| Intraspecific genetic analysis, gamete release performance, and growth of Sargassum muticum （Fucales, Phaeophyta） from China |
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| 引用本文： | 刘峰,逄少军,高素芹,单体锋.Intraspecific genetic analysis, gamete release performance, and growth of Sargassum muticum （Fucales, Phaeophyta） from China[J].中国海洋与湖沼学报,2013,31(6):1268-1275. |
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| 作者姓名： | 刘峰 逄少军 高素芹 单体锋 |
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| 作者单位： | Key Laboratory qf Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China |
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| 基金项目： | Supported by the National High Technology Research and Development Program of China （863 Program） （No. 2012AA10A413）, the National Natural Science Foundation of China （Nos. 41206146, 41176135）, and the Leading Academic Discipline Project of Shanghai Municipal Education Commission （No. J50701） The authors thank LIU Zhengyi, YAN Lei, JIANG Xige, XU Na and SUN Zhengping for their assistance in algal collection and culture. |
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| 摘 要： | Sargassum muticum is one of the most abundant and conspicuous native macroalgae species on the northern coasts of China. It often forms large-scale seaweed beds in subtidal zones. This investigation was designed to understand the intraspecific genetic relationships of this alga based on samples collected from four northern coastal sites of China, and to evaluate gamete release and growth capacity in laboratory conditions. The nuclear internal transcribed spacer 2 （ITS2） sequences of 16 samples from four locations were identical. Based on cox3 gene and partial rbcLS operon sequences, intraspecific genetic variability was detected with three and two ribotypes, respectively. Temperature, not irradiance, was shown to significantly affect gamete release and fertilization. Elevated temperature and irradiance enhanced the growth of germlings and vegetative branchlets. Maximum growth rate of germlings was detected at 18-24℃and an irradiance of 60-100 μmol photons/（m^2.s）. Under ambient conditions （12-25℃ and 60-125 gmol photons/ （m2.s））, relative growth rate of young branchlets could reach 7.5%/d.
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| 关 键 词： | 中国北方 羊栖菜 遗传分析 种内 释放性能 配子 鹿角 褐藻 |
Intraspecific genetic analysis, gamete release performance, and growth of Sargassum muticum (Fucales, Phaeophyta) from China |
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| Feng Liu,Shaojun Pang,Suqin Gao,Tifeng Shan.Intraspecific genetic analysis, gamete release performance, and growth of Sargassum muticum (Fucales, Phaeophyta) from China[J].Chinese Journal of Oceanology and Limnology,2013,31(6):1268-1275. |
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| Authors: | Feng Liu Shaojun Pang Suqin Gao Tifeng Shan |
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| Institution: | 1. Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, 266071, China
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| Abstract: | Sargassum muticum is one of the most abundant and conspicuous native macroalgae species on the northern coasts of China. It often forms large-scale seaweed beds in subtidal zones. This investigation was designed to understand the intraspecific genetic relationships of this alga based on samples collected from four northern coastal sites of China, and to evaluate gamete release and growth capacity in laboratory conditions. The nuclear internal transcribed spacer 2 (ITS2) sequences of 16 samples from four locations were identical. Based on cox3 gene and partial rbcLS operon sequences, intraspecific genetic variability was detected with three and two ribotypes, respectively. Temperature, not irradiance, was shown to significantly affect gamete release and fertilization. Elevated temperature and irradiance enhanced the growth of germlings and vegetative branchlets. Maximum growth rate of germlings was detected at 18–24°C and an irradiance of 60–100 μmol photons/(m2·s). Under ambient conditions (12–25°C and 60–125 μmol photons/(m2·s)), relative growth rate of young branchlets could reach 7.5%/d. |
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| Keywords: | Sargassum muticum receptacle gamete release fertilization rate north China coast |
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