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Light supply and mineral nutrition conditions as optimization factors for outdoor mass culture of carotenogenic microalga Dunaliella salina
Aquaculture Research ( IF 2 ) Pub Date : 2021-07-18 , DOI: 10.1111/are.15471
Andrei B. Borovkov 1 , Irina N. Gudvilovich 1 , Anna L. Avsiyan 1 , Anastasiya O. Lantushenko 2
Affiliation  

The productivity characteristics of green halophilic algae Dunaliella salina during its pilot cultivation were compared between two nutrient media and under different illumination. Cultivation was carried out in ponds located in the greenhouse during summer season. Two main factors that determine rates of growth and pigments synthesis, as well as the pigments ratio in Dsalina grown outdoors in summer, are light and temperature conditions. The mean productivity of Dsalina culture grown in two nutrient media, differing in nutrients concentration, was the same, and the mean carotenoid accumulation rate was 30% higher when using Ben-Amotz medium (52 mg·m−2·day−1) than Johnson medium. Dsalina cell illumination was decreased by pond shading or by doubling their depth. Both these methods allowed reducing the level of the stress impact on algal culture under extreme light and temperature conditions. Shading of the ponds resulted in an increase in biomass and carotenoid productivity by 30% and 50%. However, a two-fold increase in ponds depth proved to be a more effective technological method, which allowed for an increase in Dsalina areal productivity both in biomass and carotenoids by a factor of 3.5–3.8. In conclusion, less concentrated medium and increasing culture depth may be recommended as the optimization factors for Dsalina outdoor cultivation.

中文翻译:

光照和矿质营养条件作为类胡萝卜素微藻盐生杜氏藻户外大规模培养的优化因素

比较了两种营养培养基和不同光照条件下绿色嗜盐藻盐生杜氏藻中试培养的生产力特性。夏季在温室中的池塘中进行栽培。决定生长速度和色素合成速度的两个主要因素,以及D 中色素的比例。 夏季户外生长的盐沼,有光照和温度条件。D的平均生产率。 在两种营养浓度不同的营养培养基中生长的盐渍藻培养物相同,使用 Ben-Amotz 培养基(52 mg·m -2 ·day -1) 比约翰逊培养基。d。 池塘遮荫或加倍深度会降低盐沼细胞的光照。这两种方法都可以降低在极端光照和温度条件下对藻类培养的压力影响水平。池塘遮荫导致生物量和类胡萝卜素生产力增加 30% 和 50%。然而,池塘深度增加两倍被证明是一种更有效的技术方法,它允许增加D。 盐碱地生物量和类胡萝卜素的面积生产力提高了 3.5-3.8 倍。总之,可以推荐浓度较低的培养基和增加培养深度作为D的优化因素。 盐沼 户外栽培。
更新日期:2021-07-18
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