A1 Vertaisarvioitu alkuperäisartikkeli tieteellisessä lehdessä
Effect of Juvenile Hormone on Resistance against Entomopathogenic Fungus Metarhizium robertsii Differs between Sexes
Tekijät: Rantala Markus J., Dubovskiy Ivan M., Pölkki Mari, Krama Tatjana, Contreras-Garduño Jorge, Krams, Indrikis A.
Kustantaja: MDPI
Julkaisuvuosi: 2020
Journal: Journal of Fungi
Tietokannassa oleva lehden nimi: JOURNAL OF FUNGI
Lehden akronyymi: J FUNGI
Artikkelin numero: ARTN 298
Vuosikerta: 6
Numero: 4
Sivujen määrä: 8
eISSN: 2309-608X
DOI: https://doi.org/10.3390/jof6040298
Verkko-osoite: https://doi.org/10.3390/jof6040298
Rinnakkaistallenteen osoite: https://research.utu.fi/converis/portal/detail/Publication/51289382
Juvenile hormone has been suggested to be a potential mediator in the trade-off between mating and insects' immunity. Studies on various insect taxons have found that juvenile hormone interferes with humoral and cellular immunity. Although this was shown experimentally, studies using highly virulent parasites or pathogens are lacking so far. In this study, we tested if juvenile hormone administration affected resistance against entomopathogenic fungi, Metarhizium robertsii, in the mealworm beetle, Tenebrio molitor. In previous studies with T. molitor, juvenile hormone has been found to reduce a major humoral immune effector-system (phenoloxidase) in both sexes and decrease the encapsulation response in males. Here, we found that juvenile hormone administration prolonged survival time after infection with M. robertsii in males but reduced survival time in females. This study indicates that the effects of juvenile hormone on insect immunity might be more complicated than previously considered. We also suggest that there might be a trade-off between specific and non-specific immunity since, in males, juvenile hormone enhances specific immunity but corrupts non-specific immunity. Our study highlights the importance of using real parasites and pathogens in immuno-ecological studies.
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