DEVELOPMENT OF ZOOSPORES IN RALFSIA-LIKE THALLUS, WITH SPECIAL REFERENCE TO THE LIFE CYCLE OF THE SCYTOSIPHONALES
DEVELOPMENT OF ZOOSPORES IN RALFSIA-LIKE THALLUS, WITH SPECIAL REFERENCE TO THE LIFE CYCLE OF THE SCYTOSIPHONALES
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类藻类菌体中游动孢子的发育，特别是管管藻目的生命周期
DOI：
10.1016/b978-0-08-011841-3.50030-6
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发表时间：
1965
期刊：
影响因子：
--
通讯作者：
Y. Nakamura
中科院分区：
文献类型：
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作者：
Y. Nakamura
7 月下旬至 12 月期间，在北海道室兰潮间带，光滑、有些扁平的卵石或石头上通常会发现小型甲壳深棕色藻类的生长（图 1）。这种类似 Ralfsia 的叶状体通常在 10 月至 12 月成熟，据作者检查，仅产生单室孢子囊（图 2、3）。从这些单室孢子囊中释放出来的游动孢子并不像其他拉尔夫西亚物种那样主要发育成微小的薄壁圆盘，而是发芽成简单或密集分枝的匍匐丝状体（图4）。此外，它们通常发育成两种幼苗，细长的形式（5-6 N 宽）和更宽的形式（7-8 u 宽），这表明亲本植物由两种不同的实体组成。
Small crustaceous dark brown algae are commonly found growing on smooth, somewhat flattened pebbles or stones in the intertidal belt at Muroran, Hokkaido, from late July to December (Fig. 1). This Ralfsia-like thallus usually matures from October to December and, as far as the author could examine, produces only unilocular sporangia (Figs. 2, 3). The zoospores liberated from these unilocular sporangia do not develop primarily into minute parenchymatous discs as in other species of Ralfsia, but germinate into creeping filaments which are simply or densely branched (Fig. 4). In addition, they usually develop into two kinds of germlings, slender forms (5-6 N broad) and broader ones (7-8 u broad), suggesting that the parent plant consists of two different entities.