DEVELOPMENT OF EYE COLORS IN DROSOPHILA: PRODUCTION OFv+HORMONE BY FAT BODIES

Autor:	Edward L. Tatum, George Wells Beadle, C. W. Clancy
Rok vydání:	1939
Předmět:	medicine.medical_specialty Malpighian tubule system biology Period (gene) fungi Puparium formation biology.organism_classification Eye pigmentation Fat bodies Endocrinology Internal medicine medicine General Agricultural and Biological Sciences Drosophila Normal sequence Hormone
Zdroj:	The Biological Bulletin. 77:407-414
ISSN:	1939-8697 0006-3185
DOI:	10.2307/1537650
Popis:	Under normal genetic and environmental conditions fat-body cells produce v+ hormone after the time of puparium formation but not before. Attempts to induce hormone production by fat-body tissue before puparium formation were unsuccessful. Since it is shown that larval fat bodies of mature superfemale larvae contain v+ hormone, however, it is clear that the normal sequence of puparium formation and hormone production is not a necessary and invariable one.Active solutions of v+ hormone are readily obtained by extracting prepupal fat bodies over practically the entire period of prepupal development.It is shown that the so-called "starvation effect" on eye pigmentation involves a modification of genetically vermilion fat body cells such that they produce v+ hormone, whereas normally they are unable to do so. It is possible but not definitely established that a somewhat similar modification is brought about in cells of the Malpighian tubes by semistarvation of larvae.
Databáze:	OpenAIRE
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