Deen Dayal Upadhyay Gorakhpur University

About: Deen Dayal Upadhyay Gorakhpur University is a education organization based out in Gorakhpur, Uttar Pradesh, India. It is known for research contribution in the topics: Thermal decomposition & Lymnaea acuminata. The organization has 1032 authors who have published 1591 publications receiving 21734 citations. The organization is also known as: Gorakhpur University.

Commonness and rarity pattern of plant species within Terai grassland of northeastern Uttar Pradesh, India

Abstract: We investigated the frequency of occurrence of plant species in grassy landscapes in northeastern Uttar Pradesh, India. Using random quadrats, field assessment was undertaken at 11 sites to sample an area of 333.75 ha, at an overall sampling density of 0.01%. A total of 287 plant species belonging to 183 genera and 53 families was recorded. Of these, 254 species were commonly distributed and 33 species exhibited localized occurrences; according to the rarity classes of Rabinowitz, the latter were classified as rare. One hundred and sixty-five species had large population sizes and 122 species exhibited small population sizes. The most common species, which exhibited high frequency and abundance, were predominantly from Poaceae, Cyperaceae, Papilionaceae, Asteraceae, Scrophulariaceae and Euphorbiaceae. Some species, which are known to have narrow geographical distributions, were locally abundant. Rare species showed restricted as well as localized distributions and were typically sampled at low population densities. The rare occurrences of once frequent and widespread species probably reflect acute fragmentation and shrinkage of specialized habitats as a result of intense cultural activities. Several species are to be considered as threatened. Studies on the status of rare plant species and the processes threatening their survival are urgently required. Keywords: Community structure, frequency of occurrence, habit groups, habitat fragmentation, native grassland. DOI: 10.17138/TGFT(3)161-186

Binuclear oxovanadium(IV) complexes of phthalazine hydrazone ligands

Abstract: The oxovanadium(IV) complexes [(VOSO4·H2O)2L] and [(VO)2L1(μ-SO4)] (L = hydrazone ligands derived from 1,4-dihydrazinophthalazine and benzaldehyde, 4-chlorobenzaldehyde, 4-methoxybenzaldehyde or acetophenone; L 1H2 = hydrazone ligands derived from 1,4-dihydrazinophthalazine and salicylaldehyde, 2-hydroxyacetophenone or 2-hydroxynaphthaldehyde) have been prepared and characterized by elemental analyses, electrical conductance, magnetic moments and spectral data. Reduced magnetic moments are observed for all sulfato-bridged derivatives, indicating antiferromagnetically coupled vanadium(IV) centres. The vanadium(IV) centres appear to have five-coordinated stereochemistries in the systems which involve two metals bound to each ligand. The thermal behaviour of the complexes was investigated by t.g. and d.t.g. techniques. The antifungal and antiviral activities of the hydrazones and their corresponding complexes were also investigated. The screening results have been correlated with the structural features of the tested compounds.

Solanum sisymbriifolium Lam. (Solanaceae): a new invasive undershrub of the old-fields of northeastern Uttar Pradesh

Abstract: Solanum sisymbriifolium Lam. (Solanaceae), an undershrub species, was first identified at an upland site in the suburb of Gorakhpur town during a broad survey on the distribution and abundance of grassland and old-field species of northeastern Uttar Pradesh. The species was first noticed in August 2012, and by the start of 2014 it showed a highly significant increase in its number and vegetal cover. Morphologically the species provides a spectacular plant body by virtue of numerous long orange-red spines found along the stem and leaves to the calyx, large white flowers with bright yellow anthers, and its red ripe fruits present for most of the year. The plant body is largely unpalatable and also resistant to grazers. The rapid spread of this species within a short span of about two years indicates the potential for this perennial shrub as a harsh invader of upland sites of the region. A brief account of habitat and population size along with a morphological description and line drawing is provided for easy identification of the species, which is not yet reported from Uttar Pradesh.

Diversity analysis of entomopathogenic nematodes against Helicoverpa armigera (Hübner) from Tarai region of IGP, India

Abstract: The Indo-Gangetic Plain (IGP) covers approximately 13% of the total geographical area of India and produces nearly 50% of the country’s food grains to feed 40% of the total population of the country. The production of grains was, however, not uniform across the IGP regions because of the spatial variation in land-resource characteristics and socioeconomic in the region. Our study includes diversity analysis of entomopathogenic nematodes from Tarai region of IGP (Gorakhpur, Deoria, Kushinagar and Maharajganj Districts), India. The diversity analysis of entomopathogenic nematodes effective against H. armigera from soils of Gorakhpur, Deoria, Kushinagar and Maharajganj regions of Gorakhpur division were carried out. The distribution of entomopathogenic nematodes were positively correlated with soil physiological properties such as soil temperature, soil porosity as well as relative humidity. A total of 36 isolates representing three and two different species of Steinernematid and Heterorhabditid genera were isolated. Based on morphometric data, the nematode species were identified as Steinernema abbasi , S . masoodi , S. seemae, Heterorhabditis indica and H. bacteriophora . The distribution frequency of entomopathogenic nematodes was found to be 58.3%, 27.8% and 13.9% from cultivated fields, non-cultivated fields and forests/gardens soils respectively. The diversity index (Shannon, Simpson, Margalef’s and Pielou index) was also calculated. The PCA analysis was also carried out by using factor 1 and 2 at 58.60% and 25.92% of the total variances respectively.