Differences in haemolymph proteins in relation to diapause and wing dimorphism inPyrrhocoris apterus (L.) (Heteroptera: Pyrrhocoridae) |
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Authors: | R Socha J Šula |
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Institution: | (1) Institute of Entomology, Academy of Sciences, Branišovská 31, 370 05 České Budějovice, Czech Republic |
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Abstract: | Three different cultures of dimorphic bug,Pyrrhocoris apterus, were analyzed concerning diapause and its relation to wing morph pattern. The proportion of macropterous bugs was considerably
higher (36%) in the Mediterranean culture from Israel than that (1.3%) in the temperate culture from the Czech Republic. The
macropterous morph- and brachypterous morphrelated types of reproduction arrest, differing by the length of pre-oviposition
period, were distinguished in cultures analyzed. The reproduction arrest with an average pre-oviposition period of 38.2 days
in Mediterranean macropters and 18.5 days in macropters from selected macropterous strain, was found to be typical for macropterous
morph. Two different photoperiodic conditions induced macropterous morph-related reproduction arrest, the long-day (18 h light-6
h dark) photoperiod in macropterous strain macropters and the short-day (12 h light-12 h dark) photoperiod in Mediterranean
macropters. The brachypterous morph-related reproduction arrest, characterized by pre-oviposition period longer than 90 days,
occurred predominantly in diapausing brachypterous bugs. While the hibernal diapause of brachypterous bugs was characterized
by a very high level of the 78- and 82-kDa proteins in haemolymph, their content in haemolymph of macropters during macropterous
morph-related reproduction arrest was almost as low as in the reproductive adults. The variation of reproduction arrest in
relation to wing dimorphism represents an important feature in the life strategy ofP. apterus. |
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Keywords: | Haemolymph proteins Reproduction arrest Diapause Wing dimorphism Firebug Pyrrhocoris |
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