陈海昇,刘东超,王晓梁,陈柏安,徐聪

• 1:广东海洋大学水产学院
• 2:广东省藻类养殖及应用工程技术中心

摘要(Abstract)：

【目的】探索不同附着基质对长茎葡萄蕨藻(Caulerpalentillifera)直立枝生长及藻体附着效果的影响。【方法】对长茎葡萄蕨藻直立枝以垂直砂埋、水平砂埋、塑料网网夹、尼龙网网夹及无附着基质(对照组)五种附着方式进行实验,探究长茎葡萄蕨藻直立枝的生长、附着能力、光合特性参数及营养含量的变化。【结果】垂直砂埋处理下,藻体的新生直立枝质量、质量长度比及球状小枝的直径与其他各组相比最优(P <0.05),分别是0.313 3 g、0.086 6 g/mm和1.67 mm,是对照组的7.38、9.62、1.67倍;水平砂埋与对照组相比,藻体附着能力有显著增强(P <0.05),假根数为26,长度为30.77 mm及假根附着砂砾质量为0.566 0 g;除对照组外,各组最大光能转化效率(Fv/Fm)和实际光化学效率Y(II)值呈先下降后上升趋势,24 h后垂直沙埋藻体Fv/Fm和Y(II)最快恢复原始水平,为0.856μmol·m~(-2)·s~(-1)和0.851μmol·m~(-2)·s~(-1),显著高于其余组(P <0.05);垂直砂埋与水平砂埋处理后的藻体,其可溶性糖含量分别比对照组显著降低34.24%和33.93%(P<0.05),而网夹处理后,没有显著差异(P> 0.05)。垂直砂埋处理对藻体总蛋白含量增加有显著促进作用,是对照组的1.26倍(P <0.05)。【结论】长茎葡萄蕨藻直立枝以垂直砂埋附着方式生长最佳,以水平砂埋附着方式附着更牢固。

关键词(KeyWords)： 长茎葡萄蕨藻;附着基;生长;附着能力;营养成分;光合特性

Abstract:

Keywords:

基金项目(Foundation): 广东省科技计划(2015A020209167)

作者(Author): 陈海昇,刘东超,王晓梁,陈柏安,徐聪

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