https://ir.vidyasagar.ac.in/jspui/handle/123456789/392 Tue, 17 Feb 2026 07:16:09 GMT 2026-02-17T07:16:09Z https://ir.vidyasagar.ac.in/jspui/handle/123456789/6334 Title: Prospecting intraspecific diversity, utilities and biotic threats of some weed species in selected forest areas of Paschim Medinipur district for their proper exploitation. Authors: Chowdhury, Abhiram Abstract: Forest floor is often found to host plenty of herbs and shrubs growing spontaneously and most of that are known as weeds. In previous time weeds were considered as harmful unwanted plant. But in recent times this concept has changed. Many of the weeds have medicinal properties; in addition, some other economical uses as sources of fiber, oil, fuel wood etc. are also available. Present study delves into the variability of weed species at the intraspecific i. e. infraspecific level taking into consideration the individuals of the same species from different localities. Four plant samples selected for the study are Lantana camara Linn, Crotalaria pallida Ait, Ocimum canum Sims and Tephrosia purpurea Linn. Phenological aspects considering various events i.e. time of sprouting, flowering, fruit setting, fruit maturity and fruit dehiscence are investigated. Diversity within the species has been searched for phenology, morphological and biochemical traits. Morphological studies are comprised of the traits related to stem, leaf etc. and biochemical studies estimation of DNA, RNA and Protein. Benefits out of all these herbs are very much influenced by different biotic and abiotic factors. The loss is quite exorbitant when such threats are anthropogenic or cattle or insects etc. So, this study has also enumerated some major threats of this kind and a suggestion for proper management of these selected species has been attempted to. Tue, 09 Nov 2021 00:00:00 GMT https://ir.vidyasagar.ac.in/jspui/handle/123456789/6334 2021-11-09T00:00:00Z https://ir.vidyasagar.ac.in/jspui/handle/123456789/6275 Title: Investigation on the diversity of two species of Crinum L. with reference to their morphology, anatomy, cytology and active principle Authors: Dolai, Anushree Abstract: The genus Crinum L. of the family Amaryllidaceae is comprised of 85 genera. Among them Crinum is a large genus, with 1300 species, distributed throughout the world. Among them C. asiaticum L. and C. latifolium L. are two prominent species widely available at different parts of India, both naturally and as garden plants. In the present study, these two species have been chosen to work out their external and internal morphology, karyomorphology and the amount of lycorine. Study, here, has revealed both interspecific as well as intraspecific variations among them. The nature of the bulb appearance has shown the extreme variation amongst the different provenances. Detail anatomical study also revealed that different number of xylem strand, nature of the cortex and vascular bundle, presence of raphides are also varied among the different locations of both of the species. It is also noted that all the provenances have shown same diploid chromosome number 2n=22, but different chromosome morphological features have been shown the variation into the each individual of both the species. To find out the better productive sources related to active principle – lycorine presence in both of the species. It is observed that among the collection of C. asiaticum from different locations the plant from Nadia has been shown the highest percentage of lycorine. Whether among the ten different locations of C.latifolium, plants of Kolkata have contained highest percentage of lycorine. The biomass study has been revealed that in C. asiaticum Nadia is the better among the eight locations, weather in C. latifolium it has been noted that Paschim Medinipur is the better productive plant. The present studies have been revealed that morphological and karyomorphological diversity of C. asiaticum as well as C. latifolium in their intra and inter specific level. It is also found that the better productive plant in both of the species and their relation to the others morpho-anatomical as well as cytological parameters. Mon, 06 Sep 2021 00:00:00 GMT https://ir.vidyasagar.ac.in/jspui/handle/123456789/6275 2021-09-06T00:00:00Z https://ir.vidyasagar.ac.in/jspui/handle/123456789/6260 Title: An investigation on Allelopathic potential of three selected weeds growing in West Bengal Authors: Haque, Mahmudul Abstract: In our state of West Bengal Desmostachya bipinnata L. Stapf (Poaceae), Parthenium hysterophorus L. Asteraceae, Alternanthera sessilis (L.) R. Br. ex DC. (Amaranthaceae), are three profusely growing weeds with potential allelochemicals. An investigation therefore was carried out for the determination and evaluation of their allelopathic potential in terms of their relative allelopathic vigour