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21.
Chinmay Biswas Piyali Dey Subrata Satpathy 《Archives Of Phytopathology And Plant Protection》2013,46(14):1746-1751
Infection of stolbur phytoplasma was detected in kenaf (Hibiscus cannabinus) plants at CRIJAF research farm, Barrackpore, India. The infected plants formed profuse short branches at the top with bushy and bunchy top appearance. PCR with universal 16S rDNA phytoplasma primers P1/P7 yielded amplicons of 1.5 kb from all symptomatic leaf samples. Nested PCR with 16S-rDNA-specific nested primer pair R16F2n/R2 generated an amplicon of 1241 bp confirming the presence of a phytoplasma. The nested PCR products were sequenced and BALSTn analysis revealed 100% identity with 16S rRNA gene of phytoplasma. Phylogenetic analysis showed kenaf phytoplasma having 99% identity with both “Bois noir” stolbur phytoplasma 16SrXII group (Accession no: JQ181540). The RFLP data also supported the phylogenetic analysis. Multi-locus sequence characterisation assay was conducted by using different locus-specific primers viz. tuf, rpsC-rplV, rplF-rplR, map-SecY and uvrB-degV. The infected phytoplasma samples amplified only SecY gene and generated 1224 bp product which was deposited at NCBI (accession no: KC508636). 相似文献
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A multiplex nested PCR assay was developed by optimizing reaction components and reaction cycling parameters for simultaneous detection of Corchorus golden mosaic virus (CoGMV) and a phytoplasma (Group 16Sr V‐C) causing little leaf and bunchy top in white jute (Corchorus capsularis). Three sets of specific primers viz. a CoGMV specific (DNA‐A region) primer, a 16S rDNA universal primer pair P1/P7 and nested primer pair R16F2n/R2 for phytoplasmas were used. The concentrations of the PCR components such as primers, MgCl2, Taq DNA polymerase, dNTPs and PCR conditions including annealing temperature and amplification cycles were examined and optimized. Expected fragments of 1 kb (CoGMV), 674 bp (phytoplasma) and 370 bp (nested R16F2n/R2) were successfully amplified by this multiplex nested PCR system ensuring simultaneous, sensitive and specific detection of the phytoplasma and the virus. The multiplex nested PCR provides a sensitive, rapid and low‐cost method for simultaneous detection of jute little leaf phytoplasma and CoGMV. Based on BLASTn analyses, the phytoplasma was found to belong to the Group 16Sr V‐C.
Significance and Impact of the Study
Incidence of phytoplasma diseases is increasing worldwide and particularly in the tropical and subtropical world. Co‐infection of phytoplasma and virus(s) is also common. Therefore, use of single primer PCR in detecting these pathogens would require more time and effort, whereas multiplex PCR involving several pairs of primers saves time and reduces cost. In this study, we have developed a multiplex nested PCR assay that provides more sensitive and specific detection of Corchorus golden mosaic virus (CoGMV) and a phytoplasma in white jute simultaneously. It is the first report of simultaneous detection of CoGMV and a phytoplasma in Corchorus capsularis by multiplex nested PCR. 相似文献23.
