Starch Gel and Tissue Culture:II. Synchronized Effects of Corn Starch Gel Medium on Rooting Induction of Malus Zumi and M26
淀粉凝胶与植物组织培养II.玉米淀粉凝胶培养基对苹果砧木组培生根诱导的同步化作用

Malus zumi and M26 dwarfing stocks for apple trees were cultured in agar medium and corn starch gel medium(CSM),respectively.The results showed that the CSM not only increased rooting rate in of the two species,but also had synchronized effests on rooting induction.For example,the rooting rate in CSM reached 85-98%,23-30% higher than that in agar medium,and the rooting differentiation was completed in about 2 to 3 days,which was also shorter than that in agar medium.HPLC analysis of free amino acids of M. zumi demonstrated that the CSM inhabited the increase of the content of Arg,Val,Phe,Leu,ORn,and stimulated further reduction of other free amino acids in rooting culture.