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The three species can be identified morphologically, however, some specimens have intermediate morphologies among them. G. firma has terminal branches without or with some furcations and blunt apices, first-order of branches always constricted at the bases; G. changii has many branches, inflated at the middle and tapering toward apices, all branches abruptly constricted at the bases; G. salicornia has cylindrical to compressed branches with regular or irregular arrangement of branches, constricted or continuous and intermediate species has branches inflated, tapering to apices, with and without constriction at bases. To elucidate the species status of Gracilaria species, we examined their photosynthetic and respiratory responses to irradiance and temperature by Oxygen Analyzer Series 3600. Net photosynthetic rate in species of Gracilaria from Trat Province was dependent on temperature. It increased with an increase in temperature from 25-35℃, while the rate decreased at 40℃. 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Morphological and photosynthetic studies on Gracilarian species from Trat Province, eastern Thailand
https://doi.org/10.15083/00040779
https://doi.org/10.15083/00040779cc7d5854-bc58-44fd-84d8-be93de1f6451
名前 / ファイル | ライセンス | アクション |
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KJ00004354610.pdf (2.3 MB)
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Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||
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公開日 | 2007-04-05 | |||||
タイトル | ||||||
タイトル | Morphological and photosynthetic studies on Gracilarian species from Trat Province, eastern Thailand | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
主題 | Gracilaria | |||||
主題Scheme | Other | |||||
キーワード | ||||||
主題 | photosynthesis | |||||
主題Scheme | Other | |||||
キーワード | ||||||
主題 | morphology irradiance | |||||
主題Scheme | Other | |||||
キーワード | ||||||
主題 | temperature | |||||
主題Scheme | Other | |||||
キーワード | ||||||
主題 | Thailand | |||||
主題Scheme | Other | |||||
資源タイプ | ||||||
資源 | http://purl.org/coar/resource_type/c_6501 | |||||
タイプ | departmental bulletin paper | |||||
ID登録 | ||||||
ID登録 | 10.15083/00040779 | |||||
ID登録タイプ | JaLC | |||||
著者 |
Phooprong, Sukanya
× Phooprong, Sukanya× Ogawa, Hisao× Nanba, Nobuyoshi |
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著者所属 | ||||||
著者所属 | School of Fisheries Science, Kitasato University | |||||
抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | Morphological and photosynthetic characteristics of the three Thai species of Gracilaria, G. changii, G. firma and G. salicornia distributed in the same habitat at Cho Bay, Trat Province, eastern Thailand were studied. The three species can be identified morphologically, however, some specimens have intermediate morphologies among them. G. firma has terminal branches without or with some furcations and blunt apices, first-order of branches always constricted at the bases; G. changii has many branches, inflated at the middle and tapering toward apices, all branches abruptly constricted at the bases; G. salicornia has cylindrical to compressed branches with regular or irregular arrangement of branches, constricted or continuous and intermediate species has branches inflated, tapering to apices, with and without constriction at bases. To elucidate the species status of Gracilaria species, we examined their photosynthetic and respiratory responses to irradiance and temperature by Oxygen Analyzer Series 3600. Net photosynthetic rate in species of Gracilaria from Trat Province was dependent on temperature. It increased with an increase in temperature from 25-35℃, while the rate decreased at 40℃. Photosynthetic responses were similar for all species when plants were exposed from 30 to 35℃. The P_<max> was significantly highest at 35℃ (0.39mg O_2cm^<-2>h^<-1>) for intermediate species, while the lowest was at 40℃ in G. firma (0.09mg O_2cm^<-2>h^<-1>). The photosynthetic rate responses to high irradiance and temperature by intermediate species are indicative of either adaptation to environmental variation or an outcome of hybridization between the three species. | |||||
書誌情報 |
Coastal marine science 巻 30, 号 1, p. 226-232, 発行日 2006-04-28 |
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ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 13493000 | |||||
書誌レコードID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA11957899 | |||||
フォーマット | ||||||
内容記述タイプ | Other | |||||
内容記述 | application/pdf | |||||
日本十進分類法 | ||||||
主題 | 452 | |||||
主題Scheme | NDC | |||||
出版者 | ||||||
出版者 | International Coastal Research Center, Ocean Research Institute, the University of Tokyo | |||||
出版者別名 | ||||||
東京大学海洋研究所国際沿岸海洋研究センター |