Papers by Dr. Chandrima Debi
International journal of herbal medicine, 2024
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International Journal of Herbal Medicine , 2024
Himalayan region is well recognized for a plethora of medicinal plants. Landour is located at an ... more Himalayan region is well recognized for a plethora of medicinal plants. Landour is located at an altitude of about 6,800 to 7,798 ft in the Lower Western Himalaya, in the Mussoorie Range. It encompasses a considerable forested area, of Banj Oak (Quercus leucotrichophora) with intermittent Deodars, Pines and Rhododendrons. The present paper reveals the floristic diversity and medicinally important plant species present in the hillside of Landour, Mussoorie. During the study 97 species of vascular plants (Angiosperms and Gymnosperms) belonging to 54 families were recorded from the study area. There were 24 tree species, 44 species of herbs, 24 species of shrubs, 5 species of climbers. The major families of Angiosperms in the region are Asteraceae (8 genera, 9 species), followed by Rosaceae (5 genera, 6 species), Lamiaceae (3 genera, 4 species) and 4 genera of Pinaceae, Acanthaceae, Polygonaceae, 3 genera of Cornaceae, Sapindaceae, Urticaceae. The majority percentage of the ground cover is comprised of herbs. A total of 74 plant species were identified in the region which have medicinal properties among which 20 plant species are trees, 16 plant species are shrubs, 36 plant species are herbs and 2 climbers. All plants with botanical names, common names, family, habit, and medicinal properties were listed and tabulated.
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International Journal of Environment, Agriculture and Biotechnology, 2022
Landour is located at an altitude of about 6,800 to 7,798 ft in the Lower Western Himalaya, in th... more Landour is located at an altitude of about 6,800 to 7,798 ft in the Lower Western Himalaya, in the Mussoorie Range. Along the hillside of Landour one of the oldest residential schools in Asia, Woodstock School is situated. It encompasses a considerable forested area, which is mostly monoculture of Banj Oak (Quercus leucotrichophora) with intermittent Deodars, Pines and Rhododendrons. The climatic condition, forest type and soil in the hillside are congenial for growth and development of different species of mushrooms. A variety of mushrooms belong to edible, poisonous and medicinal species can be seen during rainy season. In the present study, six different mushroom species were collected during rainy season (July to September, 2022). Amongst the six species, five species were mycorrhizal, four species were edible, three species were medicinal and two species were non edible, while one species was poisonous. This study unravelled the abundance of the mushrooms in the campus.
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Oroxylum indicum is a medicinally important forest tree species. This species is categorized as v... more Oroxylum indicum is a medicinally important forest tree species. This species is categorized as vulnerable as well as endangered in different parts of India due to over exploitation of whole plant for medicinal uses. Therefore, its conservation is must and on this aspect an experiment was performed to see the effect of bioinoculation on the plastochron interval and root surface area in the seedlings of O.indicum. The seedlings of O. indicum were inoculated with plant growth promoting microbes (PGPMs) both alone and consortium. The Plastochrone Interval of the seedlings of O. indicum was studied after first, second and third inoculation (i.e. 90, 180 and 270 DAI). While the root surface area was calculated after the completion of final stage of inoculation. After first stage of inoculation it was found that the first to second leaf primordium was initiated in control treatment after long interval of 43 days and it ceased after 83 days (2 leaf primordium). But in case of seedlings treated with mixed consortium of bacteria,fungus and mycorrhiza, the 1-2 leaf primordium appeared after 21 days and ceased after 102 days. Plastochron interval of O. indicum after second stage of inoculation showed that the leaf primordia appeared after 33 days in control treatment whereas in seedlings treated with bacteria and mycorrhiza it appeared after 20 days respectively. The leaf primordial appearance ceased to appear after 61 days in case of control treatment, but in seedlings treated with mixed consortium, the leaf primordial appearance continued to appear.Plastochrone interval index of O. indicum after third stage of inoculation showed that the 1-2 leaf primordium initiated after 49 days and ceased later in control treatment. The leaf primordia showed wilting and symptoms under stress and the initiation of leaf primordia completely ceased after third stage of inoculation. Whereas, the initiation of leaf primordia didn’t ceased in rest treatments. 1-2 leaf primordium initiated after 13 days in seedlings treated with mixed consortium of bacteria, fungus and mycorrhiza. 8-9 leaf primordium initiated after 17 days in seedlings treated with mixed consortium. The root surface area of the seedlings of O.indicum was calculated and it was found that the root surface area (cm) was maximum (140.88±5.18) in seedlings treated with mixed consortium of bacteria,fungus and mycorrhiza and it was minimum (47.509±1.66) in Control.
