 This study used solexasequencing to identify and characterize microRNAs, myrnas, in soybean plants undergoing water deficit and rust stress. The authors found 256 myrnas, including 24 families of novel myrnas, six families of conserved myrnas, and 22 families previously reported in soybean. They also observed the presence of several isomia RNAs during their analyses. Furthermore, they validated the expression patterns of these myrnas by performing quantitative reverse transcriptase polymerase chain reaction, RTQPCR. Their results suggest that myrnas may be involved in the processes of water deficit and rust stress responses in soybean. This article was authored by Nacimento Leandresi, Abdel Norocadovi, Mussolini-Gimores, Francis Marci, and others.