Morphological and molecular characterizations of the Gregarina sp. (Apicomplexa: Protozoa) parasitizing on Phaedon brassicae (Coleoptera: Chrysomelidae)
2014
Abstract A gregarine parasite (Eugregarinida: Gregarinidae) was observed in the population of daikon leaf beetle, Phaedon brassicae Baly, (Coleoptera: Chrysomelidae) in Korea. Gregarines are well known species-specific parasites of various Arthropoda. This Gregarina sp. also confirmed a species-specific parasite in P. brassicae . Based on 1.727 kb of 18S rDNA sequence (FJ481523), this gregarine species was grouped in eugregarine and a 5.258 kb of full length rDNA replicon was cloned (JF412715). We also observed interaction of trophozoite or gamonto of gregarine and epithelium of a host midgut using a light microscope and a scanning electron microscope. Although the developmental period of the infected host is delayed half a day in every larval stage, there was no significant difference in the developmental period of P. brassicae whether Gregarina sp. was infected or not. Gregarina sp. was a kind of facultative parasite from P. brassicae . This is the first report of a gregarine parasite in P. brassicae .
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