Abstract：
:Drosophila seminal fluid proteins elicit physiological and behavioral changes in the female after mating. For example, the seminal protein sex peptide (SP) causes females to lay more eggs, reduce receptivity to re-mating, consume more food and produce more concentrated excreta upon mating. It has been reported that SP indirectly increases food consumption as a result of its stimulation of egg production, but its role in producing more concentrated excreta in the mated female was reported to be independent of egg production. Additionally, it has been shown that SP's effect on food consumption persists for several days after mating, while it is unknown whether this is true for its effect on excretion. SP can have both transient and long-term effects on mated females; the latter occur because of the peptide's binding to, and slow release from, sperm in the female. Here we used timed measures of excretion by female flies that had mated to males mutant in SP or in its regulators, to test the duration of SP's effect on excretion. We found that SP's effect on excretion persists for at least ~1 week after mating, and that this persistence requires that SP bind to and be released from sperm. Although these binding/release requirements of SP are similar to those for increased egg production (and consequent increased food intake) following mating, we find that the long-term change in excretion phenotype is only partially dependent on the presence of eggs in the female. Our data indicate that a change in intestinal transit is part of the long-term post-mating response elicited by the gradual release of sperm-bound SP in the female after mating, even though it is not fully dependent on other long-term responses elicited by SP.
journal_name
J Insect Physioljournal_title
Journal of insect physiologyauthors
Apger-McGlaughon J,Wolfner MFdoi
10.1016/j.jinsphys.2013.07.001subject
Has Abstractpub_date
2013-10-01 00:00:00pages
1024-30issue
10eissn
0022-1910issn
1879-1611pii
S0022-1910(13)00153-4journal_volume
59pub_type
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