Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 2-15 Natsushima-cho, Yokosuka 237-0061, Japan Department of Astronomy and Earth Sciences, Tokyo Gakugei University, Koganei, Tokyo 184-8501, Japan.
Environ Microbiol Rep. 2011 Feb;3(1):86-90. doi: 10.1111/j.1758-2229.2010.00191.x.
The mechanisms of the extensive distribution of radiolarian-affiliated sequences from clone libraries of marine picoeukaryotes from deeper water remain poorly understood. Here, we describe an event that could explain this phenomenon. A polycystine radiolarian species, Cypassis irregularis Nigrini, released a large number of pico-size cells under culture conditions. The diameters of the cells averaged ∼3 µm and the 18S rDNA sequences fell within those of typical radiolarian families. This finding suggests that the radiolarian sequences found in the picoeukaryote size fraction from deep water are from swarmers or gametes released for reproduction. Thus, the deep ocean is expected to aid in the widespread dispersal of the genetic material of eukaryotes.
放射虫相关序列在海洋微微型真核生物克隆文库中广泛分布的机制仍不清楚。在这里，我们描述了一个可能解释这一现象的事件。一种多房放射虫物种，Cypassis irregularis Nigrini，在培养条件下释放了大量的小型细胞。这些细胞的直径平均约为 3 µm，其 18S rDNA 序列属于典型的放射虫科。这一发现表明，深海微微型真核生物大小部分中发现的放射虫序列来自于进行繁殖的游孢子或配子。因此，深海有助于真核生物遗传物质的广泛传播。
