NBU Journal of Plant Sciences
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The NBU Journal of Plant Sciences serves as the official organ of the Department of Botany for the publication of research papers by its members and researchers. The journal is sent free to its members and different academic institutions on demand.
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Item Open Access Antifungal Efficacy of Cu-Based Nano-Chitosan on Rhizopus stolonifer, A Virulent Phytopathogen(University of North Bengal, 2022) Chouhan, Divya; Choudhuri, Chandrani; Dutta, Poulami; Mandal, Palash; Mathur, PiyushAgro-scientists are giving endless efforts for synthesizing a bio-derived molecule that can act as a promising antifungal agent for combating a large number of phytopathogens. Harmful phytopathogens decrease crop yield and its quality. Rhizopus stolonifer is one such virulent phytopathogen that causes huge losses during the post-harvest period of crops. This pathogen mainly causes rot disease in fruits, crops, and vegetables. The second most abundantly available biological macromolecule, Chitosan and its metal-based nanoparticles stands as a potential antifungal agent for combating Rhizopus stolonifer. This study includes the synthesis of Cu chitosan nanoparticles (Cu-CNPs) and chitosan nanoparticles (CNPs) through the ionic gelation method and its characterization based on UV Vis spectrophotometer, FE-SEM, EDXS, and DLS. Cu-CNPs and CNPs were screened from 100-2000 µg/mL concentration against R. stolonifer for the assessment of its antifungal activity. Spore viability assay and lipid peroxidation of the pathogen using Cu-CNPs and CNPs were also determined. Generation of oxidative stress in the mycelium of the pathogen on the application of Cu-CNPs and CNPs was traced by fluorescence microscopy. Changes in the ultra-structure of the sporangium of R. stolonifer after treatment with Cu-CNPs and CNPs were visualized under SEM. Results showed that Cu-CNPs inhibit the growth of R. stolonifer at 2000 µg/mL and elevate malonaldehyde (MDA) content in the pathogen as a result of lipid peroxidation and produces defined damages on the sporangium membrane as observed under electron microscope. Fluorescence microscopy revealed the emission of high intensity of fluorescence due to the generation of oxidative stress in Cu-CNPs treated fungal mycelium.Item Open Access Assessment of Growth Performance and Histochemical Localisation of Reactive Oxygen Species in Fenugreek under Exogenous Calcium Ion Priming(University of North Bengal, 2022) Gupta, Saran Kumar; Mandal, Palashobjective of present study was to evaluate the response of the fenugreek seeds primed with various elicitors such as calcium chloride (CC) as an exogenous source of calcium ion; a calcium chelator: Ethylene glycol-bis(2-aminoethylether)-N,N,N´,N, tetra acetic acid (EG); and Lanthanum chloride (LC): a calcium channel blocker, under salinity stress. Significant improvement in the growth parameters of fenugreek seedlings was observed comparing with control. The stress tolerance index (STI) and histochemical detection of reactive oxygen species were performed to evaluate the tolerance of the fenugreek against salinity stress. The results exhibited noteworthy inhibitory effect of salinity stress in control set which was significantly mitigated by the exogenous calcium ion application. Furthermore, under the influence of calcium ion antagonists, EG and LC the adverse effect of salinity was more prominent than control set. In conclusion present investigation revealed that exogenous calcium ion is an ideal elicitor for enhancing growth and development of the fenugreek with better salinity stress management.Item Open Access Study of Major Isoflavones in Mungbean Seedlings with Special Emphasis on Its Enhanced Antioxidant Activity After Solid Matrix Priming with Selected Elicitors Including Nano-Chitosan Under Salinity Stress(University of North Bengal, 2022) Sen, Sujoy Kumar; Mandal, Palash; Bhandari, Jnan BikashFor a long time, mung bean has been a well-liked crop. It is frequently used as a popular dish in the primarily cereal-based diets of Asian countries for its physiological functionalities, such as antioxidant, antitumor, and antidiabetic activities. Isoflavones present in legume-based foods have high antioxidant potential. These isoflavones are considered beneficial to human health and are linked to a reduced risk of cardiovascular disease, osteoporosis, and the prevention of certain types of cancer in humans, including breast, prostate, and colon