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    Item type:Item, Article Access status: Open Access ,
    Morphological and anatomical characteristics of seedlings of selected indigenous and introduced palms in West Bengal, India
    (University of North Bengal, 2025) Mondal, Sujit; Saha, Papiya; Chowdhury, Monoranjan
    Investigations on seedling morphology in vascular plants have increasingly emerged as a reliable taxonomic tool for both monographic and systematic studies. In the family Arecaceae (Palmae), two principal types of germination are commonly recognized, namely remote germination and adjacent germination, which provide significant diagnostic value. The present study deals with the morphological and anatomical characteristics of germination patterns in selected indigenous and introduced palm species representing six subfamilies. Special emphasis has been given to key seedling structures such as hyperphyll, cataphyll, eophyll, and primary root, which exhibit considerable variation among taxa. Detailed anatomical observations of the eophyll, petiole, stem, and root were carried out to understand internal structural differences and their taxonomic relevance. The study reveals that both external morphology and internal anatomy of seedlings offer stable and distinguishable characters that can be effectively utilized for early identification of palm taxa, even before the reproductive stage. The findings contribute to filling the existing gap in palm seedling studies and highlight the importance of integrating seedling morphology with anatomical data in taxonomic and evolutionary investigations of Arecaceae.
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    Item type:Item, Article Access status: Open Access ,
    Antimicrobial activity of lichen Everniastrum sp, its synergism with Sapindus mukrossi and Panax pseudoginseng: LC-MS identification of active compounds
    (University of North Bengal, 2025) Kalikotay, Sujata; Sharma, Binod Chandra
    A fruticose lichen, Everniastrum, was screened for its antimicrobial activity against eight microorganisms in this study, and its synergistic antimicrobial activity was tested with two commonly known medicinal plants of the Darjeeling Hills. Identification of the active principle in the lichen extract and the probable active compounds was performed by LC-MS analysis. The list of names, classes, mass spectrum, and occurrence of lichen substances obtained from LC-MS Chromatogram of the methanolic extract of Everniastrum sp. revealed the presence of mainly orcinol, depsidones, and depside compounds with some aliphatic acids, xanthones, and usnic acid derivatives. The compounds present were namely hypostitic acid, salazinic acid, norstictic acid, alectoronic acid, thiomelin, conloxodin, usnic acid, and 2’-O-methylnobarbatic acid. The findings of this research indicate that the presence of distinct groups of phytochemicals in Everniastrum sp. may be explored for the development of widely acceptable agents to combat disorders without side effects.
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    Item type:Item, Article Access status: Open Access ,
    Evaluation of a plastic-degrading bacterium – Mesobacillus foraminis SMCD3 for its plant growth promoting activity in Cicer arietinum seedlings exposed to polystyrene
    (University of North Bengal, 2025) Basu, Anindita Ghosh; Roy, Moumita; Tamang, Karishma; Chowhan, Papon; Paul, Rita Som; Chakraborty, Arka Pratim; Roy, Swarnendu
    The accumulation of polystyrene (PS) in terrestrial ecosystems poses serious environmental and agricultural concerns, necessitating effective and sustainable bioremediation strategies. In this study, a bacterial isolate, MesoBacillus foraminis strain SMCD3, obtained from municipal dumping ground soil, demonstrated significant PS-degrading capability, achieving a 14% reduction in PS weight when cultured in mineral salt medium with PS as the sole carbon source, accompanied by high cell density, indicating efficient metabolic assimilation under nutrient-limited conditions. Enzymatic characterization revealed that PS degradation is primarily mediated through non-classical pathways involving extracellular hydrolases (lipase and esterase) and oxidative enzymes such as alkane hydroxylase and alcohol dehydrogenase. In addition to its biodegradation potential, MesoBacillus foraminis strain SMCD3 exhibited multiple plant growth-promoting (PGP) traits, including indole-3-acetic acid production, ammonia generation, and siderophore secretion, suggesting its potential to enhance nutrient availability and phytohormonal regulation. Exposure of Cicer arietinum to PS nanoparticles and microplastics significantly inhibited germination, growth, and physiological performance. However, inoculation with MesoBacillus foraminis strain SMCD3 effectively mitigated these phytotoxic effects by improving germination parameters, promoting shoot (1.25-2.68-fold) and root (1.00-2.12-fold) elongation, enhancing relative water content (1.01-1.26-fold), and reducing membrane damage (1.60-2.88-fold) compared to PS-MNP-treated seedlings. Moreover, MesoBacillus foraminis strain SMCD3 represents a versatile bacterium with dual functional attributes in PS biodegradation and plant growth promotion, underscoring its potential for integrated applications in bioremediation and sustainable agroecosystems under plastic-contaminated conditions.
