Transcriptome Analysis of Spirulina platensis sp. at Different Salinity and Nutrient Compositions for Sustainable Cultivation in Vietnam

Dang Diem Hong (), Hoang Thi Minh Hien, Le Thi Thom, Nguyen Cam Ha, Le Anh Huy, Ngo Thi Hoai Thu, Nguyen Cuong, Doris Ying Ying Tang and Pau Loke Show ()
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Dang Diem Hong: Institute of Biotechnology, Vietnam Academy of Science and Technology, Hanoi 100000, Vietnam
Hoang Thi Minh Hien: Institute of Biotechnology, Vietnam Academy of Science and Technology, Hanoi 100000, Vietnam
Le Thi Thom: Institute of Biotechnology, Vietnam Academy of Science and Technology, Hanoi 100000, Vietnam
Nguyen Cam Ha: Institute of Biotechnology, Vietnam Academy of Science and Technology, Hanoi 100000, Vietnam
Le Anh Huy: Institute of Biotechnology, Vietnam Academy of Science and Technology, Hanoi 100000, Vietnam
Ngo Thi Hoai Thu: Institute of Biotechnology, Vietnam Academy of Science and Technology, Hanoi 100000, Vietnam
Nguyen Cuong: LOBI Viet Nam Co., Ltd., Hanoi 100000, Vietnam
Doris Ying Ying Tang: Department of Chemical and Environmental Engineering, Faculty of Science and Engineering, University of Nottingham Malaysia, Jalan Broga, Semenyih 43500, Selangor Darul Ehsan, Malaysia
Pau Loke Show: Department of Chemical Engineering, Khalifa University, Abu Dhabi P.O. Box 127788, United Arab Emirates

Sustainability, 2023, vol. 15, issue 15, 1-18

Abstract: This study investigates the suitability of Spirulina-Ogawa-Terui (SOT) culture media with various nutrition concentrations for the laboratory growth of salt-tolerant Spirulina platensis ST. Among the four saltwater mediums, 25% SOT media (42‰ salinity) demonstrated a satisfactory performance, with maximum absorbance at a wavelength 556 nm reading of 0.76. After 15 cultivation days, the protein, carbohydrate, lipid, phycocyanin, chlorophyll a, and carotenoid contents reached 48.73%, 22.14%, 7.32%, 10.23%, 0.53%, and 0.12% of the dry cell weight (DCW), respectively. The growth of S. platensis ST is influenced by the culture medium with a salinity of 13‰ and 52‰, as well as different nutrient compositions. Transcriptional sequencing revealed that the response of S. platensis ST to salt stress was mainly expressed by regulating the gene expression involved in metabolic pathways such as photosynthesis and signaling transduction. Under nutritional and salt stress, S. platensis ST responds by modulating the gene expression involved in the synthesis of vital molecules, for example, growth regulators and adenosine triphosphate (ATP) producers. In conclusion, this study provides an insight into enhancing the ability of S. platensis to tolerate salt stress. The findings indicate that future efforts in algal-based cultivation research in seawater should focus on increasing the productivity to develop a sustainable industry for biomass production.

Keywords: cyanobacteria; nutrition composition; salinity tolerance; Spirulina platensis ST; transcriptome (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2023
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