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MicroRNAs (miRNAs) are endogenous small non-coding RNAs which play a critical role in gene regulation in plants.Pinelliapedatisectais one of the most important herbs in traditional Chinese medicine, but there are no microRNAs ofPinelliapedatisectawere deposited in miRBase and the research of the related miRNA biological functions is still insufficient. To detectPinelliapedatisectamiRNAs and discover their expression difference withPinelliaternata    , we carried out a microarray profiling. A total of 101 miRNAs belonging to 22 miRNA families were detected both inPinelliapedatisectaandPinelliaternatarespectively, among them 21 miRNAs showed their differentially expression. GO (gene ontology) term enrichment analysis of the target genes of differential expression miRNAs reveal that these miRNAs mainly affect the reproduction, transcription factor activity and plant developmental process. To elucidate the target function of miRNAs, we constructed a degradome library from    Pinellia    pedatisecta leaf. The result showed that a total of 18 transcript were identified as targets of miRNAs and further analysis indicated that miR156 and miR529 may function together to repress SPL14.

Microarray and Degradome Sequencing Reveal MicroRNA Differential Expression Profiles and Their Targets in Pinellia pedatisecta