Hormonal Control of the Division of Labor in Adult Honeybees (Apis mellifera L.) : I. Effect of Methoprene on Corpora Allata and Hypopharyngeal Gland, and Its &amp;alpha;-Glucosidase Activity

Sasagawa, Hiromi; Sasaki, Masami; Okada, Ichiji

doi:10.1303/aez.24.66

Cited by 63 publications

(48 citation statements)

References 20 publications

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“…We found this concentration to maximize the expected physiological effect while minimizing the JHa exposure (see electronic supplementary material for details). This dose was not found to increase mortality during the duration of the experiments and is well within the range used in previous studies of insects, including social insects [25][26][27][28][29].…”

Section: Methodssupporting

confidence: 78%

Pleiotropic effects of juvenile hormone in ant queens and the escape from the reproduction–immunocompetence trade-off

2016

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The ubiquitous trade-off between survival and costly reproduction is one of the most fundamental constraints governing life-history evolution. In numerous animals, gonadotropic hormones antagonistically suppressing immunocompetence cause this trade-off. The queens of many social insects defy the reproduction-survival trade-off, achieving both an extraordinarily long life and high reproductive output, but how they achieve this is unknown. Here we show experimentally, by integrating quantification of gene expression, physiology and behaviour, that the long-lived queens of the ant Lasius niger have escaped the reproduction-immunocompetence trade-off by decoupling the effects of a key endocrine regulator of fertility and immunocompetence in solitary insects, juvenile hormone (JH). This modification of the regulatory architecture enables queens to sustain a high reproductive output without elevated JH titres and suppressed immunocompetence, providing an escape from the reproduction-immunocompetence trade-off that may contribute to the extraordinary lifespan of many social insect queens.

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Section: Methodssupporting

confidence: 78%

Pleiotropic effects of juvenile hormone in ant queens and the escape from the reproduction–immunocompetence trade-off

2016

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“…More electron dense secretion is found around the end apparatus. Probably this is the enzymerich secretion, which follows the production of the royal jelly (Sasagawa et al, 1989).…”

Section: Age-dependent Ultrastructurementioning

confidence: 99%

Age-dependent morphology and ultrastructure of the hypopharyngeal gland of Apis mellifera workers (Hymenoptera, Apidae)

2005

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-The main secretory products of the hypopharyngeal gland are royal jelly compounds, as well as other substances such as α-glucosidase. Our study of the morphology and ultrastructure of this gland in relation to worker's age clearly shows a secretory cycle within the cells, although production of secretion is asynchroneous between different cells within an acinus. Secretory vesicles appear already in 3 day old bees, while peak production is around 6 days. Thereafter, the volume of the acini as well as the number of secretory vesicles decrease and no vesicles are visible after 3 weeks of age. Foragers display degenerative structures in their cells. The hypopharyngeal gland cells of winter bees contain large numbers of secretory vesicles, that are probably stored until spring. exocrine gland / hypopharyngeal gland / morphology / ultrastructure

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“…Low titers are associated with behavior in the nest such as nursing during the first 1-3 weeks of adult life, whereas a higher titer at ~ 3 weeks of age accompanies foraging. Treatment with juvenile hormone and juvenile hormone analogs induces precocious foraging (Jaycox et al 1974;Jaycox 1976;Robinson 1985Robinson , 1987Sasagawa et al 1989).…”

Section: Development In Honey Bees and Its Endocrine Controlmentioning

confidence: 99%

Behavioral development in the honey bee: toward the study of learning under natural conditions.

Fahrbach¹,

Robinson²

1995

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Hormonal Control of the Division of Labor in Adult Honeybees (Apis mellifera L.) : I. Effect of Methoprene on Corpora Allata and Hypopharyngeal Gland, and Its α-Glucosidase Activity

Cited by 63 publications

References 20 publications

Pleiotropic effects of juvenile hormone in ant queens and the escape from the reproduction–immunocompetence trade-off

Pleiotropic effects of juvenile hormone in ant queens and the escape from the reproduction–immunocompetence trade-off

Age-dependent morphology and ultrastructure of the hypopharyngeal gland of Apis mellifera workers (Hymenoptera, Apidae)

Behavioral development in the honey bee: toward the study of learning under natural conditions.

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