Developmental expression of Apnanos during oogenesis and embryogenesis in the parthenogenetic pea aphid Acyrthosiphon pisum

The International Journal of Developmental Biology
Chun-che ChangR P-Y Chen

Abstract

Among genes that are preferentially expressed in germ cells, nanos and vasa are the two most conserved germline markers in animals. Both genes are usually expressed in germ cells in the adult gonads, and often also during embryogenesis. Both nanos-first or vasa-first expression patterns have been observed in embryos, implying that the molecular networks governing germline development vary among species. Previously we identified Apvasa, a vasa homologue expressed in germ cells throughout all developmental stages in the parthenogenetic and viviparous pea aphid Acyrthosiphon pisum. In asexual A. pisum, oogenesis is followed by embryogenesis, and both occur within the ovarioles. In order to understand the temporal and spatial distribution of nanos versus vasa during oogenesis and embryogenesis, we isolated a nanos homologue, Apnanos, and studied its expression. In adults, Apnanos is preferentially expressed in the ovaries. In early embryos, Apnanos transcripts are localized to the cytoplasm of cellularizing germ cells, and soon thereafter are restricted to the newly segregated germ cells in the posterior region of the cellularized blastoderm. These results strongly suggest that the Apnanos gene is a germline marker and is involved ...Continue Reading

Citations

Apr 25, 2012·Development Genes and Evolution·Paula Rezende-TeixeiraGláucia Maria Machado-Santelli
Feb 2, 2016·Micron : the International Research and Review Journal for Microscopy·Jian-Yang GuoGong-Yin Ye
Feb 27, 2013·Developmental Biology·Elizabeth J DuncanPeter K Dearden
Feb 19, 2013·Developmental Biology·Elizabeth J DuncanPeter K Dearden
Feb 9, 2012·Developmental Biology·Lucas LeclèreEvelyn Houliston

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