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アミアオサの形態形成


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Title: アミアオサの形態形成
Other Titles: Morphogenesis of Ulva reticulata Forsk. (Chlorophyta, Ulvales)
Authors: 右田, 清治 / 藤田, 雄二
Authors (alternative): Migita, Seiji / Fujita, Yuji
Issue Date: Nov-1984
Publisher: 長崎大学水産学部
Citation: 長崎大学水産学部研究報告, v.56, pp.1-6; 1984
Abstract: Ulva reticulata Forsk. shows broken networks produced by pores. According to previ-ous descriptions, this alga is also provided with microscopical teeth on marginal parts. However, these morphological details are obscure. The purpose of our present study is to clarify the morphogenesis of Ulva reticulata and we have conducted laboratory culature experiments using the materials collected from Okinawa Island. Cultures were generally carried out at 25℃, 3,000 lux, 12:12 LD, and employing PES medium. Fragments of thallus, excised to a piece of 1 cm long, grew well at 25℃. They reach-ed 2 cm in length and formed round pores after 4 days culture. After 12 days, further developed blades produced many pores and showed the same networks as the field materials. It was clearly observed that perforation of networks was due to the formation and discharge of gametes. On the other hand, parthenogenetic germlings of gametes also developed into net-like thalli after 2 months culture. The growth of the parthenogenetic germling was vigorous at 25℃, but it was suppressed at 10° and 15℃. In the cultures of 10° and 15℃, thalli had produced neither pores nor networks. Throughout the whole cultures in this study, microscopic teeth on marginal parts of thalli could not be observed.
URI: http://hdl.handle.net/10069/30392
ISSN: 05471427
Type: Departmental Bulletin Paper
Text Version: publisher
Appears in Collections:第56号

Citable URI : http://hdl.handle.net/10069/30392

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