Honeybee Larval Corpora Allata: Their Fine Structure and Repressor Action

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Abstract
Comparisons are made of the fine structure of the corpora allata of queen and worker larvae 48 hours old. Differences found between these physiologically distinct types of allata are discussed in relation to the secretions: at this age the queen is secreting a repressor, whereas the worker is actively secreting juvenile hormone. The effect of transplanted repressive allata from queen larvae on the fine structure of the left colleterial glands of the female cockroach (Periplaneta americana) is described. The fine structure associated with protein synthesis in these cells was completely disrupted. An attempt is made to relate these observations to honeybee development.