Browsing by Author "Kaushik Kumar Das"

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Insect-plant-pathogens: toxicity, dependence, and defense dynamics
(Elsevier, 2024) S.K.M.D. Ajaharuddin; Kaushik Kumar Das; Payel Kar; Pritha Bandyopadhyay; Maksud Hasan Shah; Subrata Goswami
In nature, the insect-plant-pathogen interaction has diverse implications on each other. The insect and plant pathogens devour plant tissues and suck sap as their feed, which stir up damage to the plant. Plants have developed a variety of defense mechanisms in response to damage inflicted by herbivores and pathogens in order to protect themselves as well as minimize the degree of damage. Plants constantly look forward to novel ways to escape insect and pathogen attacks, whereas insects and pathogens also develop counter-adaptations. Such triumvirate interconnections pave the way for the formation of novel biotypes, metabolic modifications, toxicity, and resistance among all participants in the interaction. As a result, the evolution of a variety of plant defensive properties as well as counter-adaptive features in insects and pathogens. In this dynamic defense system, biochemical interactions are considered more significant than morphological ones. Various changes in plants, such as changes in gene expression, detoxification, glucosinolate metabolism, cell wall alterations, signal transduction & Ca2+ dependent signaling, etc., are used to resist various types of pathogens and insects. Plant defense, on the other hand, puts insects and pathogens under selection pressure. Plant-vector-pathogen coevolution, host-defense tactics, toxicity, selectivity of host plant responses, and plant-vector-pathogen relationships in this dynamic nature are covered in this chapter, which is a key component of developing integrated pest and disease management strategies. © 2024 Elsevier Inc. All rights reserved.
Microbial-derived metal nanoparticles: Applications and perspective
(Elsevier, 2024) Soumya Shephalika Dash; Sagnika Das; Gouranga Saw; Partha Sarathi Tripathy; Kaushik Kumar Das; Subrata Goswami
Microbial-derived metal nanoparticles (MtNPs) have garnered significant attention as a novel class of nanomaterials with diverse applications across various domains. These nanoparticles, synthesized through the reduction of metal ions by a plethora of microorganisms including bacteria, fungi, algae, and viruses, have sparked significant interest due to their unique physicochemical properties and versatile applications. The unique synthesis mechanisms employed by microorganisms enable precise control over the size, shape, and composition of the resulting nanoparticles, offering advantages over conventional chemical synthesis methods. MtNPs exhibit exceptional catalytic, optical, and antimicrobial properties, making them promising candidates for applications in catalysis, sensing, imaging, and drug delivery. They also exhibit remarkable efficacy in environmental remediation, offering sustainable solutions for pollution control, wastewater treatment, and soil restoration. In agriculture, MtNPs offer avenues for enhancing crop yield, nutrient uptake, and pest management, thereby contributing to food security and sustainable agriculture practices. Additionally, their biocompatibility and low toxicity make them suitable for biomedical applications, including cancer therapy, wound healing, and diagnostic imaging. Furthermore, the sustainable and eco-friendly synthesis routes employed in their production align with the growing emphasis on green nanotechnology. Nevertheless, the burgeoning field of MtNPs holds great promise for addressing pressing societal and environmental challenges while fostering innovation in nanotechnology, but challenges such as scalability, reproducibility, and standardization remain, necessitating further research and development efforts. © 2025 Elsevier Inc. All rights are reserved, including those for text and data mining, AI training, and similar technologies.