Artículo

Slodowicz, M.; Ceriani-Nakamurakare, E.; Carmarán, C.; González-Audino, P. "Sex pheromone component produced by microbial associates of the forest pest Megaplatypus mutatus" (2019) Entomologia Experimentalis et Applicata
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Abstract:

Megaplatypus mutatus (Chapuis) (Coleoptera: Platypodidae) is an ambrosia beetle native to South America that causes economic loss and was recently introduced to Italy, where it attacks and damages live poplar trees. Sulcatol and sulcatone are male-produced pheromone components involved in the mating process of M. mutatus. Their relative proportions are highly variable among insects, although the temporal pattern shows that initially only sulcatol is present, and sulcatone increases with time, until they are finally both depleted. Sulcatol and sulcatone may be produced de novo by the beetles, they may be produced by fungi, or both pathways may contribute to their production. Sulcatol is stored in the males’ hindgut but sulcatone is only present in emissions, so there is an oxidation process to transform the alcohol to the ketone before or during pheromone release. It is our hypothesis that fungi associated with M. mutatus are responsible for this process. In this work, we studied a possible contribution of associated microorganisms in the conversion of sulcatol into sulcatone and its consequent role in the temporal release pattern of these sex pheromone components observed in male insects. Moreover, we inhibited the postulated enzymes involved in this pheromone conversion process – 3-hydroxy-3-methyl-glutatyl-CoA reductase (HMGR) and P450 enzymes of a fungal strain – and added an antibiotic and a fungicide to the homogenate during sulcatol-sulcatone conversion. Among the fungal species, particular interest was given to Graphium basitruncatum (Matsush.) Seifert & Okada (Microascales), as it is present in male but not in female exoskeletons and in insect gallery samples, suggesting a possible different role in pherome production, as the male is the pheromone-producing sex. Several isolated strains were able to convert sulcatol to sulcatone, whereas the fungus G. basitruncatum showed the highest production of this ketone. Additionally, inhibition of P450 enzymes and HMGR from G. basitruncatum on this alcohol-ketone conversion demonstrated that HMGR is involved in sulcatone generation using sulcatol as precursor, and that P450 enzymes are not. Finally, sulcatone production diminished significantly in homogenized tissues of male and female M. mutatus following addition of an antibiotic and a fungicide. The results suggest that fungi associated with M. mutatus are involved in pheromone production. © 2019 The Netherlands Entomological Society

Registro:

Documento: Artículo
Título:Sex pheromone component produced by microbial associates of the forest pest Megaplatypus mutatus
Autor:Slodowicz, M.; Ceriani-Nakamurakare, E.; Carmarán, C.; González-Audino, P.
Filiación:Centro de Investigaciones de Plagas e Insecticidas, J.B. de La Salle 4397 (B1603ALO), Villa Martelli, Buenos Aires, Argentina
Depto. Biodiversidad y Biología Experimental, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Av. Int. Güiraldes 2620, Buenos Aires, C1428EHA, Argentina
Palabras clave:ambrosia beetle; Coleoptera; Graphium basitruncatum; Platypodidae; poplar tree; sulcatol; sulcatone
Año:2019
DOI: http://dx.doi.org/10.1111/eea.12744
Título revista:Entomologia Experimentalis et Applicata
Título revista abreviado:Entomol. Exp. Appl.
ISSN:00138703
CODEN:ETEAA
Registro:http://digital.bl.fcen.uba.ar/collection/paper/document/paper_00138703_v_n_p_Slodowicz

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Citas:

---------- APA ----------
Slodowicz, M., Ceriani-Nakamurakare, E., Carmarán, C. & González-Audino, P. (2019) . Sex pheromone component produced by microbial associates of the forest pest Megaplatypus mutatus. Entomologia Experimentalis et Applicata.
http://dx.doi.org/10.1111/eea.12744
---------- CHICAGO ----------
Slodowicz, M., Ceriani-Nakamurakare, E., Carmarán, C., González-Audino, P. "Sex pheromone component produced by microbial associates of the forest pest Megaplatypus mutatus" . Entomologia Experimentalis et Applicata (2019).
http://dx.doi.org/10.1111/eea.12744
---------- MLA ----------
Slodowicz, M., Ceriani-Nakamurakare, E., Carmarán, C., González-Audino, P. "Sex pheromone component produced by microbial associates of the forest pest Megaplatypus mutatus" . Entomologia Experimentalis et Applicata, 2019.
http://dx.doi.org/10.1111/eea.12744
---------- VANCOUVER ----------
Slodowicz, M., Ceriani-Nakamurakare, E., Carmarán, C., González-Audino, P. Sex pheromone component produced by microbial associates of the forest pest Megaplatypus mutatus. Entomol. Exp. Appl. 2019.
http://dx.doi.org/10.1111/eea.12744