生产虾青素的雨生红球藻藻株及其培养基筛选
2016-09-21吴晓娟唐小平苏艳秋罗国强通威股份有限公司四川成都610041
吴晓娟,唐小平,苏艳秋,罗国强(通威股份有限公司,四川成都610041)
生产虾青素的雨生红球藻藻株及其培养基筛选
吴晓娟,唐小平,苏艳秋,罗国强
(通威股份有限公司,四川成都610041)
为筛选获得适合大规模生产虾青素的藻株及适宜其生长和虾青素积累的培养基,研究比较了3个不同品系的雨生红球藻H 2、H 3、H 4在4种不同培养基BBM、BBM+1 g/L NaAC、SM、BG11中的生长和虾青素积累情况。结果表明:SM有利于雨生红球藻的生长和生物量的积累;而在相同培养基中,生长速度为H3>H2>H4。在所有试验组中,藻株H3在培养基SM中营养生长和生物量积累最快,在培养基BBM+1 g/LNaAC中虾青素含量(2.17%)和虾青素产量(30.1mg/L)最高,分别为其他试验组的1.16~4.72倍(P<0.05)和1.18~6.28倍(P<0.01)。因此,藻株H3比较适宜作为大规模培养的藻株,其最适生长繁殖和虾青素积累的培养基分别为SM和BBM+1 g/LNaAC。
雨生红球藻;培养基;干重;虾青素;筛选
[Abstract]Ⅰn order to gain the suitable algae and culturemedium for astaxanthin production,the influence of culture medium on the cell growth and astaxanthin accumulation of Haematococcus pluvialis were studied and compared.Three strains of Haematacoccus pluvialis(H2,H3 and H4)were cultured in four differentmedia(BBM,BBM+1 g/L NaAC,SM and BG11).The results showed that the SM medium was benefit for the growth and biomass accumulation of Haematacoc鄄cus pluvialis.Ⅰn the samemedium,the growth rate was faster in H3 than H2 and H4.Ⅰn all experimental groups,the strain H3 had the fastest growth rate and biomass accumulation rate in themedium SM,and had the highest astaxanthin content (2.17%)and astaxanthin yield(30.1mg/L)in BBM+1 g/L NaACmedium,reaching 1.16~4.72 times(P<0.05)and 1.18~6.28 times(P<0.01)of those of other experimental groups,respectively.So,the strain H3 was fit for large scale cultivation,and its optimalmedium for growth and astaxanthin accumulation were SM and BBM+1 g/L NaAC,respectively.
[Key words]Haematacoccus pluvialis;culturemedia;dry weight;astaxanthin;selection
雨生红球藻是一种淡水单细胞绿藻,其细胞内的虾青素含量高达4%,是已知的天然虾青素含量最高的生物,被认为是自然界中生产天然虾青素的最好来源(Orosa等,2005)。虾青素是一种具有很强抗氧化性的类胡萝卜素,具有促进抗体产生、增强免疫力、抑制肿瘤、清除自由基和活性氧以及抗紫外线辐射等多种生物功能 (Martin和Mark,2003)。雨生红球藻中的虾青素在结构、生理功能(稳定性和氧化活性)、应用效果及安全性等方面要优于合成虾青素(蔡明刚等,2003)。大量研究表明,富含虾青素的雨生红球藻作为饲料添加剂,对鱼、虾等养殖对象的着色、存活率、生长、繁殖和发育、生理功能和营养价值具有积极的意义(吴晓娟等,2015;……
