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在西瓜和甜瓜的组织培养中，子叶和真叶外植体切块的形态下端部总是首先大量地发生愈伤组织或分化出器官，而切块的形态上端部很少或几乎不发生愈伤组织或器官，愈近胚轴端的外植体切块，这种现象愈明显。器官发生类型国培养基中生长调节剂的种类和含量而表现出很大差异。
In the tissue culture of watermelon and melon, the lower end of the cotyledon and the true leaf explant cut-shape always generate a large amount of callus or differentiate into organs at first, and the upper end of the cut piece has little or no callus Or organs, the more proximal explant explant cut, the more obvious this phenomenon. There are large differences in the types and amounts of growth regulators in the organogenesis-type media.