Bacterial samples isolated from the upper respiratory tract of a healthy broiler chicken and a wild chicken suffering from influenza which were collected locally revealed proteolytic activity as detected by sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE) and zymogram analysis. Among five protease producing strains screened, one was selected as promising protease producer. The activity of the protease produced by this organism is stable up to 620C. Optimum yield was achieved after 19 hours of culture, at pH 9.0 and 450C. The desired protein was precipitated from the crude extract by using ammonium sulfate (60%) followed by dialysis and purified by Ion-exchange chromatography. Further investigations are needed to know about the structure elucidation of the purified protein for industrial exploitation. 相似文献
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This communication discusses a novel approach for the measurement of temperature in the mixing area of outflow water from Madras Atomic Power Station, located at a coastal site near Tamil Nadu, India. In addition, various environmental aspects such as chlorination, phytoplankton estimation and annual sea surface water temperature have also been addressed in this paper in the light of similar work published earlier from the same locality. 相似文献
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Takeo Narita Shinsuke Ito Yoshiki Higashijima Wai Kit Chu Katrin Neumann Jonas Walter Shankha Satpathy Tim Liebner William B. Hamilton Elina Maskey Gabriela Prus Marika Shibata Vytautas Iesmantavicius Joshua M. Brickman Konstantinos Anastassiadis Haruhiko Koseki Chunaram Choudhary 《Molecular cell》2021,81(10):2166-2182.e6
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Kheirolomoom A Satpathy GR Török Z Banerjee M Bali R Novaes RC Little E Manning DM Dwyre DM Tablin F Crowe JH Tsvetkova NM 《Cryobiology》2005,51(3):290-305
In a previous report [Z. T?r?k, G. Satpathy, M. Banerjee, R. Bali, E. Little, R. Novaes, H. Van Ly, D. Dwyre, A. Kheirolomoom, F. Tablin, J.H. Crowe, N.M. Tsvetkova, Preservation of trehalose loaded red blood cells by lyophilization, Cell Preservation Technol. 3 (2005) 96-111.], we presented a method for preserving human red blood cells (RBCs) by loading them with trehalose and then freeze-drying. We have now improved that method, based on the discovery that addition of phospholipid vesicles to the lyophilization buffer substantially reduces hemolysis of freeze-dried RBCs after rehydration. The surviving cells synthesize 2,3-DPG, have low levels of methemoglobin, and have preserved morphology. Among the lipid species we studied, unsaturated PCs were found to be most effective in suppressing hemoglobin leakage. RBC-vesicle interactions depend on vesicle size and structure; unilamellar liposomes with average diameter of less than 300 nm were more effective in reducing the hemolysis than multilamellar vesicles. Trehalose loaded RBCs demonstrated high survival and low levels of methemoglobin during 10 weeks of storage at 4 degrees C in the dry state when lyophilized in the presence of liposomes. 相似文献
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Chinmay Biswas Piyali Dey Subrata Satpathy 《Archives Of Phytopathology And Plant Protection》2013,46(13):1600-1602
Xanthomonas campestris pv. capsularii causing blight on jute (Corchorus capsularis) leaves was reported for the first time in India. The symptom of the disease initially observed was appearance of small angular brown leaf spots and later as blighted areas on leaf lamina. The disease-causing pathogen was isolated and identified on the basis of its colony morphology, PCR, sequencing and subsequent BLASTn analysis. 相似文献
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Binnaz Yalcin Jér?me Nicod Amarjit Bhomra Stuart Davidson James Cleak Laurent Farinelli Magne ?ster?s Adam Whitley Wei Yuan Xiangchao Gan Martin Goodson Paul Klenerman Ansu Satpathy Diane Mathis Christophe Benoist David J. Adams Richard Mott Jonathan Flint 《PLoS genetics》2010,6(9)
Genome-wide association studies using commercially available outbred mice can detect genes involved in phenotypes of biomedical interest. Useful populations need high-frequency alleles to ensure high power to detect quantitative trait loci (QTLs), low linkage disequilibrium between markers to obtain accurate mapping resolution, and an absence of population structure to prevent false positive associations. We surveyed 66 colonies for inbreeding, genetic diversity, and linkage disequilibrium, and we demonstrate that some have haplotype blocks of less than 100 Kb, enabling gene-level mapping resolution. The same alleles contribute to variation in different colonies, so that when mapping progress stalls in one, another can be used in its stead. Colonies are genetically diverse: 45% of the total genetic variation is attributable to differences between colonies. However, quantitative differences in allele frequencies, rather than the existence of private alleles, are responsible for these population differences. The colonies derive from a limited pool of ancestral haplotypes resembling those found in inbred strains: over 95% of sequence variants segregating in outbred populations are found in inbred strains. Consequently it is possible to impute the sequence of any mouse from a dense SNP map combined with inbred strain sequence data, which opens up the possibility of cataloguing and testing all variants for association, a situation that has so far eluded studies in completely outbred populations. We demonstrate the colonies'' potential by identifying a deletion in the promoter of H2-Ea as the molecular change that strongly contributes to setting the ratio of CD4+ and CD8+ lymphocytes. 相似文献