Protocorm or Rhizome? The Morphology of Seed Germination in Cymbidium dayanum Reichb

原球體或根莖？鳳蘭種子發芽之形態研究

張正(Chen Chang) ； 陳盈君(Yin-Chun Chen) ； 嚴新富(Hsin-Fu Yen)

《Botanical Bulletin of Academia Sinica》 46卷1期 (2005/01) Pp. 71-74

https://doi.org/10.7016/BBAS.200501.0071

摘要

鳳蘭為蘭科蕙蘭屬附生性植物，將種子播種在試管內一個月後發芽，胚先膨大突破種皮形成原球體，在原球體的下半部形成吸收毛。接著原球體形成頂芽，發育成長條形，鞘葉在頂端形成，並產生側芽及鱗片葉。鳳蘭的種子發芽是先形成原球體，再過渡根莖構造，頂芽無向地性，具直接形成莖葉的能力。

關鍵字

鳳蘭 ； 向地性 ； 原球體 ； 根莖

並列摘要

Seeds of Cymbidium dayanum Reichb. were sown in vitro and germinated to produce protocorms one month later. Protocorms elongated, and the unicellular cell absorbing hairs were initiated at the base. The anterior of the protocorm produced the sheath leaf primordium. After two months, the protocorms grew, with the structure similar to that of rhizomes with nodes and lateral buds. The terminal buds spontaneously developed into shoots. According to the morphological pattern in vitro, we inferred that the seed germination of C. dayamum involved a fast transition from protocorm to plantlet by rhizome.

並列關鍵字

Cymbidium dayanum Reichb. ； Gravitropism ； Protocorm ； Rhizome