Cellular metamorphosis: II. The larval labial gland duct and its prospective adult fates in the tobacco hornworm☆
[摘要] Thelarvallabialglandofthesphingidmoth,Manducasexta,producesaviscoussecretion,presumablyalubricant,facilitatingtheburrowingwhichprecedespupation.Duringmetamorphosis,theglandtransformsintoasalivaryorgan,producinganinvertase-richdigestivesecretion.Thesingle-celltypefoundintheductofthelarvalglandtransformsintothefourstructurallyandfunctionallydistinctcelltypesfoundinthefoursequentiallyarrangedsecretoryandconductiveregionsoftheadultsalivarygland.Surgicalexperimentswereperformedtostudytheprospectivefatesofdifferentpartsofthelarvalgland.Theglandswerebisectedandoneorbothfragmentswereleftinsitutoundergometamorphosis.Inaddition,fragmentsofthelarvalglandwereimplantedinpupalhostsandwentthroughmetamorphosisfreeoftheirpriorattachments.Thefourlinearlyarrayedadultregionsoriginatefromcorrespondinglypositionedareasinthelarvalduct.
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[效力级别] [学科分类] 生物科学（综合）
[关键词] [时效性]
