Neuropeptides affecting the transfer of juvenile hormones from males to females during mating in Spodoptera frugiperda.
In the polyandric moth, Spodopterafrugiperda, juvenile hormone (JH) is transferred from the male accessory reproductive glands (AG) to the female bursa copulatrix (BC) during copulation (see Hassanien et al., 2014). Here we used the RNA interference technique to study the role of allatoregulating neuropeptides in controlling the synthesis and transfer of JH during mating. Knockdown of S. frugiperda allatostatin C (Spofr-AS type C) in freshly emerged males leads to an accumulation of JH in the AG beyond that in the control and mating results in a higher transport of JH I and JH II into the female BC. Knockdown of S. frugiperda allatotropin 2 (Spofr-AT2) significantly reduces the amount of JH in the AG as well as its transfer into the female BC during copulation. Knockdown of S. frugiperda allatostatin A (Spofr-AS type A) and S. frugiperda allatotropin (Spofr-AT; Hassanien et al., 2014) only slightly affects the accumulation of JH in the AG and its transfer from the male to the female. We conclude that Spofr-AS type C and Spofr-AT2 act as true allatostatin and true allatotropin, respectively, on the synthesis of JH I and JH II in the male AG. Moreover, both peptides seem to control the synthesis of JH III in the corpora allata of adult males and its release into the hemolymph.
Animal Ecology I, University of Bayreuth, 95448 Bayreuth, Germany.
Intisar T E
IT
Hassanien
Animal Ecology I, University of Bayreuth, 95448 Bayreuth, Germany.
Manuela
M
Grötzner
Animal Ecology I, University of Bayreuth, 95448 Bayreuth, Germany.
Martina
M
Meyering-Vos
Animal Ecology I, University of Bayreuth, 95448 Bayreuth, Germany. Electronic address: Klaus.hoffmann@uni-bayreuth.de.
Klaus H
KH
Hoffmann
D000818:Animals; D002853:Chromatography, Liquid; D005260:Female; D055785:Gene Knockdown Techniques; D007301:Insect Hormones / Q000235:genetics* / Q000378:metabolism; D007605:Juvenile Hormones / Q000097:blood / Q000235:genetics / Q000378:metabolism; D008297:Male; D013058:Mass Spectrometry; D009479:Neuropeptides / Q000235:genetics* / Q000378:metabolism; D034622:RNA Interference; D012330:RNA, Double-Stranded / Q000378:metabolism; D012726:Sexual Behavior, Animal; D018411:Spodoptera / Q000235:genetics / Q000502:physiology*
D007301:Insect Hormones; D007605:Juvenile Hormones; D009479:Neuropeptides; D012330:RNA, Double-Stranded
Allatostatin; Allatotropin; Bursa copulatrix; Copulation; Juvenile hormone; Male accessory reproductive glands