Certain subnetworks mediated by the small RNAs (sRNAs) highly accumulated in the root tips of rice. For both (A) and (B), the sRNAs are represented by blue nodes, and the targets by gray nodes. Notably, the target nodes in red color are the ones with expression patterns contrary to those of the regulating sRNAs, which are supported by microarray data. The target nodes with green outlines are the ones with potential biological functions in root development based on the literatures. The subnetworks were constructed by using Cytoscape .