红毛菜与坛紫菜光合作用和品质的比较分析

为研究两种经济红藻红毛菜(Bangia fucscopurpurea)和坛紫菜(Pyropia haitanensis)的光合作用和品质差异，选取一株野生型红毛菜CY和一株野生型坛紫菜NSD35作为实验材料，分别测定二者在相同培养条件下的关键光合参数和营养成分指标。结果显示：红毛菜的最大电子传递速率、净光合速率、藻红蛋白含量分别比坛紫菜高29.6%、96.8%、60.5%；必需矿质元素钾、钙、镁、铁、锌的含量分别比坛紫菜高59.5%、39.5%、34.1%、86.2%、68.4%；红毛菜的必需氨基酸和风味氨基酸含量都高于坛紫菜。此外，二者的呼吸速率、最大光量子产率、叶绿素a、总糖、总蛋白和碘含量没有显著差异。研究结果表明，与坛紫菜NSD35相比，红毛菜CY的光合速率更快，矿质元素积累能力更强，必需氨基酸和风味氨基酸含量更高。研究结果有助于了解红毛菜和坛紫菜的光合作用和品质特点，为开发红毛菜种质资源提供数据参考。

Comparative analysis of photosynthesis and quality Bangia fucscopurpurea and Pyropia haitanensis

To investigate the photosynthesis and quality differences of two commercial red algae Bangia fucscopurpurea and Pyropia haitanensis, a wild strain B. fucscopurpurea CY5 and a wild strain P. haitanensis NSD35 were selected for the study and the key photosynthetic parameters and nutritional composition were measured under the same growth conditions. Results showed that the maximum electron transfer rate, net photosynthetic rate, and phycoerythrin content of B. fucscopurpurea were 29.6%, 96.8% and 60.5% higher than those of P. haitanensis , respectively. The contents of potassium, calcium, magnesium, iron and zinc were 59.5%, 39.5%, 34.1%, 86.2% and 68.4% higher than those of P. haitanensis , respectively. The essential amino acid and flavor amino acid contents of B. fucscopurpurea were higher than those of P. haitanensis . In addition, there were no significant differences in respiration rate, maximum photochemical efficiency, chlorophyll a, total sugars, total protein and iodine content between the two species. It indicated that, compared with P. haitanensis NSD35, B. fucscopurpurea CY had faster photosynthetic rate, better accumulation of mineral elements and higher contents of essential and flavor amino acids. This study is helpful to understand the photosynthesis and quality characteristics of B. fucscopurpurea andP. haitanensis for data supplements and exploitations of B. fucscopurpurea germplasm resources.