TITLE	Protocorm or rhizome? The morphology of seed germination in Cymbidium dayanum Reichb.
AUTHOR	Chen CHANG* Department of Botany, National Museum of Natural Science, Taichung, Taiwan 404, Republic of China Ying Chun CHEN Department of Botany, National Museum of Natural Science, Taichung, Taiwan 404, Republic of China Hsin Fu YEN Department of Botany, National Museum of Natural Science, Taichung, Taiwan 404, Republic of China
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ABSTRACT	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. dayanum involved a fast transition from protocorm to plantlet by rhizome.
KEYWORD	Cymbidium dayanum Reichb.; Gravitropism; Protocorm; Rhizome;
ARTICLE INFO	Botanical Bulletin of Academia Sinica, Volume 46 Number 1 January 2005, page 71-74, 4 pages
PUBLISHER	Institute of Plant and Microbial Biology, Academia Sinica, Taipei, Taiwan, Republic of China