Evidence against a germ plasm in the milkweed bug Oncopeltus fasciatus, a hemimetabolous insect
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منابع مشابه
Evidence against a germ plasm in the milkweed bug Oncopeltus fasciatus, a hemimetabolous insect
Primordial germ cell (PGC) formation in holometabolous insects like Drosophila melanogaster relies on maternally synthesised germ cell determinants that are asymmetrically localised to the oocyte posterior cortex. Embryonic nuclei that inherit this "germ plasm" acquire PGC fate. In contrast, historical studies of basally branching insects (Hemimetabola) suggest that a maternal requirement for g...
متن کامل04-P012 Germ line specification in the milkweed bug, Oncopeltus fasciatus (Hemiptera)
The body axes of many animals are initially patterned by the asymmetric distribution of maternal mRNAs and proteins in the oocyte. In Drosophila, these maternal factors are synthesized by the 15 nurse cells that connect to each oocyte within the ovary. However, insect ovaries fall into three anatomical categories, of which Drosophila represents only one. The telotrophic meroistic ovaries of the...
متن کاملDynamics of growth zone patterning in the milkweed bug Oncopeltus fasciatus
We describe the dynamic process of abdominal segment generation in the milkweed bug Oncopeltus fasciatus We present detailed morphological measurements of the growing germband throughout segmentation. Our data are complemented by cell division profiles and expression patterns of key genes, including invected and even-skipped as markers for different stages of segment formation. We describe morp...
متن کاملTransovum Transmission of Trypanosomatid Cysts in the Milkweed Bug, Oncopeltus fasciatus
Leptomonas wallacei is a trypanosomatid that develops promastigotes and cystic forms in the gut of the hemipteran insect Oncopeltus fasciatus. Insect trypanosomatids are thought to be solely transmitted from one host to another through the ingestion of parasite-contaminated feces. However, here we show that L. wallacei cysts present on the eggshells of eggs laid by O. fasciatus can also act as ...
متن کاملDevelopment and determination of hairs and bristles in the milkweed bug, Oncopeltus fasciatus (Lygaeidae, Hemiptera).
The term' organule' is proposed as an English equivalent for the German word' Kleinorgan'. The different organules on the third sternite of Oncopeltus are described: larvae possess innervated bristles and special sensilla termed 'chemosensilla', whereas the adult develops, in addition, a dense population of non-innervated hairs. The hairs, bristles and 'chemosensilla' each develop from mother c...
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ژورنال
عنوان ژورنال: Biology Open
سال: 2013
ISSN: 2046-6390
DOI: 10.1242/bio.20134390