cancer, as well as menopausal symptoms. On the other hand, nanotechnology is starting to look like an excellent method to boost food production and make farming less hazardous to the environment. Fascinatingly, the seed nano-priming method demonstrated promising results to mitigate the detrimental effects of different abiotic stress factors including salinity stress on crop plants and has thus, led to higher crop yields. The current study aimed to evaluate the effects of solid matrix priming (SMP) using nano-chitosan in mung bean sprouts under salinity stress related to the production of major mung bean isoflavones, which were detected through high-resolution liquid chromatography-mass spectrometry. When compared to unprimed seedlings exposed to salinity stress conditions, phytochemical quantification showed that SMP with nano-chitosan showed improved antioxidant activities as well as the highest total flavonoids and proline content. Under salinity stress, SMP with nano-chitosan significantly increased the biochemical anti-oxidative properties in germinated mung bean seeds, and also provided salt tolerance. As a familiar healthier choice, and because of the significance of mung bean sprouts for human health and the industry's rapid expansion, nutritional enrichment of this food has emerged as a significant field of study.Item Open Access Zinc Oxide Nanoparticles: Different synthesis approaches and applications(University of North Bengal, 2021-03) Kundu, Sudipta; Haydar, Md. Salman; Mandal, PalashNanotechnology deals with the synthesis and usage of materials with nanoscale dimension (1-100 nm). Nanoscale dimensions of the particles provide large surface to volume ratio and thus very specific properties. Synthesis of zinc oxide nanoparticles (ZnO NPs) has gained prime importance in recent arena due to its high excitation binding energy and large bandwidth and it has potential applications like anti-diabetic, antibacterial, anti-inflammatory, antifungal, wound healing, antioxidant and optical properties. Zinc (Zn) is a common mineral element in nature which plays an immense role in many biological processes. It is defined as an essential trace element or micronutrient which is very much crucial for the normal growth and the development of all higher plants as well as animals. Zinc directly involves in enzyme function associated with the photosynthesis and energy process in plants. It also plays an important role in maintenance of membrane integrity, formation and production of growth hormone, insulin, thyroid etc. Due to the involvement of large rate of toxic chemicals and requirement of extreme environment, chemical and physical methods of nanoparticle synthesis often became inappropriate. Whereas, green methods are used in a wide range of biological samples including plants, fungus, bacteria, and algae, which act as both reducing and capping agent. Biologically synthesized zinc nanoparticles have been reported for versatile applications in the field of medicine and pharmacy, for bio-imaging and bio-sensor production, in gene therapy and drug delivery system. Zinc nanoparticles also play vital role in agricultural sector including plant growth and development, enhancement of crop yield and post-harvest processing. In spite of being great potential of ZnO NPs for abiotic and biotic stress management, research works in this field is considerably less. This review described the summary of the recent works in the synthesis mechanism, characterization techniques, and applications of biosynthesized ZnO NPs in medicine and agriculture with special reference to application on plant growth, development and abiotic stress management.Item Open Access A comparative study of silkworm (Bombyx mori L.) rearing under different sources of peptides isolated from Dudhiya and S1 mulberry leaves(University of North Bengal, 2015-03) Jha, Suchisree; Bhattacharyya, Phalguni; Ghosh, Amitava; Mandal, PalashSilkworm is a domestic monophagous insect, produces only natural animal the fibre. Growth of silkworm larvae depends on nutritional components of mulberry leaves. In present study one attempt was made to investigate the role of low molecular weight (0.5-3 kDa) mulberry peptides on silkworm rearing. For peptide extraction, two different types of mulberry leaves were chosen, one from S1 which was preferred by larvae for feeding, another is a germplasm named Dudhia, refused by larvae. Peptides isolated from young S1 leaves showed higher larval growth followed by peptides isolated from mature and senescence leaves. High ERR% along