CCCH zinc finger proteins containing the typical motif of three cysteines and one histidine residues serve regulatory functions at all stages of mRNA metabolism.In plant, CCCH type zinc finger proteins comprise of a large gene family represented by 68 members in Arabidopsis, 67 in rice.They have been known to play diverse roles in the developmental processes and environmental response.To date, no study has been presented for the model tree species Populus.