Study
Expression of amylase and glucose oxidase in the hypopharyngeal gland with an age-dependent role change of the worker honeybee
Ohashi, Kazuaki; Natori, Shunji; Kubo, Takeo
European Journal of Biochemistry, 1999
Enzyme production in the hypopharyngeal glands of worker honey bees was measured across the worker lifespan, tracking which enzymes appear as a bee moves from nursing to foraging and food processing.
- Studied in
- Apis mellifera
- Sample size
- workers sampled across age classes
Gland output switches with age and role. Young nurse bees produce brood-food proteins; older workers switch to carbohydrate-processing enzymes including alpha-glucosidase and glucose oxidase, the enzymes that convert nectar sucrose and generate hydrogen peroxide in honey.
What it means
The authors' reading, and ours. Where they differ, that difference is the point.
How the authors put it
The hypopharyngeal gland is reprogrammed as a worker changes role, matching enzyme output to the job the bee is currently doing.
How NatureHQ reads it
This is the mechanism underneath "bees make honey", and it is more interesting than the phrase suggests. Honey is not stored nectar. It is nectar that has been chemically altered — sucrose split into simpler sugars, and an antibacterial system created as a by-product — by enzymes a bee only starts producing at a particular age. The same gland makes brood food earlier in life, which is why a colony can reallocate labour without needing different castes.
- Enzyme expression measured in laboratory colonies; field colonies vary with forage and season.
- Establishes what the glands produce, not the complete chemistry of ripening honey.
- Age-related role change is flexible in real colonies and can reverse under stress.
What this study is used for on NatureHQ
One study can inform several subjects. Here is everywhere this one is cited.
Published by: Wiley journalsPublished in a Wiley journal.
doi.org/10.1046/j.1432-1327.1999.00696.x
This reference was resolved automatically against Crossref and OpenAlex on 2026-08-11.
NatureHQ summarises research in its own words and does not reproduce published text. Reviewed 2026-08-09.