that targeted kinase pathways other than PKC pathways did not practically show any activity in impairing zoospore motility. Interestingly, both staurosporine (5 nM) and chelerythrine (10 nM) also inhibited the release of zoospores from the P. viticola sporangia in a dose-dependent manner. In addition, staurosporine completely suppressed downy mildew disease in grapevine leaves at 2 μM, suggesting the potential of small-molecule PKC inhibitors for the control of peronosporomycete phytopathogens. Taken together, these results suggest that PKC is likely to be a key signaling mediator associated with zoosporogenesis and the maintenance of flagellar motility in peronosporomycete zoospores. © 2011 The American Phytopathological Society.
Hossain M.Y.,University of Rajshahi |
Alam M.J.,Bangabandhu Sheikh Mujibur Rahman Agricultural University
Ribarstvo, Croatian Journal of Fisheries | Year: 2015
The Gray eel catfish Plotosus canius is a vulnerable species in Bangladesh. The wild populations are declining as a result of over-exploitation, destruction of spawning grounds, various ecological changes in their natural habitats, and lack of appropriate management. Establishment of suitable sanctuaries in selected areas of estuaries, streams, canals and lakes is suggested for the conservation of the populations. © The Author(s) 2015. Published by University of Zagreb, Faculty of Agriculture. All rights reserved.
Ahmed J.,Bangabandhu Sheikh Mujibur Rahman Agricultural University |
Hasan M.,Bangabandhu Sheikh Mujibur Rahman Agricultural University
Bangladesh Journal of Botany | Year: 2011
Seedling of 20 wheat genotypes were grown in Phytotron at about 25 and 35°C for measuring membrane injury in per cent and seedling proline content to investigate seedling proline as screening criterion against heat stress. The wheat genotypes (Bijoy, Sufi, Kanchan, Fang 60, BAW 1059, BL 1883, BL 1022, IVT 7, IVT 8, IVT 9, IVT 10 and BAW 917) showing < 50% membrane injury were grouped as heat tolerant (HT) and the genotypes (Shatabdi, Prodip, BAW 1064, Gourab, Pavon 76, Sonora, Kalyansona and IVT 6) showing ≥ 50% membrane injury were classified as heat sensitive (HS). At high temperature (35°C) the HT genotypes produced more than double (> 200%) proline than that of 25°C but the HS genotypes produced less quantity of proline at 35°C compared to that in HT genotypes. The seedling proline content at 35°C and membrane injury (%) maintained a significant negative correlation (r = -0.619**) across the 20 wheat genotypes tested.
Rahman A.N.M.A.,Bangabandhu Sheikh Mujibur Rahman Agricultural University
Biotechnology | Year: 2010
The Intracytoplasmic Sperm Injection (ICSI) is a kind of micromanipulative technique in which a single sperm is directly injected into the ooplasm of a matured oocyte using a microscopic needle. It is a type of in vitro fertilization which is mainly used to treat severe male factor infertility in human. This procedure can bypass many barriers of fertilization including the process of sperm penetration through cumulus-corona cells, zona pellucida and oolemma during fertilization by directly depositing the sperm into the ooplasm. The introduction of ICSI in assisted reproduction has helped to investigate and understand the early events of fertilization such as sperm capacitation, the acrosome reaction and pronucleus formation. Like humans, domestic animals including goats, suffer from infertility or sub-fertility, which lowers their lifetime productivity and reduces the number of offspring that could be obtained from a sire or dam. The prevalence of this problem coupled with the desire of people to understand and subsequently control the reproductive processes has led to the development of novel assisted reproductive technologies (ARTs) like ICSI. It is one of the modern ART which can be used in livestock for the improvement and preservation of livestock genetics and the enhancement of reproductive efficiency. Till now, ICSI technique - one of the modern ARTs - has been successfully used in humans, rodents and other animals, especially in the cattle. The present study describes different aspect of ICSI including history, types of micromanipulative techniques, remodeling of fertilization process, oocyte activation and factors affecting outcomes of ICSI etc. © 2010 Asian Network for Scientific Information.
Rahman M.M.,Bangabandhu Sheikh Mujibur Rahman Agricultural University
Environmental Science and Pollution Research | Year: 2013
Malaria continues to be a public health problem in Bangladesh, despite efforts in the 1960s to eradicate the vectors through the use of DDT. At one point, eradication of malaria was acclaimed but later on it reappeared. The use of DDT is no more legally allowed in Bangladesh, which has been officially replaced by a number organophosphates and/or synthetic pyrethroids and their combinations in addition to the integrated vector management (IVM) package. IVM being a community approach is still to go a long way to be mass popular. Adulticides, larvicides, residual sprays, mosquito coil, insecticide-impregnated curtain, aerosol, etc. still serve as the major weapons of mosquito control. Thus, mosquito control still mostly depends on chemical insecticides. Although the use of DDT is banned in Bangladesh, there are reports on its illegal use in different forms. Moreover, there is tons of leftover DDT in Bangladesh, which is likely to cause several diseases. As per one report, about 500 MTs of DDT stockpiles are lying in the Medical Sub-Depots at Chittagong for over a period of 26 years. DDT is a persistent organic pollutant pesticide, which can cause diseases like cancer, endocrine disorder, disruption of immune system, embryonic abnormality, reproductive disorder, etc. Other chemical insecticides, which are replacing DDT, are also not free of hazardous impacts. IVM thus appears to be a wise approach requiring concerted efforts for the management of mosquito to control malaria. Such an IVM comprises use of Bacillus thuringiensis Berliner var. israelensis, methoprene, biocontrol agents, cleaning of breeding sites, pyrethroid-impregnated curtain, etc. Therefore, a wise effort should be adopted to completely stop the use of DDT, eliminate its stockpiles wherever they are in Bangladesh and to popularise the IVM, not the chemicals-based alternatives throughout the country. © 2012 The Author(s).
Fakhrul Islam S.M.,Bangabandhu Sheikh Mujibur Rahman Agricultural University
International Journal of Sustainable Society | Year: 2011
Intrusion of saline water and soil salinity is a major threat of climate change to agriculture. Rice is the most important crop affected by salinity in the coastal area of Bangladesh. The objective of this paper is to develop tools for ex ante cost-benefit assessment, with an integration of knowledge of farmers, industry experts and scientists to develop new salinity and drought resistant (SDR) transgenic rice variety. Total incremental benefits of introducing SDR transgenic rice to replace traditional varieties are expected to be $948 ha-1 yielding a net benefit of $934 ha -1. The introduction of transgenic SDR rice in Bangladesh would have sizable social benefits. The total amount of nondiscounted economic surplus from producing SDR transgenic rice over 10 years is projected at US$188 million with a producer surplus of $114 million. The internal rate of return (IRR) is 34% with a net present value (NPV) of $117 million. © 2011 Inderscience Enterprises Ltd.