2种大型海藻类菌孢素氨基酸提取物对纳他霉素光降解的抑制作用

Inhibition effects of mycosporine-like amino acid extracts from two species of marine macroalgae on the photodegradation of natamycin

纳他霉素是一种天然的食品添加剂,光照会明显影响纳他霉素活性、加速其降解。类菌孢素氨基酸(MAAs)是大型海藻中广泛存在的一类水溶性化合物,具有抗紫外辐射等多种生物活性。将红毛苔和石花菜MAAs提取物,分别加入纳他霉素溶液中,分析MAAs提取物对纳他霉素光降解的影响。在光照试验第10d,对照组纳他霉素含量为原含量的10.20%,添加红毛苔和石花菜MAAs提取物光照组中纳他霉素含量分别为原含量的85.10%和82.81%。MAAs对纳他霉素的光降解表现出明显的抑制作用。进一步,分析了MAAs提取物浓度与其对纳他霉素光降解抑制作用间的关系。结果表明,随MAAs提取物浓度的增大,它们对纳他霉素光降解的抑制作用增强。这是第一次报道红毛苔和石花菜MAAs提取物对纳他霉素光降解的抑制作用。

Natamycin is a kind of natural food additive,light can obviously affect the activity of natamycin and accelerate its degradation.Mycosporine-like amino acids(MAAs)are a kind of water-soluble compounds widely existing in marine macroalgae,which have a variety of biological activities such as anti-ultraviolet radiation.The MAA extracts from Bangiafusco-purpurea and Gelidium amansii were respectively added to natamycin solution to analyze the inhibitory effects of MAAs on the photodegradation of natamycin.On the 10th day,natamycin in the control group was degraded to 10.20% of the original content,and the content of natamycin added with MAA extracts was 85.10% and 82.81% of the original content,respectively.Further,the relationship between the concentration of MAA extracts and its inhibition on the photodegradation of natamycin was analyzed.The results showed that the inhibitory effect of MAA extracts on the photodegradation of natamycin increased with the increase of the concentration of MAA extracts.This is the first time to report the inhibitory effect of MAA extracts from Bangiafusco-purpurea and Gelidium amansii on the photodegradation of natamycin.