So lower POX and SOD activity, lower contents of soluble protein and amino acid in Actinidia calluses were related to the diffculties in their protoplast culture.

• 因此较低水平的POX、SOD活性以及可溶性蛋白质和氨基酸含量是两种猕猴桃子叶愈伤组织原生质体分裂率低和玉米幼叶难以培养成功的影响因子。