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Sal forest of Assam and Uttarakhand show that the soils have similar chemical and physical charac... more Sal forest of Assam and Uttarakhand show that the soils have similar chemical and physical characteristics except for Potassium concentration, which is slightly higher in the Assam soil as compared to the Uttarakhand soil. Differences in available nitrogen and phosphorus was statistically non significant between the soil samples of Assam and Uttarakhand. In general, it can be concluded the soils under Sal in both the area have more or less similar properties, hence soils are mainly governed by the vegetation as the climatic conditions and topography of both the area was nearly same. Soils normally enriched by the litter produced by the vegetation which undergo many transformations and later on released the nutrients. Both the sites were covered with the same vegetation i.e. Sal therefore, soil nutrient concentration was similar.
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International Journal of Current Microbiology and Applied Sciences, Dec 10, 2017
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International Journal of Botany and Research, 2018
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Dendrocalamus strictus (Roxb.) Nees has started flowering and synchronous flowering can be observ... more Dendrocalamus strictus (Roxb.) Nees has started flowering and synchronous flowering can be observed in the hillslopes and roadside of Mussoorie and vicinity areas. The synchronous flowering of D. strictus was observed in few locations along hillslopes of Mussoorie – Dehradun roadway. The GPS locations of the site are 30024’55’ N and 7804’41’E, 30024’52” N and 7804’43” E and 30024’49” and 7804’43” E at an elevation of around 1130 msl. The bamboo clumps were overladen with flowers showing synchronous flowering.
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Oroxylum indicum is a medicinally important forest tree species. Due toindiscriminate exploitatio... more Oroxylum indicum is a medicinally important forest tree species. Due toindiscriminate exploitation for medicinal purpose, habitat destruction, the natural population of O. indicum is reported endangered. Therefore an experiment was conducted to to study the effect of bioinoculation on the growth and quality of the seedlingsand conserve the plant species. The seedlings were inoculated with plant growth promoting microbes mainly, bacteria (B), fungus(F) and mycorrhiza (M), both alone and consortium. The total biomass was maximum (156.01±1.94) in TF treatmentand minimum (118.78±0.06) in Control treatment. The biovolume index was maximum (64.15±3.088) in TM+B+Fand minimum (14.43±0.33) in Control treatment. The Quality index (Qi) of the seedlings was maximum (1.041±0.089) in TB (seedlings treated with bacteria) while, Qi was minimum (0.761±0.090) in Control treatment.
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The seedlings of Oroxylum indicum were inoculated with plant growth promoting microbes (PGPMs) ma... more The seedlings of Oroxylum indicum were inoculated with plant growth promoting microbes (PGPMs) mainly, Pseudomonas putida, Trichoderma harzianum and Glomus mosseae both alone and consortium. The preliminary qualitative and quantitative phytochemical analysis of the root extract of the inoculated seedlings of O. indicum showed the presence of carbohydrates, protein, saponins, tannins, alkaloids, phenols, flavonoids, terpenoids, and glycosides. The tannin concentration was found maximum (0.0500±0.037 mg/g) in TM (mycorrhizal treatment), while it was minimum (0.0341±0.321 mg/g) in noninoculated/control treatment. Maximum (0.993±0.006 mg/g) chlorophyll content was present in TMB (Mycorrhizal + Bacterial treatment) and minimum (0.639±0.01 mg/g) in control treatment. The total alkaloid content was maximum (0.769±0.031) in TMB (Mycorrhizal + Bacterial treatment) while it was minimum (0.115±0.055) in control treatment. The total protein content was maximum (960.65±0.065 mg/g) in TMBF (Mycor...
