通过ITS基因特异扩增测序,对大鹏半岛海域46种石珊瑚ITS基因片段序列进行了比较分析。结果表明,该片段序列长度在674~806碱基对(bp)之间,A、T含量在40%~55.5%之间,大部分物种的序列碱基A、T含量小于G、C含量。46种造礁珊瑚的平均遗传距...通过ITS基因特异扩增测序,对大鹏半岛海域46种石珊瑚ITS基因片段序列进行了比较分析。结果表明,该片段序列长度在674~806碱基对(bp)之间,A、T含量在40%~55.5%之间,大部分物种的序列碱基A、T含量小于G、C含量。46种造礁珊瑚的平均遗传距离为0.261。采用邻位连接(NJ)和最小进化(ME)法分别构建15种复合型珊瑚的5.8S r DNA系统发育树和28种坚实型珊瑚的ITS2系统发育树,结果显示15种复合型珊瑚的5.8S r RNA序列系统进化聚类结果较符合传统形态学分类结果,而28种坚实型珊瑚的ITS2序列系统进化聚类结果与传统形态学存在较大的差异,提示石珊瑚表型的变异性可能对传统分类存在影响。展开更多
The existing hermatypic coral community is composed of localities in different successional ages.Data sets were selected from original sampling data to deduce the trajectory of community structure in this and subseque...The existing hermatypic coral community is composed of localities in different successional ages.Data sets were selected from original sampling data to deduce the trajectory of community structure in this and subsequent papers.Patterns of species composition and abundance distribution during community succession in the scope of different habitats were described in this paper.It is found that the effect of succession on community structure is closely correlated with the environmental conditions.Each coral assemblage in different habitat has its own distinguishing temporal pattern of species composition and abundance distribution.展开更多
Coral mucus covers the surface of coral and contains antibacterial substances as a first line of defense. Coral mucus not only enables the coral itself to resist disease, but also provides antibacterial agents for peo...Coral mucus covers the surface of coral and contains antibacterial substances as a first line of defense. Coral mucus not only enables the coral itself to resist disease, but also provides antibacterial agents for people. We collected mucus from a scleractinian coral （Symphyllia gigantea） at Sta. Sanya （China）, then extracted the antibacterial substances using 10% glacial acetic acid with the help of antiprotease inhibitors, and tested the antibacterial activity by a terrestrial bacterium （Staphylococcus aurevs） and a marine bacterium （Vibrio anguillarum）. The result showed that, there were antibacterial agents in the mucus, and their antibacterial activities were lost by treatment of the sample at 90 ℃ water for 10 min.展开更多
文摘通过ITS基因特异扩增测序,对大鹏半岛海域46种石珊瑚ITS基因片段序列进行了比较分析。结果表明,该片段序列长度在674~806碱基对(bp)之间,A、T含量在40%~55.5%之间,大部分物种的序列碱基A、T含量小于G、C含量。46种造礁珊瑚的平均遗传距离为0.261。采用邻位连接(NJ)和最小进化(ME)法分别构建15种复合型珊瑚的5.8S r DNA系统发育树和28种坚实型珊瑚的ITS2系统发育树,结果显示15种复合型珊瑚的5.8S r RNA序列系统进化聚类结果较符合传统形态学分类结果,而28种坚实型珊瑚的ITS2序列系统进化聚类结果与传统形态学存在较大的差异,提示石珊瑚表型的变异性可能对传统分类存在影响。
文摘The existing hermatypic coral community is composed of localities in different successional ages.Data sets were selected from original sampling data to deduce the trajectory of community structure in this and subsequent papers.Patterns of species composition and abundance distribution during community succession in the scope of different habitats were described in this paper.It is found that the effect of succession on community structure is closely correlated with the environmental conditions.Each coral assemblage in different habitat has its own distinguishing temporal pattern of species composition and abundance distribution.
基金This work was supported by the National Natural Science Foundation of China under contract No.40576052the Scientific Research Foundation of China Three Gorges University under contract No.0620060113.
文摘Coral mucus covers the surface of coral and contains antibacterial substances as a first line of defense. Coral mucus not only enables the coral itself to resist disease, but also provides antibacterial agents for people. We collected mucus from a scleractinian coral （Symphyllia gigantea） at Sta. Sanya （China）, then extracted the antibacterial substances using 10% glacial acetic acid with the help of antiprotease inhibitors, and tested the antibacterial activity by a terrestrial bacterium （Staphylococcus aurevs） and a marine bacterium （Vibrio anguillarum）. The result showed that, there were antibacterial agents in the mucus, and their antibacterial activities were lost by treatment of the sample at 90 ℃ water for 10 min.
