1Beruto A,Curir P. In vitro culture of tree peony through axillary bud-ding [M]. Netherlands : Springer,2007 :480 -496.
2Partanen C R. Cytological behaviour of plant tissues in vitro as a re-flection of potentialities in vivo. WHITE PR. Proc Int Conf Plant Tis-sue Culture[C]. Bericeley:Cuthan Publ CO, 1965:1 -9.
3Demoise C F,Partanen C R. Effects of subculturing and physicalcon-dition of mediumon the nuclear behavior of plant tissue culture[ J].Amer J Bot,1969,56 (2):147-152.