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Dendrocalamus strictus (Roxb.) Nees has started flowering and synchronous flowering can be observ... more Dendrocalamus strictus (Roxb.) Nees has started flowering and synchronous flowering can be observed in the hillslopes and roadside of Mussoorie and vicinity areas. The synchronous flowering of D. strictus was observed in few locations along hillslopes of Mussoorie-Dehradun roadway. The GPS locations of the site are 30024'55' N and 7804'41'E, 30024'52" N and 7804'43" E and 30024'49" and 7804'43" E at an elevation of around 1130 msl. The bamboo clumps were overladen with flowers showing synchronous flowering.
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GSCPBS, 2020
The seedlings of Oroxylum indicum were inoculated with plant growth promoting microbes (PGPMs) ma... more The seedlings of Oroxylum indicum were inoculated with plant growth promoting microbes (PGPMs) mainly, Glomus mosseae, Trichoderma harzianum and Pseudomonas putida both alone and consortium. The GCMS analysis of the methanolic root extract of inoculated seedlings of O. indicum showed that seedlings treated with mixed consortium of mycorrhizal fungi, bacteria and fungus showed the presence of maximum number of phytocompounds. The GC-MS analysis of control seedlings showed presence of 55 compounds where three new compounds were found i.e. 2-Cyclobutene-1-Carboxamide; Tetradecanoic Acid, 10, 13-dimethyl-, methyl ester; 1-methylene-2b-hydroxymethyl-3, 3-dimethyl-4b-(3-methylbut-2-enyl)-cy. 53 compounds were found in seedlings treated with mycorrhizae i.e., Glomus mosseae, and three new compounds were found i.e., 1-Ethyl-2-Hydroxymethylimidazole; Octadecanoic Acid, 11-Methyl-, methyl ester; 4-Methyl-1, 4-Heptadiene. The seedlings treated with bacteria i.e. Pseudomonas putida showed the presence of 52 compounds and three new compounds were found i.e. Meso-4, 5-octanediol; 1-ethyl-2-hydroxymethylimidazole; 2, 5-cyclohexadiene-1, 4-dione, 2, 5-dihydroxy-3-methyl-6-(1-methylethyl)-. A total of 56 compounds were present in seedlings treated with fungus i.e. Trichoderma harzianum and five new compounds were found i.e. 2-CyclohexeN-1-one, 2-Butyl-3-Methoxy; Methyl 12, 13-Tetradecadienoate; Methyl 6, 9, 12-hexadecatrienoate; 1, 9-Decadiyne; 1, 4-Naphthalenedione. The seedlings treated with dual consortium of mycorrhizae and bacteria showed the presence of 88 compounds and five new compounds were found i.e., N-(1-Methoxycarbonyl-1-methylethyl)-4-methyl-2-aza-1,3-dioxane;1-ethyl-2 hydroxy methylimidazole; Methyl 8-methyl-nonanoate; Naphthalene, 1,2,3,4,4a,5,6,8a-octahydro-4a,8-dimethyl; Methyl 12,13-tetradecadienoate. 152 compounds were present in seedlings treated with dual consortium of mycorrhizal fungi and fungus and ten new compounds were found to be present i.e. 1,9-Decadiyne; 3,7,11-Trimethyl-3-hydroxy-6,10-dodecadien-1-yl acetate; 3-Heptyne, 7-chloro; 3-Methyl-4-(methoxycarbonyl) hexa-2,4-dienoic acid; Benzo[c]cinnolin-2-amine ; Tetradecanoic acid, 10,13-dimethyl-,Methyl ester; Cis,cis-4,6-octadienol; 2-Cyclohexen-1-one, 2-butyl-3-methoxy; Methyl 12,13-tetradecadienoate; 2-Aminopyridazino(6,1-b) quinazolin-10-one. A total of 36 compounds were present in seedlings treated with dual consortium of bacteria and fungi and two new compounds were found i.e. [1,4] Dioxino [2,3-b]-1,4-dioxin, hexahydro-2,3,6,7 ; 1-Ethyl-2-hydroxymethylimidazole. The seedlings inoculated with mixed consortium of mycorrhizae, bacteria and fungus showed the presence of 213 compounds and fourteen new compounds were found i.e. 3,7,11-Tridecatrienenitrile, 4,8,12-Trimethyl; 1,9-Decadiyne; 2,6,10,14,18,22-Tetracosahexaene, 2,6,10,15,19,23-Hexamethyl-, (ALL-E) ; 