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Your search keyword '"Bhattacharyya, P. N."' showing total 146 results
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146 results on '"Bhattacharyya, P. N."'

25. Abstracts

Author

Basu, J., Rohatgi-Mukherjee, K. K., Chatterjee, S., Sarkar, S., Bhattacharyya, S. N., Dasmahapatra, G. K., Wolff, Thomas, Von Bunau, Gunther, Dhawan, S. N., Sen, Dipankar, Bera, Subhash Ch, Gupta, S. C., Yadav, N. S., Sahu, Manabendra, Saha, Manjubikash, Masilamani, V., Sastikumar, D., Behera, Pradipta Kumar, Mishra, Ashok Kumar, Muthusamy, S., Ramakrishnan, V. T., Ramamurthy, P., Sampath, S., Narayan, R., Manickam, M. C. Durai, Srinivasan, C., Pitchumani, K., Roja, M., Rajagopal, S., Ray, Reba, Mukherjee, Samaresh, Samanta, A., Natarajan, E., Selvaraj, S., Natarajan, P., Talwar, S. S., Viswanathan, K., Natarajan, P., Dhathathreyan, Aruna, Dhathathreyan, K. S., Biswal, Basanti, Song, Pill-Soon, Das, S., Muneer, M., Haridas, A., Manilal, V. B., Jayakumar, R., Ramasami, T., Julliard, M., Chanon, M., Joshi, P. N., Biswal, U. C., Joshy, C. L., Purushothaman, E., Maiya, Bhaskar G., Ganesan, S., Nagarajan, B., Narayanan, V., Mohanty, Prasanna, Shubin, V., Murthy, S. D. S., Karapetyan, N. V., Ramaraj, R., Gobi, K. V., Sankareswari, V. Gomathi, Ranganayaki, S., Bahadur, K., Kumar, Sajal, Sonawane, H. R., Kulkarni, D. G., Ayyangar, N. R., Sukumar, N., Venkitachalam, T. V., Rao, A. S., Ali, S. I., Kaur, Harpal, Anbalagan, V., Srivastava, T. S., Kumar, Awadhesh, Chowdhury, P. K., Rao, K. V. S. Rama, Mittal, J. P., Balasubramanian, N., Balasubramanian, S., Dutt, G. B., Doraiswamy, S., Manna, Bidyut Kumar, Rohatgi-Mukherjee, K. K., Chandra, A., Bagchi, B., Arunachalam, S., Devadason, J. R., Dhanasekaran, T., Prabahar, K. Joseph, Mathew, Lizamma, Ramakrishnan, V., Rajaram, J., Rao, V. R. S., Narayanan, P., Pillai, V. N. Sivasankara, Priyadarsini, K. I., Rajendran, T., Palaniandavar, M., Kaneko, M., Kira, A., Sidhu, M. S., Chopra, Arti, Gill, Barinder, Baby, Thomas, and Nampoori, V. P. N.

Published
1992
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33. Fungal endophytes associated with the ethnomedicinal plant Meyna spinosa Roxb

Author

Bhattacharyya, L. H., Borah, Gayatree, Parkash, Vipin, and Bhattacharyya, P. N.

Subjects
Endophytes, Fungi, Meyna spinosa, Kutkura, Bioactive compounds
Abstract

Endophytes are a group of microorganism that grow within the tissues of higher plants and colonize them without causing any noticeable injury to the host. Both bacteria and fungi are considered as endophytes. As endophytes represent a potential hub of novel bioactive compounds such as antibiotics, anticancer and other biological control agents, scientific investigations to explore the diversity of endophytic microbes seemed to be significant. Meyna spinosa Roxb. belongs to the family Rubiaceae (local name: Kutkura) is a medium sized tree with potent medicinal properties. Altogether seven endophytic fungal genera were isolated from the roots, stems and leaves of the target species and thus, maximum fungal species were isolated from various parts of this target plant. More fungus was reported in the stems as compared to the leaves and roots. Fungal identification was based on the colony morphology and examination of spores/conidia or fruiting bodies using stereo and light compound microscopes. Absidia sp., Aspergillus sp., Cladosporium sp., Cunninghamella sp., Fusarium sp., Nigrospora sp., Paecilomyles sp., Penicillium sp., Rhizopus sp., etc. represents among the identified endophytic genera in the present investigation. A large number of sterile mycelia were also observed in association with the target species. Studies on enumeration of endophytic fungal diversity of Meyna spinosa and assessing their bioactive potential are important to explore this beneficial microbiota to promote human welfare.

Published
2017
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34. Microbial biocides - Viable alternatives to chemicals for tea disease management.

Author

SARMAH, S. R., BHATTACHARYYA, P. N., and BAROOAH, A. K.

Subjects
BIOCIDES, CONTROL of phytopathogenic microorganisms, FUSARIUM solani, TEA plantations, FUNGICIDES, CROP yields
Abstract

Tea plantations in North east India are mostly rain fed and the cropping season needs moist climate with alternating wet and dry periods that eventually attracts diverse tea pathogens like Fusarium solani, Cephaleuros spp., Corticium spp. Poria hypobrunnea, Ustulina zonata, Fomes lamaoensis etc., known to cause several serious diseases in tea and thereby make enormous losses to crop yield and quality, influencing world tea market, adversely. Tea disease management using chemical fungicides alone is, however, prohibitive since the latter is known for destabilizing soil fertility and thereby directly affects the native microbial populations present in soil. Application of new fungicide molecules at its low doses along with exploitation of biological substances (more especially, microbial biocontrol agents) and adoption of Integrated Disease Management (IDM) schedule has been practiced in the present investigation for controlling certain devastating diseases in tea plantation of North East India. Multilocational field trials has been made throughout the investigations using locally isolated microorganisms such as Azotobacter, Azospirillum, Bacillus, Pseudomonas, Streptomyces, Trichoderma etc. (@ 2%, 5% and 10% spore concentrations), along with crude extracts of botanicals (@ 5% concentration) prepared from Amphineuron opulentum, Cleome gynandra, Ipomea convolvulus, Polygonum hydropiper etc. against dominant tea diseases such as black rot, red rust and Fusarium die back respectively. Maximum emphasis has been made to reduce the load of chemicals and move towards alternative strategies of tea disease management as to promote sustainable tea cultivation. Biological control measures (especially microbial) have potential to reduce the disease severity (up to 78.2% disease reduction) and thereby brought impending perspective for the use of effective biopesticides in tea ecosystem. The potential microbial strains were identified using morphological, biochemical as well as molecular characterization and deposited at NCBI GenBank database with accession numbers. The application technology of microbial biocides has also being popularized among the tea growers throughout the region to accelerate the use of these beneficial microorganisms in tea. [ABSTRACT FROM AUTHOR]

Published
2020
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