Publications of NIPGR Scientists

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Start date: 2024Subject: search.filters.subject.iTRAQ

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    Metabolism and signalling in pea (Pisum sativum) leaves exposed to drought and subsequent recovery
    (John Wiley & Sons, 2026) Pandey, Jayendra; Mantena, Chakradhar; Kumari, Aprajita; Singh, Pooja; Foyer, Christine H.; Gupta, Kapuganti Jagadis; Subramanyam, Rajagopal
    Uncovering the metabolic and molecular mechanisms involved in plant responses to drought and subsequent recovery, is essential to identify drought tolerance mechanisms that can be used to improve crop plants. Here we combine plant physiology and biochemistry, with gene expression, quantitative proteomics and metabolite profiling to identify the genetic and metabolic networks that operate in plants experiencing and recovering from drought. Network analysis of transcripts, proteins and metabolites revealed that certain biological processes such as the tricarboxylic acid cycle and lipid metabolism had a strong impact on the overall control of leaf responses to drought and recovery. The stimulation of carbohydrate oxidation pathways is demonstrated to be a key node in the generation of energy and precursors required to support diverse survival pathways of defence.
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    Proteo-metabolomic dissection of extracellular matrix reveals alterations in cell wall integrity and calcium signaling governs wall-associated susceptibility during stem rot disease in jute
    (American Chemical Society, 2024) Arafat, Md Yasir; Narula, Kanika; Kumar, Mohit; Chakraborty, Niranjan; Chakraborty, Subhra
    The plant surveillance system confers specificity to disease and immune states by activating distinct molecular pathways linked to cellular functionality. The extracellular matrix (ECM), a preformed passive barrier, is dynamically remodeled at sites of interaction with pathogenic microbes. Stem rot, caused by Macrophomina phaseolina, adversely affects fiber production in jute. However, how wall related susceptibility affects the ECM proteome and metabolome remains undetermined in bast fiber crops. Here, stem rot responsive quantitative temporal ECM proteome and metabolome were developed in jute upon M. phaseolina infection. Morpho-histological examination revealed that leaf shredding was accompanied by reactive oxygen species production in patho-stressed jute. Electron microscopy showed disease progression and ECM architecture remodeling due to necrosis in the later phase of fungal attack. Using isobaric tags for relative and absolute quantitative proteomics and liquid chromatography-tandem mass spectrometry, we identified 415 disease-responsive proteins involved in wall integrity, acidification, proteostasis, hydration, and redox homeostasis. The disease-related correlation network identified functional hubs centered on α-galactosidase, pectinesterase, and thaumatin. Gas chromatography–mass spectrometry analysis pointed toward enrichment of disease-responsive metabolites associated with the glutathione pathway, TCA cycle, and cutin, suberin, and wax metabolism. Data demonstrated that wall-degrading enzymes, structural carbohydrates, and calcium signaling govern rot responsive wall-susceptibility. Proteomics data were deposited in Pride (PXD046937; PXD046939).