1-Methylene-2b-hydroxymethyl-3,3-dimethyl-4b-(3-methylbut-2-enyl)-cy; 1,9-Decadiyne, Cyclobutane, 1,2-bis(1-methylethenyl)-, trans-, 3,7,11-Trimethyl-3-hydroxy-6,10-dodecadien-1-yl acetate, 5-Hydroxy-4-hydroxymethyl-1-(1-hydroxy-1-isopropyl)cyclohex-3-ene, 5,8,11,14-Eicosatetraenoic acid, methyl ester, (all-z)-, 1-Cyclohexyl-2-buten-1-ol (c,t) , 1-Oxetan-2-one, 4,4-diethyl-3-methylene-, Tetradecanoic acid, 10,13-dimethyl-, methyl ester, 2-Cyclohexen-1-one, 2-butyl-3-methoxy-, Methyl 12,13-tetradecadienoate, Heptacosanoic acid, 25-methyl-, methyl ester Hexadecanoic Acid, Methyl Ester; 2-Chloroethyl Linoleate; 9,12-Octadecadienoic Acid, Methyl Ester, (E,E); Butanoic GSC Biological and Pharmaceutical Sciences, 2020, 13(03), 228-243 229 acid, methyl ester; 4A,5,6,7,8,8A(4H) HexahydroBenzopyran-3-Carboxamide, 8A-Methoxy-4A-M,
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The rhizospheric soil and roots were collected from five different sites of Northeast India, wher... more The rhizospheric soil and roots were collected from five different sites of Northeast India, where Oroxylum indicum was naturally growing in its ecological habitat and were analysed. The study revealed that the roots of O. indicum were colonized with AM spores and the soil nutrient content plays a major role in the colonization of the AM spores. A total of 23 species of AM fungi belonging to four genera viz., Glomus, Acaulospora, Gigaspora, Entrophospora and Pacispora were recovered from the rhizosphere of O. indicum. The statistical analysis of the data revealed that the AM spore count is positively correlated with the soil nutrient status. AM spore count was maximum in forest fringe and agricultural farmland, hyphal and arbuscular colonization percentage was higher in agricultural farmland, while the vescicular colonization percentage was maximum in the rhizospheric soil of agricultural farmland and forest fringe areas. The AM spore count of O. indicum growing near the roadside showed positive correlation with root colonization. The correlation value of (0.766, 0.413, and 0.567) was obtained when root colonization was compared with soil organic carbon percentage, soil nitrogen and potassium content.
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The rhizospheric soil samples were collected from five different sites of Northeast India where O... more The rhizospheric soil samples were collected from five different sites of Northeast India where Oroxylum indicum was naturally growing in its ecological habitat and were analysed. A total of 25 fungal species and four bacterial isolates were found to be associated in the rhizosphere of O.indicum. The fungal microbiota comprised mainly of Trichoderma harzianum, Penicillium sp., Aspergillus sp., Trichoderma viride, Fusarium sp., Penicillium funiculosum, Penicillium capsulatum, Penicillium citrinum, Pachybasium sp., Trichoderma hamatum, Mucor sp., Verticillium sp., Curvularia sp., Rhizomucor sp., Pythium sp., Rhizoctonia sp., Colletrotrichum sp. etc. While the bacterial isolates mainly comprised of Four bacterial isolates Pseudomonas putida, Pseudomonas sp., Streptobacillus sp., Bacillus sp. The overall analysis of soil nutrient status showed that pH status was higher in roadside and riverside, while mimum pH was found in forest fringe and hillslope. The % Organic Carbon was found to be highest in agricultural farmland and lowest in hillslope. Available Nitrogen was highest in agricultural farmland, while it was minimum in forest fringe. Available Phosphorus was again highest in agricultural farmland while it was lowest in riverside and forest fringe areas. Available Potassium was highest in hillslopes and agricultural farmland while it was lowest along riverside.
