Effects of light quality on the growth, productivity, fucoxanthin accumulation, and fatty acid composition of Thalassiosira pseudonana

IF 2.8 3区生物学 Q3 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Journal of Applied Phycology Pub Date : 2024-04-10 DOI:10.1007/s10811-024-03245-7

Maoyingzang Peng, Shiyu Lin, Yinghan Shen, Ruibing Peng, Sheng Li, Xiamin Jiang, Maowang Jiang

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Abstract

Thalassiosira pseudonana, a fast-growing and nutritionally rich planktonic diatom, has been cultivated on a large scale as high-quality plankton feed. Despite this, studies exploring the impact of light quality on the growth and compositional attributes of this algal species are scarce. This study investigated the effects of five different light qualities—white, red, yellow, green, and blue—on the growth, biomass, fucoxanthin accumulation, and fatty acid composition and content of T. pseudonana. The results indicated that T. pseudonana achieved the highest growth rate and greatest biomass under white and blue light, with the poorest performance observed under red light. Moreover, fucoxanthin accumulation was most pronounced under blue light, reaching 4.729 ± 0.182 mg g^-1, followed in descending order by yellow, red, white, and green light. The total lipid content was highest under yellow light at 34%, significantly surpassing the levels observed under other conditions, with the order of effectiveness being blue light > green light ≥ red light ≥ white light. Analysis of fatty acid composition revealed a greater diversity under blue light, with a total of 15 types, whereas green light yielded only 10 types. The proportion of unsaturated fatty acids was highest under blue light at 69.71%, followed by yellow, white, green, and red light. Specifically, the performance of polyunsaturated fatty acids (PUFAs) varied as follows: yellow light (36.7%) > blue light (34.09%) > white light (33.29%) > green light (23.67%) > red light (17%). The concentration of eicosapentaenoic acid (EPA) was significantly greater under blue (17.03%) and yellow (16.31%) light compared to other treatments, with the lowest concentration (8.84%) observed under red light. In conclusion, blue light significantly enhances the growth rate of T. pseudonana and fosters fucoxanthin accumulation. Both yellow and blue light are favorable for the accumulation of PUFAs and EPA.

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光质对伪尾柱虫生长、生产力、狐黄素积累和脂肪酸组成的影响

假褐藻（Thalassiosira pseudonana）是一种生长迅速、营养丰富的浮游硅藻，已被作为优质浮游生物饲料进行大规模养殖。尽管如此，探索光质对这种藻类的生长和组成属性的影响的研究却很少。本研究调查了五种不同光质（白色、红色、黄色、绿色和蓝色）对假褐藻的生长、生物量、岩藻黄素积累、脂肪酸组成和含量的影响。结果表明，假褐藻在白光和蓝光下的生长率最高，生物量最大，而在红光下的表现最差。此外，蓝光下的岩藻黄质积累最为显著，达到 4.729 ± 0.182 mg g-1，其次依次为黄光、红光、白光和绿光。总脂质含量在黄光下最高，达到 34%，明显超过在其他条件下观察到的水平，效果顺序为蓝光 >；绿光 ≥ 红光 ≥ 白光。脂肪酸组成分析表明，蓝光下的脂肪酸种类更多，共有 15 种，而绿光下只有 10 种。不饱和脂肪酸的比例在蓝光下最高，为 69.71%，其次是黄光、白光、绿光和红光。具体来说，多不饱和脂肪酸（PUFAs）的表现变化如下：黄光（36.7%）；蓝光（34.09%）；白光（33.29%）；绿光（23.67%）；红光（17%）。与其他处理相比，蓝光（17.03%）和黄光（16.31%）下二十碳五烯酸（EPA）的浓度明显更高，红光下的浓度最低（8.84%）。总之，蓝光能明显提高伪尾柱虫的生长速度，促进岩藻黄素的积累。黄光和蓝光都有利于 PUFA 和 EPA 的积累。

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来源期刊

Journal of Applied Phycology 生物-海洋与淡水生物学

CiteScore

6.80

自引率

9.10%

发文量

212

审稿时长

2.8 months

期刊介绍： The Journal of Applied Phycology publishes work on the rapidly expanding subject of the commercial use of algae. The journal accepts submissions on fundamental research, development of techniques and practical applications in such areas as algal and cyanobacterial biotechnology and genetic engineering, tissues culture, culture collections, commercially useful micro-algae and their products, mariculture, algalization and soil fertility, pollution and fouling, monitoring, toxicity tests, toxic compounds, antibiotics and other biologically active compounds. Each issue of the Journal of Applied Phycology also includes a short section for brief notes and general information on new products, patents and company news.