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12 Cards in this Set
- Front
- Back
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Kopec
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Confirmed presence of hormones in insects using gypsy moth
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Bodenstein
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Transplanted moth legs moulted with the recipient
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Wigglesworth
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Rhodnius prolixus
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Wigglesworth experiment (regarding moulting)
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Remove head before critical point = no moult, blood of insect that's past crit point = moulting in decapitated insects, brain needed for moulting and corpora allata prevents moulting
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Fukuda
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Bombyx mori, brain and prothoracic gland needed for pupation
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Williams regarding cecropia
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H. cecropia, brain needed to drive PG, corpora allata makes "status quo" hormone
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Gibbs and Riddiford
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Whole animal bioassay on M. sexta, specific region of procerebral neurosecretory cells are putative source of PTTH
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Gilbert and Bollenbacher
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M. sexta, PTTH synthesized from 2 pairs in brain of larva, neurohemal organ (area of hormone release) in most insects is corpus cardiacum but Manduca neurosecretory axons from PTTH cells pass through cc and terminate in ca
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Fraenkel experiment
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Ligated larva before crit period = only anterior pupated. Inject moulting hormone into posterior = both ligated. Blowfly.
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Mirth, Riddiford, Truman
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Drosophila pupae. Enlarged PG = increased insulin signaling = metamorphosis at smaller size
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Wigglesworth experiment (regarding JH)
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Implant CA (source of JH) into last instar larva = supernumerary larva, parabiose last instar onto earlier instar = only larval characteristics after moult, application of JH results in formation of larval cuticle (otherwise adult cuticle)
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Williams Bombyx mori JH experiments
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Normally pupates after 5th instar, remove CA at 4th = small pupa/adult, remove CA then add CA of younger larva = extra instar and giant pupa/adult
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