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Tobacco mosaic virus (TMV) possesses an upstream pseudoknotted domain (UPD), which is important for replication. After substituting the UPD with an internal poly(A) tract (43 nt), a mutant TMV-43A was constructed. TMV-43A replicated slower than TMV and induced a non-lethal mosaic symptom in Nicotiana benthamiana. In this study, deep sequencing was performed to detect the differences of small RNA profiles...
We first constructed small RNA libraries of TMV- and TMV-43A-infected N. benthamiana for high throughput sequencing. A total number of 181 novel microRNAs (miRNAs) were identified through an improved miRNAs analysis pipeline. We were able to identify consistent miRNA expression changes induced in TMV and TMV-43A-infected plants, as well as differences associated with the UPD substitution in the TMV-43A...
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