胚胎发生的

Open lesion occur in early stage and are called spina bifida aperta or myelomeningocele.

开柱裂发生在胚胎发育的早期，又叫髓膜膨出。

The factors which influenced somatic embryogenesis and plantlet regeneration in Picea meyeri Rehd. et Wils. were studied in order to establish a high frequency embryogenetic system.

摘要为建立白杄体细胞胚胎发生及其植株再生的高频率实系统，对聚乙二醇及干化处理的影响进行了系统研究。