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Expression pattern of Cubitus interruptus from the mulberry silkworm Bombyx mori in late developmental stages

Dhawan, Sangeeta and Gopinathan, KP (2003) Expression pattern of Cubitus interruptus from the mulberry silkworm Bombyx mori in late developmental stages. In: Development Genes and Evolution, 213 (4). pp. 166-177.

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Abstract

A partial genomic clone of Bombyx mori homologue of the segment polarity gene Cubitus interruptus (BmCi), encoding the conserved zinc finger domain and harbouring two introns, has been characterized. BmCi was expressed in the silkglands of B. mori from embryonic to the late larval stages(3rd, 4th and 5th intermoults). The expression was confined to the anterior region of the middle silkglands, overlapping with the domain of sericin-2 expression and excluding the domains of Bm invected expression, namely the middle and posterior regions of the middle silkglands. In the wing discs, the expression was restricted to the anterior compartment, which increased from 4th to 5th larval intermoults and declined later in the pupal wing buds. In gonadal tissues (both ovaries and testes) BmCi was expressed from the larval to pupal stages. The transcripts were localized to the sperm tubes containing spermatogonia in the testis of Bombyx larvae. BmCi expression, however, was not detected in any of these tissues during the moulting stages. Expression of Ci in the wing discs and gonads is evolutionarily conserved, while the silkgland represents a novel domain. Our results imply that BmCi is involved in the specification and maintenance of micro-compartment identity within the middle silkglands.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Springer.
Keywords: BmCi expression;Fate specification;Gonadal development; Segment polarity genes;Silkgland development;Wing discs
Department/Centre: Division of Biological Sciences > Microbiology & Cell Biology
Date Deposited: 29 Aug 2011 07:29
Last Modified: 29 Aug 2011 07:29
URI: http://eprints.iisc.ernet.in/id/eprint/40092

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