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- W2001158446 abstract "In the honey bee, vitellogenin has several functions in addition to egg provisioning. Among others, it serves as a precursor to brood food proteins secreted by the hypopharyngeal glands of worker bees. In queenless workers with developing gonads, oogenesis and development of the hypopharyngeal glands are correlated. Here we describe two experiments that explored whether this relationship also exists in non-reproductive workers, and investigated a possible role of ecdysteroid hormones in the regulation of vitellogenin uptake. In the first experiment, the correlation between oocyte length and hypopharyngeal gland development was measured in workers before and after de-queening. In the second experiment, we induced middle-aged bees with resting glands to suddenly initiate brood care behaviour, and measured haemolymph ecdysteroid and vitellogenin titres. A strong positive relationship existed between morphometrical parameters of hypopharyngeal glands and ovaries in both queenless and queenright (functionally sterile) workers. No response of ecdysteroid titres to the addition of brood was detected in experiment 2, but high concentrations were measured in a small group of bees characterised by the possession of oocytes on the brink of yolk incorporation. We conclude that hypopharyngeal glands may belong to a previously described group of reproduction-related traits that are pleiotropically regulated in workers. A possible role for ecdysteroids in honey bee reproduction is discussed." @default.
- W2001158446 created "2016-06-24" @default.
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- W2001158446 date "2009-08-01" @default.
- W2001158446 modified "2023-10-01" @default.
- W2001158446 title "Regulation of hypopharyngeal gland activity and oogenesis in honey bee (Apis mellifera) workers" @default.
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- W2001158446 doi "https://doi.org/10.1016/j.jinsphys.2009.05.003" @default.
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