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The Pea Aphid Uses A Version Of The Terminal System During Oviparous, But Not Viviparous, Development, Ryan D. Bickel, Hillary C. Cleveland, Joanna Barkas, Caitlin C. Jeschke, Amelie A. Raz, David L. Stern, Gregory K. Davis
The Pea Aphid Uses A Version Of The Terminal System During Oviparous, But Not Viviparous, Development, Ryan D. Bickel, Hillary C. Cleveland, Joanna Barkas, Caitlin C. Jeschke, Amelie A. Raz, David L. Stern, Gregory K. Davis
Biology Faculty Research and Scholarship
Background: In most species of aphid, female nymphs develop into either sexual or asexual adults depending on the length of the photoperiod to which their mothers were exposed. The progeny of these sexual and asexual females, in turn, develop in dramatically different ways. The fertilized oocytes of sexual females begin embryogenesis after being deposited on leaves (oviparous development) while the oocytes of asexual females complete embryogenesis within the mother (viviparous development). Compared with oviparous development, viviparous development involves a smaller transient oocyte surrounded by fewer somatic epithelial cells and a smaller early embryo that comprises fewer cells. To investigate …