Asepsis leaves of Photinia frasery were employed to study callus tissue culture and establishment of suspension cell lines.The results showed that the appropriate medium for callus induction is MS+6-BA 0.5 mg/L +2,4-D 1.0 mg/L+NAA 0.1 mg/L;Inductivity is up to 97%;And the medium of multiplication is MS+6-BA 1.0 mg/L+NAA 0.1 mg/L.Orthogonal tests were performed to find out the effects of different adsorbents,anti-oxidants and other factors on callus browning.The medium for anti-browning is MS+6-BA 1.0 mg/L +...