光照强度对海黍子生长及部分生化指标的影响

Impact of irradiances on growth and biochemical composition of Sargassum muticum

中文关键词: 海黍子  光照  生长  化学组成

英文关键词: Sargassum muticum  Irradiances  Growth  Biochemical composition

中文摘要:

      在20、40、80、120、200 μmol/m2•s光照强度下，研究了光照梯度对海黍子Sargassum muticum的生长及藻体部分生化指标的影响。结果表明，在80~200 μmol/m2•s光照范围内时，海黍子的特定生长率都比较高，且无显著差异，光照低于80 μmol/m2•s后，生长率下降，显示了海黍子适宜较高光强的特性。叶绿素a、可溶性蛋白、可溶性糖在光照20 μmol/m2•s下含量最高。褐藻多酚含量在光照200 μmol/m2时比其余光照条件下增加明显。此特性对于从海黍子中提取褐藻多酚天然产物具有一定的指导意义。

英文摘要:

      The main effects of irradiances（20,40,80,120,200 μmol/m2•s） on growth and biochemical composition of Sargassum muticum were studied indoors.Higher growth rates of S. muticum were observed at irradiance of 80~200 μmol/m2•s, and the maximum content of some biochemicals (chlorophyll-a, chlorophyll-b, soluble protein, and soluble sugar) were obtained at the lowest irradiance (20 μmol/m2•s). The rapid increase of algae polyphenols was observed at the highest irradiance (200 μmol/m2•s).The finding has important implication for the extraction of natural polyphenols.