金狗毛蕨之成熟度指標

Indicators of the Maturity of Cibotium barometz (L.) J. Sm. (Dicksoniaceae, Pteridophyta)

李沛軒(Pei-Hsuan Lee) ； 張藝翰(Yi-Han Chang) ； 黃曜謀(Yao-Moan Huang)

《元培學報》 17期 (2010/12) Pp. 43-52

https://doi.org/10.30171/JYUST.201012.0004

摘要

金狗毛蕨爲台彎大形稀有之原生蕨類，本研究比較不同的形態介量，評估對植株成熟度與孕性葉預測之指標性。就植株成熟度而言，由於成熟植株之莖幹顯著地大於未成熟植株之莖幹直徑，且兩者重疊度低，對於植株成熟度的指標比其它形態介量，如：葉片數、葉長、葉身長、葉身寬、葉形（葉身長／葉身寬），更具預測性。從葉形介量（葉身長／葉身寬）可測知成熟植株之葉子較爲長橢圓及／或狹長狀。儘管葉長、葉身長或葉身寬等形態介量，在非孕性葉與孕性葉之間達到極顯著差異，然而具有高度重疊度，並不適合作爲預測葉片孕性之指標。

關鍵字

金狗毛蕨 ； 蚌殼蕨科 ； 蕨類植物 ； 孕性 ； 成熟度

並列摘要

Cibotium barometz is a large, rare fern native to Taiwan. This study evaluated the appropriate indicators of plant maturity and frond fertility by various morphological parameters. The caudex diameter is a better parameter to express the plant mature stage than other parameters, such as frond number, frond length, blade length, blade width, and frond shape (blade length! blade width) based on its significant difference and lower overlap degree between mature and immature plants, The leaf shape, which was measured by ”blade length/ blade width”, was more oblong and/or slender when the plant matured. Despite frond morphological parameters, such as frond length, blade length and blade width were significantly different between the fertile and sterile fronds. They could not represent appropriate indicators to evaluate the leaf fertility due to their high degree of overlapping.

並列關鍵字

Cibotiun barometz ； Dicksoniaceae ； Fern ； Fertility ； Maturity