Long non-coding RNAs(lnc RNAs), widely found in eukaryotes, are tentatively defined as a class of RNA transcripts, which are greater than 200 nt in length and have extremely low protein-coding ability or without protein-coding ability. The type and function diversity of lnc RNAs make them difficult to be understood. Especially, the knowledge about lnc RNAs in plants is still quite limited. In this review, the types of characterized lnc RNAs, the RNA polymerases involved in lnc RNAs transcription, the associ...