from a physiological, biochemical (metabolic changes), software prediction and cytological approach. Allelochemicals in various concentrations [1:5, 1:10 and 1:20 (w/v)] of leaf extracts and leachates of the three weeds respectively are tested on Vigna radiata and Senna occidentalis seed germination, TTC stainability and several metabolic parameters like- changes in insoluble and soluble carbohydrates, amino acids, protein, DNA, RNA and enzymes like dehydrogenase ,catalase, peroxidase and amylase. Computational tools evaluate numerous compounds for innumerable toxicological end-points. Screening method, using ChemID plus is easy, highlighting compounds for which experimental evaluation is recommendable. It produces a system for predicting the allelochemical toxicity and/or mutagenicity. This system can also give additional information, by identifying genotoxic properties in a fast and convenient way on the basis of the analogus chemical structure prediction. Cytological evaluation of allelopathic potential is done by microscopic study of allelochemical induced alterations of cytological characters of root tip cells of Vigna radiata and Senna occidentalis with particular reference to various anomalies during celldivision and chromosomal structural abnormalities i.e. Chromosomal Abnormality Index reveal that Desmostachya bipinnata> Parthenium hysterophorus > Alternanthera sessilis in terms of allelopathic potential indicating that the monocotyledonous weed Desmostachya is more allelopathically vigorous than the other two dicotyledonous weeds. Parthenium and Alternanthera. Further research might thus be relevant to know the interaction of other invasive dicotyledonous and monocotyledonous weeds on other weed and crop species opening a new plethora of research. Fri, 27 Aug 2021 00:00:00 GMT https://ir.vidyasagar.ac.in/jspui/handle/123456789/6260 2021-08-27T00:00:00Z https://ir.vidyasagar.ac.in/jspui/handle/123456789/6043 Title: Ecofloristic survey of aquatic and marshy land angiosperms of Paschim Medinipur district, West Bengal, India Authors: Bhunia, Debasis Abstract: Plants of lakes, ponds, streams, swamps, and marshy places are called Hydrophytes. The present project aims to assume a thorough survey of the aquatic flora of this district. Out of total 160 angiosperms, 92 plant species are monocot and 68 plant species are dicot. Poaceae long with 28 species within 18 genera and Cyperaceae contain 23 species within 9 genera are most dominant monocot families. Among these 28 dicot families, Asteraceae contains a maximum of 4 genera and 5 species, followed by Lythraceae and Plantaginaceae with 3 genera 5 species, Lentibulariaceae with 1 genus and 5 species. The ratio between Monocotyledons and Dicotyledons families is 1: 1.87, genera is 1.38:1 species is 1.35:1. The highest density was measured among monocot in Spirodela polyrrhiza (16.634) and lowest in Alpinia aquatica (0.216); the highest monocot frequency (%) in Leersia hexandra (78.34%) and lowest in Blyxa echinosperma (5%); highest abundance value in Wolffia globosa (93.34) and lowest in Hygroryza aristata (3). In dicot highest density was measured in Grangea maderaspatana (7.5) and lowest in Bergia capensis (0.1); the highest frequency in Nymphaea pubescens and Grangea maderaspatana (60%), lowest in Ammannia auriculata, Bergia capensis, Ipomoea fistulosa, Oldenlandia brachypoda, Ranunculus sceleratus, Sphaeranthus africanus, Trapa natans, Utricularia gibba (5%); highest abundance value in Lindernia antipoda (19.34) and lowest in Ludwigia prostrata (1.5). After the PC analysis of the distribution of Monocotyledons Species with a similar distributional pattern are come into the same coordinate. Phragmites karka, Typha elephantine, Sagittaria sagittifolia, Potamogeton crispus, Blyxa echinosperma, and some other aquatic monocot are present in the same coordinate due to their similar distribution pattern in this district. In dicot Ammannia auriculata, Ipomoea fistulosa, Utricularia bifida, Hygrophila polysperma, Ceratophyllum demersum, and some other aquatic dicot are present in the same coordinate due to their similar distribution pattern. A total of 63 aquatic and marshy plant species, belonging to 49 genera are recorded among those 21 edible plants, 32 medicinal plants, 24 fodder plant and 12 plants those are used for home remedies for local inhabitants. This project will be helpful for further study on aquatic and marshy angiosperms, and also will be beneficial in the accounting nature of several aquatic weeds and their present status, to identify the plant, plant position, their density, frequency, and abundance in this district. GPS Positioning of those plants can study further shortly in that area by using this project. Tue, 20 Apr 2021 00:00:00 GMT https://ir.vidyasagar.ac.in/jspui/handle/123456789/6043 2021-04-20T00:00:00Z