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Light-dependent transcriptional events during resting egg hatching of the rotifer Brachionus manjavacas


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タイトル: Light-dependent transcriptional events during resting egg hatching of the rotifer Brachionus manjavacas
著者: Kim, Hee-Jin / Suga, Koushirou / Kim, Bo-Mi / Rhee, Jae-Sung / Lee, Jae-Seong / Hagiwara, Atsushi
発行日: 2015年 4月
出版者: Elsevier
引用: Marine Genomics, 20, pp.25-31; 2015
抄録: Rotifer resting eggs often have to endure harsh environmental conditions during the diapause phase. They are stimulated by light to hatch. In order to study the hatching mechanism, we observed resting eggs and measured their transcriptional expression under different light exposure periods (total darkness, and after 30. min, and 4. h light). By using differential-display reverse transcription PCR (DDRT-PCR), we isolated 80 genes that displayed different expression patterns in response to the three light treatments: 20 genes were expressed in total darkness, 40 different genes were differentially expressed under 30. min light, and 20 further genes were expressed after 4. h of light. The resting eggs showed no phenotypic differences in embryonic development during the 4. h illumination period. In general, the expression patterns of the analyzed genes in resting eggs were differentially modulated by light exposure time. In total darkness, resting eggs mainly expressed genes encoding cell defense and homeostasis functions. In the 30. min illumination group, we found enriched expression of genes encoding fatty acid metabolism-related components, including Acyl-CoA dehydrogenase (ACAD). Genes encoding cellular and embryonic developmental functions were highly observed in the 30. min-illuminated group but were not observed in the 4. h-illuminated group. Real-time RT-PCR revealed that several transcripts such as encoding V-type H(+)-translocating pyrophosphatase (V-PPase) and Meckelin had prolonged expression levels when exposed to light for 4. h. In the 4. h illuminated group, the RecQ protein-like 5 (RECQL5) gene was enriched. This RECQL5 gene may be expressed to protect the developing embryo from continuous light exposure. The data presented in this study indicate that DDRT-PCR-aided gene screening can be helpful to isolate candidate genes involved in the hatching process.
キーワード: Hatching / Light / Resting egg / Rotifera / Transcriptional expression
URI: http://hdl.handle.net/10069/35264
ISSN: 18747787
DOI: 10.1016/j.margen.2015.02.003
権利: © 2015 Elsevier B.V. / NOTICE: this is the author’s version of a work that was accepted for publication in Marine Genomics. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Marine Genomics, 20, (2015)
資料タイプ: Journal Article
原稿種類: author
出現コレクション:085 学術雑誌論文

引用URI : http://hdl.handle.net/10069/35264

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