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Establishment of ultrasonic stimulation to enhance growth of Haematococcus lacustris

Authors
Han, Sang-IlJeon, Min SeoAhn, Joon-WooChoi, Yoon-E
Issue Date
9월-2022
Publisher
ELSEVIER SCI LTD
Keywords
Haematococcus lacustris; Astaxanthin; Ultrasonication; Cell division
Citation
BIORESOURCE TECHNOLOGY, v.360
Indexed
SCIE
SCOPUS
Journal Title
BIORESOURCE TECHNOLOGY
Volume
360
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/142725
DOI
10.1016/j.biortech.2022.127525
ISSN
0960-8524
Abstract
In this study, ultrasonication at a frequency of 40 kHz was used to shorten the sonication period and enhance the growth of Haematococcus lacustris. To confirm the optimal conditions, the effects of ultrasound output and treatment interval were examined. Under optimal conditions (20 W and 15-day cycle), the maximum cell density and chlorophyll content were 66.75 x 10(4) cells mL(-1) and 36.54 mg g(-1), respectively, which were increased by 50.00% and 39.01%, respectively, compared to the control. Transmission electron microscopy analysis showed that ultrasonication caused tiny cracks in the W4 and W6 strata but did not disrupt the inner W2 layer. Additionally, RT-qPCR analysis showed that ultrasonication upregulated both cell division and nitrogen uptake. No difference were detected in the composition or quantity of fatty acids. This study demonstrates a novel ultrasonic approach for enhancing the growth of H. lacustris.
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College of Life Sciences and Biotechnology > Division of Environmental Science and Ecological Engineering > 1. Journal Articles

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