Abstract
Gene silencing using siRNA has been examined in the industrially-important fungus, Aspergillus niger. Protoplasts of an A. niger strain containing a single genomic copy of the Escherichia coli uidA gene, encoding beta-glucuronidase (GUS), under control of the A. niger glaA promoter at the same genomic locus, were exposed to siRNA targeted against the uidA gene. Down-regulation of uidA mRNA and GUS activity by siRNA was observed in mycelia that developed from the protoplasts. The down-regulation was transient and was not carried over to conidiation. We concluded that gene silencing by siRNA provides a relatively quick method for analysis of gene function in A. niger.
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