Post-Doctoral Research Associate
|Degrees:||B.Sc. (Utkal University, India), Ph.D. (University of Hyderabad, India)|
|Phone:||613-520-2600 x 4283|
Biosynthesis of protective plant surface polymers:
Plant biology is one of the frontier research areas for numerous reasons: plants play vital role in fuel and food security, and have tremendous effect on global climate and so on. One of the hypothesis based basic research is to explore and explain the mechanisms by which plants adapt to their changing environment, and that will facilitate crop improvement. Plants have chemically complex barriers on their surfaces, protecting them from insects and microbial pathogens as well as functioning in the control of water and solute uptake. Cutin and suberin are lipidic-phenolic polymers found adjacent to or within the plant cell walls that are at these plant-environment interfaces. Cutin is found on aerial surfaces and consists of an esterified polymer of C16 and C18 chain-length fatty acids and derivatives. Suberin is chemically related to cutin, but is specifically deposited in root interface cells, the peridermis of shoots (i.e. bark), and is induced by environmental assaults such as wounding. In spite of the important eco-physiological protective roles of suberin, the regulation of its biosynthesis is not well understood. In the research laboratory of Dr. Owen Rowland, I am currently using genomics, molecular genetics, gene expression profiling, and analytical chemistry techniques to understand the regulated deposition of suberin in the model plant Arabidopsis thaliana. Knowledge and tools obtained from my research will provide for novel approaches to develop stress and pathogen resistant crops.
Khan M, Xu M, Murmu J, Tabb P, Liu Y, Storey K, McKim SM, Douglas CJ, Hepworth SR (2012) Antagonistic interaction of BLADE-ON-PETIOLE 1/2 with BREVIPEDICELLUS and PENNYWISE regulates Arabidopsis inflorescence architecture. Plant Physiology 158:946-960.
Murmu J, Bush MJ, DeLong C, Li S, Xu M, Khan M, Malcolmson C, Fobert PR, Zachgo S, Hepworth SR (2010) Arabidopsis basic leucine-zipper transcription factors TGA9 and TGA10 interact with floral glutaredoxins ROXY1 and ROXY2 and are redundantly required for anther development. Plant Physiology 154:1492-1504.
Xu M, Hu T, McKim S, Murmu J, Haughn G, Hepworth SR (2010) Arabidopsis Blade-on-petiole 1 and 2 promote floral meristem fate and determinacy in a novel pathway targeting APETALA1 and AGAMOUS-LIKE24. Plant Journal 63:974-989.
Boyle P, Su EL, Rochan A, Shearer HL, Murmu J, Chu JY, Fobert PR, Després C (2009) The BTB/POZ domain of the Arabidopsis disease resistance protein NPR1 interacts with the repression domain of TGA2 to negate its function. Plant Cell 21: 3700-3713.
Murmu J, Plaxton WC (2007) Phosphoenolpyruvate carboxylase protein kinase from developing castor oil seeds: Partial purification, characterization, and reversible control by photosynthate supply. Planta 226: 1299-1310.