Abstract
In plants, transgenes are generally more sensitive against RNA silencing than endogenes are. In this study, we generated a transgene that structurally mimicks an endogene. It is composed of endogenous promoter, 5′-UTR, introns, 3′-UTR and terminator elements. Our data revealed that, in contrast to a conventional transgene, an endogene-resembling transgene was more stably expressed and poorly processed into small RNAs. In addition, although both constructs triggered methylation of homologous DNA sequences at similar levels, the endogene-resembling transgene exhibited significantly delayed onset of local and systemic silencing.
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