以叶片为外植体，建立了同源四倍体兰考泡桐和白花泡桐体外植株再生系统。
The system of vitro plantlet regeneration from the leaves of tetraploids of Paulownia elongate and Paulownia fortunei was established.
通过培养条件的优化，使烟草合子在体外通过器官发生途径与胚胎发生途径两种方式再生可育植株，从而创建了烟草合子的体外胚胎发生系统。
As a result, an in vitro zygotic embryogenesis system was build up, in which single tobacco zygotes could develop into fertile plants via embryogenesis or organogenesis under optimal condition.
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