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当培养基含有较低浓度ＢＡ时，柱型苹果‘舞姿’、短枝型‘金矮生’和普通型‘金冠’的嫩茎增殖都基本正常，当ＢＡ浓度较高时，柱型苹果品种嫩茎仍能保持正常状态，而短枝型和普通型品种受到强烈抑制。在较高浓度ＢＡ培养基中，短枝型和普通型品种的内源激素变幅很大，而且继代培养后期恢复很慢，相比之下，柱型品种内源激素变幅小，而且恢复快。初步分析，柱型苹果嫩茎增殖对高浓度ＢＡ具有强的忍耐能力，其原因与所含高水平的ＣＴＫ有密切关系。
When the culture medium contained BA at a lower concentration, the stems of the stems’ dance, spur ’dwarf’ and common type ’Golden Delicious’ proliferated basically normal. When the concentration of BA was higher, the columnar apple varieties Young stems can still maintain their normal state, while spur type and common type are strongly inhibited. In higher concentrations of BA medium, the endogenous hormones of short and common varieties varied greatly, and the recovery in the late subculture was slow. In contrast, Fast recovery. Preliminary analysis showed that the proliferation of columnar apple stems had strong tolerance to high concentration of BA, the reason is closely related to the high level of CTK.