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Publication
Optimizing Growth Conditions and Biochemical Properties of Chondracanthus acicularis (Rhodophyta) in Laboratory Settings
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Advisor(s)
Abstract(s)
This study aimed to evaluate the laboratory cultivation of Chondracanthus acicu laris, focusing on key environmental parameters such as nutrient levels and light exposure.
The results provide insights into the optimal growth conditions and biochemical com position of C. acicularis, which are crucial for its sustainable exploitation in industrial
applications. Significant differences in the relative growth rate (RGR) and productivity (Y)
were found between the different treatments. Seaweed grown on Provasoli (PES) Medium
with white LED light and red LED light showed the best growth rates. Negative growth
was observed in treatments with Nutribloom plus®, and blue LED light. The proximate
composition analysis revealed a high moisture content across all treatments, with significant
differences in ash and organic matter content between the treatments. The use of LED light
played a crucial role in optimizing growth by influencing photosynthetic efficiency and
pigment production. The proximate composition varied significantly between treatments,
especially ash and organic matter. Light and nutrient conditions also influenced pigmenta tion and colour characteristics, with significant changes in phycoerythrin, phycocyanin,
and chlorophyll concentration. PES treatments consistently showed the highest colour
variation. These findings highlight the influence of environmental conditions on seaweed
growth, productivity, pigmentation, and proximate composition, and provide valuable
insights for optimized cultivation strategies.
Description
This work was funded by national funds through FCT—Fundação para a Ciência e a
Tecnologia, I.P., within the scope of the projects MARE—Centro de Ciências do Mar e do Ambiente,
UID/04292/MARE) and ARNET—Aquatic Research Network, LA/P/0069/2020 and the doctoral
grant awarded to Marta V. Freitas, UI/BD/150957/2021
Keywords
Nutrient medium Light wavelength Relative growth rate Productivity Proximate composition CIELab system Photosynthetic pigments
Citation
Mouga, T., Sousa, A., Freitas, M. V., & Afonso, C. (2025). Optimizing Growth Conditions and Biochemical Properties of Chondracanthus acicularis (Rhodophyta) in Laboratory Settings. Applied Sciences, 15(2), 810. https://doi.org/10.3390/app15020810
Publisher
MDPI