Section Aigeiros is the most important section of Populus, and it playes significant economy role on forest production. In this paper, Populusxeuramericana'San Martino' and Populus deltoides 60/160xP.nigra 'chile' were used as experimental materials. Through observation and comparison, leaves and petioles sprouted from the cutting shoots cultured in water were selected as explants. Factors that affected plantlet regeneration of P.xeuramericana'San Martino' and Populus deltoides 60/160xP.nigra 'chile' were i...