DSpace Collection: An Annual Journal of Department of Botany, University of North BengalAn Annual Journal of Department of Botany, University of North Bengalhttp://ir.nbu.ac.in/handle/123456789/43952024-03-28T19:10:40Z2024-03-28T19:10:40ZAntagonism of fluorescent Pseudomonas BRL-1 against Curvularia lunataSen, S.Tahsin, K.S.Acharya, K.http://ir.nbu.ac.in/handle/123456789/44042022-06-01T21:05:46Z2008-03-01T00:00:00ZTitle: Antagonism of fluorescent Pseudomonas BRL-1 against Curvularia lunata
Authors: Sen, S.; Tahsin, K.S.; Acharya, K.
Abstract: A potato rhiszospheric isolate, fluorescent Pseudomonas BRL-I, showed in vitro antagonistic activity against Curvularia lunata. Microscopic studies of the mycelium after antagonism illustrated hyphal shriveling, swelling, vaculation, short branching and granulation of cytoplasm resulting in lysis of hyphae of C. lunata.. Association of antagonistic property of the isolate has been found to be coupled with chitinolytic and proteolytic activity as weii as by the production of indole acetic acid and spiderophore.2008-03-01T00:00:00ZEthnic uses of some pteridophytic weeds of tea gardens in Darjeeling and TeraiGhosh, C.Biswas, R.Das, A.P.http://ir.nbu.ac.in/handle/123456789/44032022-06-01T21:05:44Z2008-03-01T00:00:00ZTitle: Ethnic uses of some pteridophytic weeds of tea gardens in Darjeeling and Terai
Authors: Ghosh, C.; Biswas, R.; Das, A.P.
Abstract: Pteridophytes occupy a recognisable position in the flora of Terai and the hills of Darjiling. They are also well represented as weed in the Tea Gardens of this area. Recent survey recorded the occurrence of 86 species of pteridophytes from nine such gardens covering both Terai and Darjiling Hills. Of these, 25 species (30%), covering 21 genera and 20 families, are used by the Tea Garden workers in different manner like (i) 10 species as food, (ii) 02 species for fermenting traditional liquor, (iii) 01 species as fodder and (iv) 22 species as medicine for human diseases. In addition, some of these plants are used for basketry, playing carom, ceremonial decoration, ornamentals etc.2008-03-01T00:00:00ZInfluence of culture media and environmental factors on mycelial growth, sporulation and spore germination behaviour of Curvularia eragrostidis (P. Hennings) MayerSaha, A.Dasgupta, S.Mandal, P.Saha, D.http://ir.nbu.ac.in/handle/123456789/44022022-06-01T21:05:43Z2008-03-01T00:00:00ZTitle: Influence of culture media and environmental factors on mycelial growth, sporulation and spore germination behaviour of Curvularia eragrostidis (P. Hennings) Mayer
Authors: Saha, A.; Dasgupta, S.; Mandal, P.; Saha, D.
Abstract: Curvularia eragrostidis is a foliar fungal pathogen of young tea plants. It causes leaf spot disease of tea. Mycelial growth, sporulation and spore germination behaviour of the pathogen were studied. Six different media were tested for mycelial growth. Among these, potato carrot agar (PCA) was found best for the mycelial growth and sporulation. Maximum mycelial growth was attained after 15 days of incubation. Mycelial growth was also studied in different temperatures and pH. Optimum temperature of growth was 25 °C and best growth was obtained at pH 6.0. Glucose and peptone were best carbon and nitrogen sources respectively for growth and sporulation of the fungus. The optimum conditions of spore germination were found to be at pH 7.25 and at incubation temperature of 25 °C.
Keywords: Sporulation; Curvularia eragrostidis; Mycelial growth, fungus2008-03-01T00:00:00ZBacterial strain isolated from the Mango field and identified on the basis of 16S rDNA sequence information and optimization of the alkaline cellulase productionRoy, S.C.Chattopadhyay, A.http://ir.nbu.ac.in/handle/123456789/44012022-06-01T21:05:41Z2008-03-01T00:00:00ZTitle: Bacterial strain isolated from the Mango field and identified on the basis of 16S rDNA sequence information and optimization of the alkaline cellulase production
Authors: Roy, S.C.; Chattopadhyay, A.
Abstract: A bacterial strain was isolated from the soil of mango (Mangifera indica) orchards. The isolate
was identified as Paenibacillus ahvei [MTCC 7809] through phylogenetic analysis based on the 16S
rDNA gene sequencing and also by conventional biochemical processes. The scanning electron
microscopic analysis revealed the morphological details of the strain. The isolate is Gram positive.
motile, rod shaped, spore forming bacterium with extreme salt tolerance. It can hydrolyze starch and
gelatin, and catalase and oxidase were produced. The cellulase activity of the culture broth was determined
by measuring the reducing sugar released from carboxymethyl cellulose (CMC). Different cultural
conditions were tested to reach the optimum growth conditions in order to obtain large-scale production
of alkaline cellulase for commercial importance. Crude cellulase from Paenibacillus alvei (MTCC 7809)
showed activity and stability at moderately high temperature and pH and the activity remained stable at
40°C and pH 8 after 2h of incubation making the strain a good choice for industrial applications. The
rDNA sequence of 1509bp is submitted into the NCBI GenBank database (Acession no. EF429201).2008-03-01T00:00:00Z