Microalgal swimming signatures and neutral lipids production across growth phases.,Biotechnology and Bioengineering

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Microalgal swimming signatures and neutral lipids production across growth phases.
Biotechnology and Bioengineering ( IF 3.5 ) Pub Date : 2020-01-20 , DOI: 10.1002/bit.27271
Jiaqi You _{1,

2} , Kevin Mallery _{1,

3} , Douglas G Mashek ₄ , Mark Sanders ₅ , Jiarong Hong _{1,

3} , Miki Hondzo _{1,

2}

Affiliation

Microalgae have been shown as a potential bioresource for food, biofuel, and pharmaceutical products. During the growth phases with corresponding environmental conditions, microalgae accumulate different amounts of various metabolites. We quantified the neutral lipids accumulation and analyzed the swimming signatures (speed and trajectories) of the motile green alga, Dunaliella primolecta, during the lag-exponential-stationary growth cycle at different nutrient concentrations. We discovered significant changes in the neutral lipid content and swimming signatures of microalgae across growth phases. The timing of the maximum swimming speed coincided with the maximum neutral lipid content and both maxima occurred under nutrient stress at the stationary growth phase. Furthermore, the swimming trajectories suggested statistically significant changes in swimming modes at the stationary growth phase when the maximum intracellular neutral lipid content was observed. Our results provide the potential exploitation of microalgal swimming signatures as possible indicators of the cultivation conditions and the timing of microalgal harvest to maximize the lipid yield for biofuel production. The findings can also be implemented to explore the production of food and antibiotics from other microalgal metabolites with low energy costs.

中文翻译：

整个生长阶段的微藻游泳信号和中性脂质的产生。

微藻已被证明是食品，生物燃料和药品的潜在生物资源。在具有相应环境条件的生长阶段，微藻类会积累不同量的各种代谢产物。我们对中性脂质的积累进行了定量，并分析了在不同营养素浓度下的滞后-指数-静止生长周期中，运动性绿藻杜氏藻的游动特征（速度和轨迹）。我们发现中性脂质含量和整个生长阶段的微藻游泳标志发生了显着变化。最大游泳速度的时机与最大中性脂质含量相吻合，并且两个最大值都发生在静止生长阶段的营养胁迫下。此外，当观察到最大的细胞内中性脂质含量时，游泳轨迹表明在静止生长期的游泳方式有统计学意义的变化。我们的结果提供了微藻游泳信号的潜在开发潜力，可作为培养条件和微藻收获时间的指标，以最大程度地提高生物燃料生产的脂质产量。这些发现还可以用于探索以其他低能耗的微藻代谢物生产食品和抗生素的方法。我们的结果提供了微藻游泳信号的潜在开发潜力，可作为培养条件和微藻收获时间的指标，以最大程度地提高生物燃料生产的脂质产量。这些发现还可以用于探索以其他低能耗的微藻代谢物生产食品和抗生素的方法。我们的结果提供了微藻游泳信号的潜在开发潜力，可作为培养条件和微藻收获时间的指标，以最大程度地提高生物燃料生产的脂质产量。这些发现还可以用于探索以其他低能耗的微藻代谢物生产食品和抗生素的方法。

更新日期：2020-03-09

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