with enhanced weight of single cocoon and single shell was observed in silkworm fed with S1 peptide treated mulberry leaves as compared with the same by Dudhia peptides. Elevated antioxidant activities were exhibited by S1 peptides than Dudhia at all maturity stages (young, mature and senescence). Significant correlation was obtained between antioxidant activities of S1 peptides and economical attributes of silkworm rearing such as ERR %, weight of single cocoon, weight of single shell etc. From our observation it might be stated that the farmers would have been benefited if they could use mulberry leaves treated with antioxidant enriched peptides as a food for silkworm rearing.Item Open Access Deterioration of Antioxidant and Antidiabetic Activity of Seven Taruls Through Boiling(University of North Bengal, 2014-03) Ghosal, Mitali; Kalwar, Premlata; Mandal, PalashThe underground edible rhizomes and tubers are commonly known as "Taruls' in Darjeeling Himalaya and are mostly available during winter season. These vegetables are consumed as raw or processed through boiling for making them more palatable by local people of Darjeeling Himalaya. The methanolic extracts of raw and boiled (ten minutes) taruls were screened for their in vitro antioxidant potential by DPPH and ABTS' free-radicals, reducing power, metal chelating. nitric oxide, superoxide, hydroxyl radical scavenging capacity and anti-lipid peroxidation assays along with measuring in vitro antidiabetic activity by a-glucosidase and a-amylase inhibition. Our present study demonstrated that in majority of experimental assays, the performance of Dioscorea alata (ghar tarul) was best followed by Ipomoea batatas (red and white cultivar of sakarkanda) and D. hamiltonii (ban tarul), which showed stronger free-radical scavenging activity, high degree of different polyphenol content as well as antidiabetic capacity except for the iron-induced metal chelation where Sechium edule (squash-jara) was excellent performer. Therefore it can be stated that the extracts of different taruls might help in preventing or slowing the progress of various oxidative stress induced diseases. Our study also showed that in every antioxidant assays the scavenging activity reduced with boiling. As boiling decreases bioactive potency, it can be suggested that some alternative strategies should be developed during post-processing through which valuable phytochemicals of taruls might be preserved.Item Open Access In vitro antioxidant activity of two edible Timbur fruits of Darjeeling Himalaya(University of North Bengal, 2010-03) Ghosal, Mitali; Mandal, PalashFrec radicals are implicated for many chronic, painful and near-fatal diseases including Diabetes mellitus, arthritis, cancer, apoptosis, neurodegenerative disorders etc. In treatment of these discases, antioxidant therapy has gained an utmost importance and current rescarch is now directed towards finding naturaly occurring antioxidants of plant origin. Edible Timburs namely Zanthoxylum acanthopodium DC. and Litsea cubeba (Loureiro) Persoon are traditionally usced as spices in different Nepali recipes. In the present study, the fruits of these plants were extracted with aqucous methanol (1:4) to examinc the in vitro antioxidant property, phenol content and phytochemical constituents. The scavenging activities on DPPH free radicals, superoxide anions and per-oxidized lipid molecules were determined as well as the flavonoid and phenolic constitucnts of the extracts. The extracts exhibited significant scavenging activity towards DPPH free radicals and high anti-lipid peroxidation values duc to the presence of relatively high total phenol contents. Also, these spices contain a vast array of different phytochemicals in their dry form. These results suggest that both Zanthoxylum acanthopodium and Litsea cubeba fruits are endowed with antioxidant phytochemicals and could serve as basal ingredients for nutraceutical formulations.Item Open Access Tea Polyphenols: variation with respect to agro-climatic condition, their impact in human health and soil environment(University of North Bengal, 2007-03) Misra, Tarun Kumar; Mandal, PalashTea is the richest source of different kinds of polyphenols and potential antioxidants. recent years numerous biochemical and physiological studies have demonstrated that accumulation of polyphenols in tea is significantly related to soil nutrient availability. In this review recent advances in current understanding of bioactive polyphenols and their accumulation in tea plant have been discussed concisely.