Institutional Publications

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Author: search.filters.author.Chakraborty, NiranjanSubject: search.filters.subject.Food security

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    Grasspea, a critical recruit among neglected and underutilized legumes, for tapping genomic resources
    (Elsevier B.V., 2021) Rathi, Divya; Chakraborty, Subhra; Chakraborty, Niranjan
    Environmental perturbations are persistent threats to sustainable agriculture, and thus recruitment of resilient crops, especially legumes, exhibiting agronomically important traits has become a priority for plant biologists. It is of utmost importance that the neglected and underutilized legumes (NULs) are identified and utilized as source of germane genes and gene-products, through concerted research platforms. In the present article, we analyzed the current status of NULs with specific emphasis to the potent utility of grasspea owing to its unique characters including stress adaptation, nutritional superiority and ease of cultivation. We have highlighted the landmarks in the history of grasspea, delineating the rapid progress achieved in grasspea biology during the past decades. Despite possession of a neurotoxic compound, β-N-oxalyl-L-α,β-diaminopropionic acid (β-ODAP), this neglected legume outshines most food crops with its distinct physicochemical attributes, health and agricultural benefits and resilience to environmental constraints. With the availability of genome sequence, grasspea is now established as an appropriate genetic resource for sustainable agriculture and phytoremediation rendering its genes, proteins and metabolites for targeted genetic manipulation. We conclude that grasspea would serve as a resource for plant translational genomics (TG) research, particularly resilience of legumes to environmental challenges.
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    Cultivar-specific high temperature stress responses in bread wheat (Triticum aestivum L.) associated with physicochemical traits and defense pathways
    (Elsevier B.V., 2017) Mishra, Divya; Shekhar, Shubhendu; Agrawal, Lalit; Chakraborty, Subhra; Chakraborty, Niranjan
    The increasing global temperature by 1°C is estimated to reduce the harvest index in a crop by 6%, and this would certainly have negative impact on overall plant metabolism. Wheat is one of the most important crops with global annual production of over 600million tonnes. We investigated an array of physicochemical and molecular indexes to unravel differential response of nine commercial wheat cultivars to high temperature stress (HTS). The reduced rate in relative water content, higher membrane stability, slow chlorophyll degradation and increased accumulation of proline and secondary metabolites ingrained higher thermotolerance in cv. Unnat Halna, among others. The altered expression of several stress-responsive genes, particularly the genes associated with photosynthesis, heat shock proteins and antioxidants impinge on the complexity of HTS-induced responses over different genetic backgrounds and connectivity of adaptive mechanisms. This may facilitate the targeted manipulation of metabolic routes in crops for agricultural and industrial exploitation.
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    Comparison of proteomic and metabolomic profiles of two contrasting ecotypes of sweetpotato (Ipomoea batata L)
    (Elsevier B.V., 2016) Shekhar, Shubhendu; Mishra, Divya; Gayali, Saurabh; Buragohain, Alak Kumar; Chakraborty, Subhra; Chakraborty, Niranjan
    Sweetpotato has long been acknowledged as a significant contributor of global caloric needs, which continues to be of remarkable economic value. It is an important staple and emergency food in many countries and its annual world production hovers to about 130 million tons. The tubers act as sink and compete for the available photoassimilates eventually leading to the acquisition of nutrients and phytochemicals. Differential display of genes or gene-products, and metabolites causes differences in nutritive value of closely related ecotypes. To better understand the molecular basis for differential nutrient availability and phytochemicals, and exploit the natural genetic variation(s), we aimed at developing proteometabolic profiles of two contrasting ecotypes of sweetpotato. Proteomic analyses led to the identification of 1541 and 1201 proteins in orange fleshed and white fleshed sweetpotato ecotypes, respectively, presumably associated with binding, followed by catalytic, transferase, hydrolase, kinase and transporter activities. Furthermore, metabolome profiling revealed 148 and 126 metabolites in cv. OFSP and WFSP, respectively. This study would provide a basis for future comparative proteometabolomic efforts for sweetpotato, in particular and tuber crops in general. The results would expand our understanding of the proteome as well as metabolome and give new insights into how ecotype-specific traits are developed.
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    Plant proteomics in India and Nepal: current status and challenges ahead
    (Springer, 2013) Deswal, Renu; Gupta, Ravi; Dogra, Vivek; Singh, Raksha; Abat, Jasmeet Kaur; Sarkar, Abhijit; Mishra, Yogesh; Rai, Vandana; Sreenivasulu, Yelam; Amalraj, Ramesh Sundar; Raorane, Manish; Chaudhary, Ram Prasad; Kohli, Ajay; Giri, Ashok Prabhakar; Chakraborty, Niranjan; Zargar, Sajad Majeed; Agrawal, Vishwanath Prasad; Agrawal, Ganesh Kumar; Job, Dominique; Renaut, Jenny; Rakwal, Randeep
    Plant proteomics has made tremendous contributions in understanding the complex processes of plant biology. Here, its current status in India and Nepal is discussed. Gel-based proteomics is predominantly utilized on crops and non-crops to analyze majorly abiotic (49 %) and biotic (18 %) stress, development (11 %) and post-translational modifications (7 %). Rice is the most explored system (36 %) with major focus on abiotic mainly dehydration (36 %) stress. In spite of expensive proteomics setup and scarcity of trained workforce, output in form of publications is encouraging. To boost plant proteomics in India and Nepal, researchers have discussed ground level issues among themselves and with the International Plant Proteomics Organization (INPPO) to act in priority on concerns like food security. Active collaboration may help in translating this knowledge to fruitful applications.