Effects of two seminal fluid transcripts on post‐mating behavior in the simultaneously hermaphroditic flatworm Macrostomum lignano

Weber M, Patlar B, Ramm S (Accepted)
Journal of Evolutionary Biology: jeb.13606.

Zeitschriftenaufsatz | Angenommen | Englisch
 
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Abstract / Bemerkung
The seminal fluid proteins (SFPs) transferred to mating partners along with sperm often play crucial roles in mediating post-mating sexual selection. One way in which sperm donors can maximize their own reproductive success is by modifying the partners' (sperm recipient's) post-copulatory behavior to prevent or delay re-mating, thereby decreasing the likelihood or intensity of sperm competition. Here, we adopted a quantitative genetic approach combining gene expression and behavioral data to identify candidates that could mediate such a response in the simultaneously hermaphroditic flatworm Macrostomum lignano. We identified two putative SFPs - Mlig-pro46 and Mlig-pro63 - linked to both mating frequency and 'suck' frequency, a distinctive behavior, in which, upon ejaculate receipt, the worm places its pharynx over its female genital opening and apparently attempts to remove the received ejaculate. We, therefore, performed a manipulative experiment using RNA interference-induced knockdown to ask how the loss of Mlig-pro46 and Mlig-pro63 expression, singly and in combination, affects mating frequency, partner suck propensity and sperm competitive ability. None of the knock-down treatments impacted strongly on the mating frequency or sperm competitive ability, but knock-down of Mlig-pro63 resulted in a significantly decreased 'suck' propensity of mating partners. This suggests that Mlig-pro63 may normally act as a cue in the ejaculate to trigger recipient suck behavior, and - given that other proteins in the ejaculate have the opposite effect - could be one component of an on-going arms race between donors and recipients over the control of ejaculate fate. However, the adaptive significance of Mlig-pro46 and Mlig-pro63 from a donor perspective remains enigmatic. This article is protected by copyright. All rights reserved.
Erscheinungsjahr
2020
Zeitschriftentitel
Journal of Evolutionary Biology
Art.-Nr.
jeb.13606
ISSN
1010-061X
eISSN
1420-9101
Page URI
https://pub.uni-bielefeld.de/record/2941513

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Weber M, Patlar B, Ramm S. Effects of two seminal fluid transcripts on post‐mating behavior in the simultaneously hermaphroditic flatworm Macrostomum lignano. Journal of Evolutionary Biology. Accepted: jeb.13606.
Weber, M., Patlar, B., & Ramm, S. (Accepted). Effects of two seminal fluid transcripts on post‐mating behavior in the simultaneously hermaphroditic flatworm Macrostomum lignano. Journal of Evolutionary Biology, jeb.13606. doi:10.1111/jeb.13606
Weber, M., Patlar, B., and Ramm, S. (Accepted). Effects of two seminal fluid transcripts on post‐mating behavior in the simultaneously hermaphroditic flatworm Macrostomum lignano. Journal of Evolutionary Biology:jeb.13606.
Weber, M., Patlar, B., & Ramm, S., Accepted. Effects of two seminal fluid transcripts on post‐mating behavior in the simultaneously hermaphroditic flatworm Macrostomum lignano. Journal of Evolutionary Biology, : jeb.13606.
M. Weber, B. Patlar, and S. Ramm, “Effects of two seminal fluid transcripts on post‐mating behavior in the simultaneously hermaphroditic flatworm Macrostomum lignano”, Journal of Evolutionary Biology, Accepted, : jeb.13606.
Weber, M., Patlar, B., Ramm, S.: Effects of two seminal fluid transcripts on post‐mating behavior in the simultaneously hermaphroditic flatworm Macrostomum lignano. Journal of Evolutionary Biology. : jeb.13606 (Accepted).
Weber, Michael, Patlar, Bahar, and Ramm, Steven. “Effects of two seminal fluid transcripts on post‐mating behavior in the simultaneously hermaphroditic flatworm Macrostomum lignano”. Journal of Evolutionary Biology (Accepted): jeb.13606.

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PMID: 32064699
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bioRxiv: 10.1101/734301

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