Principal Investigator: Maria Dolors Piulachs Principal Investigator: Maria Dolors Piulachs


Research lines Research lines

Our long term objective is to elucidate how the oogenesis in insects is regulated, considering the structural diversity of ovary types and their respective evolutionary history.

Two main types of ovaries can be distinguished in insects: the panoistic and the meroistic. The panoistic type is more generalized in phyllogenetically basal species, whereas the meroistic type predominates in distal insect groups. Our purpose is to understand the transition from panoistic to meroistic ovaries during evolution, and to reach this end objective is crucial to gather molecular information about the different ovarian types. Most of the studies on insect oogenesis published to date have been carried out using Drosophila melanogaster as model, a species with meroistic ovaries. Thus, we have based our project on an insect species with panoistic ovaries: the cockroach Blattella germanica. Our group has been recording a lot of information related with oogenesis and reproduction on this species, and during the last years our research was addressed to study those genes that determine oocyte polarization, and those that control follicular cell proliferation. Now we will study how the juvenile hormone and the ecdysone signal is transduced to determine oocyte capacitation and maturation.


Lab website: Insect Reproduction Lab

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Principal Investigator Principal Investigator

Current members Current members

Publications since 2011 Publications since 2011

Rubio, M.; Maestro, J.L., Piulachs, M.D.; Belles, X. (2018) Conserved association of Argonaute 1 and 2 proteins with miRNA and siRNA pathways throughout insect evolution, from cockroaches to flies. Biochimica et Biophysica Acta - Gene Regulatory Mechanisms. 1861(6):554-560 doi: 10.1016/j.bbagrm.2018.04.001

Harrison, M.C.; Jongepier, E.; Robertson, H.M.; Arning, N.; Bitard-Feildel, T.; Chao, H.; Childers, C.P.; Dinh, H.; Doddapaneni, H.; Dugan, S.; Gowin, J.; Greiner, C.; Han, Y.; Hu, H.; Hughes, D.S.T.; Huylmans, A.K.; Kemena, C.; Kremer, L.P.M.; Lee, S.L.; Lopez-Ezquerra, A.; Mallet, L.; Monroy-Kuhn, J.M.; Moser, A.; Murali, S.C.; Muzny, D.M.; Otani, S.; Piulachs, M.D.; Poelchau, M.; Qu, J.; Schaub, F.; Wada-Katsumata, A.; Worley, K.C.; Xie, Q.; Ylla, G.; Poulsen, M.; Gibbs, R.A.; Schal, C.; Richards, S.; Belles, X.; Korb, J.; Bornberg-Bauer, E. 2018. Hemimetabolous genomes reveal molecular basis of termite eusociality. Nature Ecology and Evolution. 2(3):557-566 doi: 10.1038/s41559-017-0459-1

Irles, P.; Ramos, S. and Piulachs, M.D. 2017. SPARC preserves follicular epithelium integrity in insect ovaries. Developmental Biology 422(2):105-114

Macedo, L.M.; Nunes, F.M.; Freitas, F.C..; Pires, C.V,.; Tanaka, E.D.; Martins, J.R.; Piulachs, M.D.; Cristino, A.S.; Pinheiro, D.G.; and Simões, Z.L. 2016.MicroRNA signatures characterizing caste-independent ovarian activity in queen and worker honeybees (Apis mellifera L.)Insect Molecular Biology 25(3):216-26.

Ongoing projects Ongoing projects

In the media In the media

21st March 2018: 

In a Cockroach Genome, ‘Little Mighty’ SecretsNew York Times, with comments of Xavier Bellés, principal investigator at IBE

Querida 'amiga' cucaracha: así nos protege el insecto más odiado, with comments of Dolors Piulachs, principal investigator at IBE

2014, August. "Nuevos descubrimientos sobre la fisiología de las cucarachas". Article about the paper "The cockroach Blattella germanica obtains nitrogen from uric acid through a metabolic pathway shared with its bacterial endosymbiont", with the participation of Maria-Dolors Piulachs and Xavier Bellés.