ボルネオ産Dawsonia beccarii自然集団が雄花盤を生じるタイミングとその位置(アジア産蘇苔類の分類・生態ノート, 18)

概要

論文の詳細を見る
A total of 246 aerial shoots of Dawsonia beccarii were sampled from a single male pupulation (with around 1300 aerial shoots) at Kinabalu National Park (Sabah, Malaysia) and (1) length between soil surface and lowermost antheridial cap (for fertile shoots) or shoot apices (in sterile shoots), and (2) length between antheridial caps for shoots bearing more than two antheridial caps were measured. It became evident based on multiple comparisons test that (1) shoots produced antheridial caps earlier after emerging from ground surface tend to produce them more in number, (2) there was a tendency that shoots produced antheridial caps continuously, and (3) sterile shoot were tend to become longer than fertile shoots. These results suggested that fertile shoots invested more resources to sexual reproduction, while sterile shoots to vegetative growth. There might be a functional differentiation between sterile and fertile shoots in a single population even if they were connected by rhizoid bundles.