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Modak Annayasa,Singh Brij Raj,Dubey Ashutosh,Tewari A. K.,Taj Gohar 한국작물학회 2022 Journal of crop science and biotechnology Vol.25 No.1
White rust, a devastating disease of Brassicaceae family, causes nearly 60% reduction in yield of Brassica juncea (Indian mustard). This dreadful disease is caused by oomycetes fungi Albugo candida. A comparative expression analysis of MAPKs cascade and some of defense-related genes in nontransgenic and transgenic (harbouring overexpressed MAPK3) cultivar of Brassica juncea were done to reveal the defense signalling pathway against biotrophic fungi Albugo candida. Disease indexing was also done to compare the disease severity in both transgenic and nontransgenic Brassica juncea cultivars. Lower disease index in transgenic Brassica suggests its tolerance to Albugo candida. Higher expression level of MAPK6 in comparison to MAPK3 in the transgenic Brassica indicates that MAPK6 mimics a portion of MAPK3 signalling pathway and work in a direct cascade for production of defense-related proteins. Overexpression of MAPK3 gene was observed in downregulating the expression of MAPK4 in transgenic Brassica juncea. The expression of two important transcription factors, such as WRKY33 and WRKY29 were also analyzed in the present study and were found to be higher in transgenic plant overexpressing MAPK3. The expression of three defense-related genes (OASTL-B, ACD2 and CSD2) was found to be increased in transgenic plants harbouring overexpressed MAPK3 gene; however, expression level of CYP20-3 was found higher in nontransgenic Brassica plant in response to pathogen infection. These four defense-related genes were also subjected to in silico studies, such as secondary structure, tertiary structure and putative phosphorylation sites prediction in addition to protein–protein interaction determination with potential MAPKs cascade and WRKY29, WRKY33.
Prasad, T.L.,Saxena, A.K.,Tewari, P.K.,Sathiyamoorthy, D. Korean Nuclear Society 2009 Nuclear Engineering and Technology Vol.41 No.8
The ocean contains around eighty elements of the periodic table and uranium is also one among them, with a uniform concentration of 3.3 ppb and a relative abundance factor of 23. With a large coastline, India has a large stake in exploiting the 4 billion tonnes of uranium locked in seawater. The development of radiation grafting techniques, which are useful in incorporating the required functional groups, has led to more efficient adsorbent preparations in various geometrical configurations. Separation based on a polymeric adsorbent is becoming an increasingly popular technique for the extraction of trace heavy metals from seawater. Radiation grafting has provided definite advantages over chemical grafting. Studies related to thermally bonded non woven porous polypropylene fiber sheet substrate characterization and parameters to incorporate specific groups such as acrylonitrile (AN) into polymer back bones have been investigated. The grafted polyacrylonitrile chains were chemically modified to convert acrylonitrile group into an amidoxime group, a chelating group responsible for heavy metal uptake from seawater/brine. The present work has been undertaken to concentrate heavy metal ions from lean solutions from constant potential sources only. A scheme was designed and developed for investigation of the recovery of heavy metal ions such as uranium and vanadium from seawater.
Kumar, Vineet,Tewari, S. K.,Awasthi, A. K.,Datta, R. K. 한국잠사학회 1999 한국잠사곤충학회지 Vol.41 No.2
Under Light and Scanning electron microscope, the pupal morphology of mulberry silkworm Bombyx mori Linn. revealed the reduced prothorax and metathorax, well developed mesothorax, less defined last pair of spiracle, well exposed prothoracic femora and wing pads approaching the anterior margin of Ab III. The important sex separating characters viz. pupal size, weigt, antennal elevations, intersegmental lines and genital openings have been discussed. Further, two separate openings bursa copultrix and ovipositional opening were observed, performing different functions in adult moth.