Browsing by Author "Chakraborty, Arka Pratim"

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Open Access
Concept of The Genus Acampe (Lindl.) in India
(University of North Bengal, 2022) Chakraborty, Oindrila; Agrawala, Dinesh Kumar; Chakraborty, Arka Pratim
Genus Acampe Lindl. (Orchidaceae) has been taxonomically studied in Indian context. Out of 10 species of Acampe found globally, four species and one variety were recognized in India. Detailed taxonomic account including description, illustrative photo-plate along with information on phenology, habitat and distribution have been provided. The threat status of each taxon has been assessed in Indian perspective by following the IUCN guidelines.
Open Access
Evaluation of streptomyces and non-streptomyces actinomycetes isolates for growth promotion in Vigna radiata and their use as biocontrol agent against Sclerotium rolfsii
(University of North Bengal, 2016-03) Ray, Pushpanjali; Chakraborty, Arka Pratim; Chakraborty, Bishwanath
Two streptomyces (ARHS/PO26 and ARHS/PO27) and two non streptomyces (ARHS/Mn3 and ARHS/Mn7) actinomycetes isolates obtained from the rhizosphere soil of Solanum tuberosum and Mangifera indica were found to be phosphate solubilizers and showed antagonistic activity against Sclerotium rolfsii. Isolates ARHS/PO26 and ARHS/PO27 were identified morphologically and confirmed by the National Centre for Fungal Taxonomy, as Streptomyces griseus (NCFT 2578.08; NAIMCC-B-00916) and Streptomyces griseolus (NCFT 2579.08). ARHS/Mn 3 and Streptomyces griseolus (ARHS/PO27) could inhibit 68% and 59.7% growth of Sclerotium rolfsii in vitro. In vivo evaluation of the isolates ARHS/Mn 3, Streptomyces griseolus (ARHS/PO27) and Streptomyces griseus (ARHS/PO26) showed maximum growth promotion on Vigna radiata by enhancing key defense enzymes like chitinase, β-1,3-glucanase, phenylalanine ammonia lyase and peroxidase. The results emphasize the fact that soil actinomycetes could be used as potential biocontrol agents.
Open Access
New Report on Fusarium equiseti Causing Yellow Leaf Disease of Brassica juncea (L.) Czern from Karandighi, Uttar Dinajpur, West Bengal, India
(University of North Bengal, 2022) Swarnakar, Shambhu; Chowhan, Papan; Tiru, Zerald; Mandal, Parimal; Chakraborty, Arka Pratim
Yellow leaf disease in B-9 variety of yellow mustard [Brassica juncea (L.) Czern] was noticed in the area of Khowaspur, Karandighi, Uttar Dinajpur District, West Bengal. Irregularly shaped dull yellow regions along the leaf margin and even in the midrib of leaf were observed. Fusarium equiseti (Corda) Sacc. (ON783721.1) was isolated and identified as causal potent fungal isolate causing yellows in leaves of Brassica juncea.
Open Access
Studies on bacillus megaterium and serratia marcescens as plantgrowth promoter and biocontrol agents
(University of North Bengal, 2013-08) Chakraborty, Arka Pratim; Chakraborty, Usha and Chakraborty B N
Open Access
Unravelling the Roles of Plant Growth Promoting Rhizobacteria (PGPR) in Growth Promotion, Phytoremediation and as Biocontrol Agents to Suppress Plant Diseases
(University of North Bengal, 2023) Swarnakar, Shambhu; Chakraborty, Arka Pratim
Agriculture in the twenty-first century has several issues, including soil fertility, climate changes, environmental degradation, urbanisation & rising food consumption to feed the world's growing population. Meanwhile, scientists are grappling with major obstacles in expanding food yield from the present land base. Traditional farming has seen increased per-acre crop yields due to the haphazard and injudicious use of agrochemicals, such as pesticides and synthetic fertilisers, but at a significant environmental cost. Crop pests developing pesticide resistance is another big worry in modern agriculture. Therefore, alternative ecologically friendly crop yield-increasing techniques are necessary for the future of sustainable crop production. Scientists are very interested in utility of rhizobacteria, particularly PGPR, as an alternative to pesticides. These rhizobacteria employ a range of tactics to encourage plant growth, thwart plant pests, and foster resilience to abiotic stresses. The mechanisms of rhizobacteria involved in soil bioremediation, pest biocontrol, and plant growth promotion are reviewed in this article. It also looks at how PGPR vaccination affects plant growth and survival in challenging conditions. An in-depth examination is also given of the benefits and drawbacks of rhizobacterial application as well as potential solutions for rhizobacteria's long-term use in agriculture.