New or recently identified miRNAs

aConserved between A. thaliana and P. trichocarpa.bNumber of reads are from all libraries in the ASRP (http://asrp.cgrb.oregonstate.edu/db) and MPSS Plus (http://mpss.udel.edu/at/) databases. Reads for each locus encompass the defined miRNA/miRNA* sequence ±4 nts on each side. ASRP (MPSS Plus).cTop three predicted targets with a score of 3.5 or less are listed with their score in parentheses. Targets validated by 5′ RACE are in bold. Remaining number of targets predicted with a score of 3.5 or less are listed in square brackets (Table S1). Dashes indicate no predicted targets with a score of 3.5 or less.dTargets validated by Lu et al. [23].eTarget tested but failed in 5′RACE validation assays.fSeventeen nt MPSS Plus signature was extended 4 nts on the 3′ end.