stem apex的用法和樣例：
例句
- Calli were induced from immature leaves and stem segments of Minqin Chinese date,plant regeneration via organogenesis was obtained by rooting from shoot-tip.
以民勤小棗幼莖和幼葉為外植體，誘導出愈傷組織，用莖尖誘導生根獲得再生植株。
超過方面獨有創造，受著作權保護，侵犯商標權必究
- 現在熱點話題
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