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Influence of Temperature on Microsporidian Multiplication and Spore Production in Various Tissues of Silkworm (Bombyx mori L.) During Larval Development

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Abstract

Multiplication and spore production of three microsporidia viz., Nosema bombycis, Nosema sp. 1 and Nosema sp. 2 in fifth instar larval tissues of silkworm, Bombyx mori L. in two seasons with distinct temperature regimes were studied. Nosema sp. 2 produced significantly (P < 0.01) higher number of spores in various tissues. Among the tissues, spore production was highest in silk gland, followed by fat body and gut. Spore production was significantly (P < 0.01) higher in season-II (Average temperature 29.4 ± 1.1oC). Maximum spore production was observed 25 days post inoculation (p. i.) in season-I (Average temperature 18.9 ± 1.1oC), whereas in season-II, it was 14 days p. i. In season-I, spore production was low up to 21 days p. i., then increased sharply. In season-II, there was a steady increase in spore production. The results indicate that the microsporidian multiplication is tissue specific and extremely sensitive to temperature at which the host is reared. It also reveals that, silk gland, fat body and gut are the most appropriate tissues for microscopic identification of microsporidia in the larval stage.

참고문헌 (24)

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관련 논문AI추천

Microsporidian Multiplication and Spore Production in Various Tissues of Pupa and Adult, in Relation to Age and Development of Silkworm, Bombyx mori L. (Lepidoptera: Bombycidae)Beera Saratchandra, Durga Prasad Haldar, Madana Mohanan Nanu, Sunil Kumar Gupta한국잠사학회 · International Journal of Industrial Entomology and Biomaterials2009 · 제18권 제2호Seasonal Impact of Microsporidian Infection on the Reproductive Potential of Silkworm, Bombyx mori L. (Lepidoptera: Bombycidae)B. Saratchandra, D. P. Haldar, N. K. Das, N. Krishnan, N. Madana Mohanan, P. Mitra한국잠사학회 · International Journal of Industrial Entomology and Biomaterials2005 · 제11권 제2호Microsporidian Disease of the Silkworm, Bombyx mori L. (Lepidoptera: Bombycidae)Beera Saratchandra, Tribhuwan Singh한국잠사학회 · International Journal of Industrial Entomology and Biomaterials2003 · 제6권 제1호Mode of Transmission of A New Microsporidian and Its Affect on Fecundity and Hatching in Silkmoth, Bombyx mori L.B. Nataraju, Shabir Ahmad Bhat한국잠사학회 · International Journal of Industrial Entomology and Biomaterials2005 · 제11권 제2호Influence of Temperature and Relative Humidity in Infection of Nosema bombycis (Microsporidia: Nosematidae) and Cross-infection of N. mylitta on Growth and Development of Mulberry Silkworm, Bombyx moriBuddhadeb Manna, Satadal Chakrabarti한국잠사학회 · International Journal of Industrial Entomology and Biomaterials2008 · 제17권 제2호A Report on the Impact of a Microsporidian Parasite on Lamerin Breed of the Silkworm Bombyx mori L.B. Nataraju, Shabir Ahmad Bhat한국잠사학회 · International Journal of Industrial Entomology and Biomaterials2005 · 제10권 제2호

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