The phylogenetic tree file was produced using ClustalW (http://www.ebi.ac.uk/clustalW/). The GenBank accession numbers of the amino acid sequences used are: CmeIF_iso_4E (JQ904591, Chrysanthemum morifolium), LseIF_iso_4E (AAP86603.1, Lactuca sativa), SleIF_iso_4E (NP_001234772.1, Solanum lycopersicum), PseIF_iso_4E (BAK53449.1, Pisum sativum), NteIF_iso_4E (AAU06579.1, Nicotiana tabacum), PveIF_iso_4E (ABU54807.1, Phaseolus vulgaris), CpeIF_iso_4E (ACM18197.1, Carica papaya), CseIF_iso_4E (ABY56102.1, Cucumis sativus), CmeIF4E (JQ904591, Chrysanthemum morifolium), AteIF4E (NP_193538.1, Arabidopsis thaliana), CaeIF4E (AAN74644.1, Cayenne pepper), CpeIF4E (ACN38307.1, Carica papaya), HveIF4E (CAR92170.2, Hordeum vulgare), LseIF4E (AAP86602.1, Lactuca sativa), NteIF4E (DK22107.1, Nicotiana tabacum), SleIF4E (AAV88610.1, Solanum lycopersicum), PseIF4E (ABG35119.1, Pisum sativum) and ZmeIF4E (ACG34414.1, Zea mays).