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.
再生植株叶片气孔大小和气孔保卫细胞内叶绿体数目可以作为从再生植株中早期鉴别四倍体植株的可靠指标。
The stoma size and chloroplast number in guard cells could be regarded as the reliable indicators of ploidy levels to identify seedlings in the early stage.
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