3GALLEGO P,HITA O,VILLALOBOS N,et al. Somatic embryogenesis and plant regeneration in Medicago arborea L [J]. In Vitro Cell Dev Biol Plant ,2001,37(2) :199 -209.
4ZHOU J Y,LIAO H,LI L P,et al. Determination of emodin and chrysophanol contents in callus of Cassia tora L. leaf[J]. Agricultural Science & Technology,20OS,9(2) :60 -62.
