【摘 要】
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DNA methylation is accomplished in animals by 2 classes of enzymes known as DNA methyltransferases,DNMT3 and DNMT1,which perform de novo methylation and mainten
【机 构】
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Department of Entomology, University of Georgia, Griffin, Georgia, USA
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DNA methylation is accomplished in animals by 2 classes of enzymes known as DNA methyltransferases,DNMT3 and DNMT1,which perform de novo methylation and maintenance methylation,respectively.Several studies of hymenopteran eusocial insects suggest that DNA methylation is capable of influencing developmental plasticity.However,fundamental questions remain about the patteing of DNA methylation during the course of insect development.In this study,we performed quantitative real-time PCR (qPCR) on transcripts from the single-copy orthologs ofDNMT 1 and DNMT3 in the red imported fire ant,Solenopsis invicta.In particular,we assessed the expression of S.invicta Dnmt1 and Dnmt3 RNA during 7 stages of worker development,among behaviorally distinct adults,and among male and female gonads.Dnmt3 was most highly expressed during embryonic development,whereas Dnmt1 was similarly expressed throughout the course of development.Moreover,Dnmt1 and Dnmt3 were highly expressed in testes and ovaries.Neither Dnmt was significantly differentially expressed among heads of behaviorally distinct adult castes.Our results support the hypothesis that extensive patteing of DNA methylation occurs during gametogenesis and embryogenesis in the insect order Hymenoptera.
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