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    Item type:Item, Article Access status: Open Access ,
    Modulation of morpho-physiological and biochemical attributes through seed priming towards improved seedling growth of Bergenia ciliata (Haw.) Sternb.
    (University of North Bengal, 2025) Chaudhuri, Kajal Mog; Bera, Kuntal; Mutum, Bigyananda; Mukherjee, Soham; Dutta, Puspendu; Debnath, Manoj Kanti
    Bergenia ciliata of the Saxifragaceae family is an important perennial herb that is predominantly propagated through rhizomes due to its poor seed germination potential. This study was carried out at the Department of Seed Science and Technology, UBKV, Pundibari, Cooch Behar, and a Completely Randomized Design (CRD) was followed and replicated thrice. Seed priming, a widely accepted technique, aims to enhance seed germination traits, ensure a good crop stand, and improve yield across diverse climatic conditions. Thus, the investigation aimed to assess the impact of different priming techniques on morpho-physiological and biochemical parameters of B. ciliata seedlings. Seeds were primed with 14 different conventional agents, depending on concentrations or duration of exposure. Upon emergence, seedlings were grown for 3 months, during which various seedling growth and physiological or biochemical parameters were analyzed. All priming treatments resulted in better seedling growth than the control. However, the GA3 at 50 ppm treatment recorded the highest root and total length, and fresh weight of 3-month-old seedlings. The highest leaf area and leaf numbers were found in GA3 at 100 ppm. The positive effect of different priming agents on seedling performance and morpho-physiological traits, as compared to the control treatment, would be attributed to the advancement of pre-germinative metabolisms and improved repair mechanisms involving greater activities of antioxidant systems. The PCA and cluster analysis also helped to understand that the efficacy of priming agents varied depending on their kinds and the dosages.
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    Item type:Item, Article Access status: Open Access ,
    Qualitative phytochemical screening and extraction yield of whole plant of ethno-medicinal fern Drynaria quercifolia (L.) J. Smith
    (University of North Bengal, 2025) Gupta, Subash Kumar; Chhetri, Prashan Kumar; Saha, Maitri; Bhandari, Jnan Bikash
    The present investigation has been carried out on the qualitative phytochemical screening and extraction yield of the whole plant of the ethno-medicinal fern Drynaria quercifolia (L.) J. Smith. The present work is the first study reporting information on these ethno-medicinal ferns with respect to the whole plant parts. Phytochemical screening of immature and mature fronds of D. quercifolia was performed, and the results indicate that alkaloids were absent in immature fronds for aqueous, ethanol, and hexane extracts, but present in methanol, ethyl acetate, and petroleum ether extracts, while absent in ethanol and hexane extracts. Alkaloids were completely absent in all extracts of both immature and mature sterile fronds. Carbohydrates, flavonoids, coumarins, phenols, proteins, amino acids, and saponins were consistently present in all solvent extracts of both immature and mature fronds, indicating their abundance and solvent-soluble nature. Flavonoids, coumarins, phenols, and proteins/amino acids were consistently present in all solvent extracts of both immature and mature rhizomes. The highest extraction yield was obtained with methanol Soxhlet extraction of Immature fronds (15.14 ± 0.05%), mature rhizome (15.40 ± 0.21%), and mature Sterile Fronds (11.53 ± 0.37%). These findings highlight that both solvent polarity and extraction method play crucial roles in optimizing phytochemical yield. Phytochemical screening and extract yield of medicinal plants are important in identifying new sources of valuable compounds having medicinal significance to make the best and thoughtful use of available natural wealth.