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Gametogenesis in the adult hermaphrodite of C. elegans PowerPoint Presentation
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Gametogenesis in the adult hermaphrodite of C. elegans - PowerPoint PPT Presentation


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Gametogenesis in the adult hermaphrodite of C. elegans. Chromosome structures in the gonad of the adult hermaphrodite. 0-8h: II (early embryogenesis) + III (diakinesis oocyte) 8-24h: III + IV + V + VI (diplotene to pachytene nuclei). (0- 8 h) (8 – 22< h).

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0-8h: II (early embryogenesis) + III (diakinesis oocyte)

8-24h: III + IV + V + VI (diplotene to pachytene nuclei)

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(0- 8 h) (8 – 22< h)

Egg hatchability in the wild-type hermaphrodite

after X-ray irradiation

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Egg hatchability in the wild-type hermaphrodite

after heavy ions and UV irradiation

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Conclusion

  • Meiotic pachytene nuclei were hyper-resistant to X-ray, 12C, and 18Ar-ion beam irradiation.
  • It suggests that general recombination activity during meiosis can effectively repair ds-breaks and gaps by X-ray, 12C, and 18Ar-ion beam irradiation.
  • A checkpoint kinase Ce-atl-1 (ATM/ATR like 1) was also involved in repair for X-ray and UV damages of mitotic and meiotic cells.