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The seedlings of Oroxylum indicum were inoculated with plant growth promoting microbes (PGPMs) ma... more The seedlings of Oroxylum indicum were inoculated with plant growth promoting microbes (PGPMs) mainly, Pseudomonas putida, Trichoderma harzianum and Glomus mosseae both alone and consortium. The preliminary qualitative and quantitative phytochemical analysis of the root extract of the inoculated seedlings of O. indicum showed the presence of carbohydrates, protein, saponins, tannins, alkaloids, phenols, flavonoids, terpenoids, and glycosides. The tannin concentration was found maximum (0.0500±0.037 mg/g) in TM (mycorrhizal treatment), while it was minimum (0.0341±0.321 mg/g) in non-inoculated/control treatment. Maximum (0.993±0.006 mg/g) chlorophyll content was present in TMB (Mycorrhizal + Bacterial treatment) and minimum (0.639±0.01 mg/g) in control treatment. The total alkaloid content was maximum (0.769±0.031) in TMB (Mycorrhizal + Bacterial treatment) while it was minimum (0.115±0.055) in control treatment. The total protein content was maximum (960.65±0.065 mg/g) in TMBF (Mycorrhizal + Bacterial + Fungal treatment) while it was minimum (299.04±0.0943 mg/g) in control treatment. The total phenolic content (TPC) was maximum (29.271± 0.388 mg/g in GAE) in TB (Bacterial treatment) while TPC was minimum (3.1±1.01 mg/g in GAE) in Control treatment. It can be concluded that the bioinoculants whether alone or in consortial form influences the phytochemicals in O. indicum but the consortial form has significant influence than alone treatments.
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Oroxylum indicum is a medicinally important forest tree species. Due toindiscriminate exploitatio... more Oroxylum indicum is a medicinally important forest tree species. Due toindiscriminate exploitation for medicinal purpose, habitat destruction, the natural population of O. indicum is reported endangered. Therefore an experiment was conducted to to study the effect of bioinoculation on the growth and quality of the seedlingsand conserve the plant species. The seedlings were inoculated with plant growth promoting microbes mainly, bacteria (B), fungus(F) and mycorrhiza (M), both alone and consortium. The total biomass was maximum (156.01±1.94) in T F treatmentand minimum (118.78±0.06) in Control treatment. The biovolume index was maximum (64.15±3.088) in T M+B+F and minimum (14.43±0.33) in Control treatment. The Quality index (Qi) of the seedlings was maximum (1.041±0.089) in T B (seedlings treated with bacteria) while, Qi was minimum (0.761±0.090) in Control treatment.
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Oroxylum indicum is an important medicinal plant of Indian Ayurvedic medicine system. The natural... more Oroxylum indicum is an important medicinal plant of Indian Ayurvedic medicine system. The natural population of the plant is nearing to its threshold of extinction. Therefore, its conservation is must and on this aspect an experiment was performed to see the effect of different seed sources and habitats under a single eco-region of Brahmaputra Valley i.e. semi- evergreen forests of Assam on its seed germination by common and feasible natural germination methods. It is found that number of seeds per gram were more (25.66±1.45) in Nalbari seed source than rest of the locations but the seed germination percentage was low or minimum (25-50%) in this seed source and even the seeds were infected with intact seed fungus like Curvularia species while the seed source of North Lakhimpur had maximum seed germination percentage (70-100%) in all the studied treatments followed by Guwahati seed source. The Seedling Emergence Index (SEI) was high (1.0±0.45) in Nalbari seed source whereas minimum (0.00058±0.047) in North Lakhimpur seed source. The more the Seedling Emergence index value, the poorer is the seed germination percentage
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Papers by Dr. Chandrima Debi