Effect of LED light sources on the growth and chemical composition of brown seaweed Treptacantha barbata
- PDF / 434,586 Bytes
- 13 Pages / 439.37 x 666.142 pts Page_size
- 95 Downloads / 193 Views
Effect of LED light sources on the growth and chemical composition of brown seaweed Treptacantha barbata Cenk Öztaşkent 1 & İlknur Ak 2 Received: 22 June 2020 / Accepted: 2 November 2020/ # Springer Nature Switzerland AG 2020
Abstract
In this study, thalli of brown seaweed Treptacantha barbata (Stackhouse) Orellana & Sansón were cultured under four colors of LED light (yellow, blue, green, and red) with cool white fluorescent light as a control, to test how the spectral composition of light affected their growth and biochemical composition under laboratory cultivation. The intensity was 100 μmol photon m2 s−1 of light. The specific growth rates, pigment and proximate compositions, sodium alginate, and fatty acid composition of the thalli were studied. The red LEDs provided the highest specific growth rate. The highest lipid content of the thalli of T. barbata occurred under both fluorescent light and green LED lights. Blue LED light produced the highest sodium alginate content (p ≤ .05). The results for fatty acid methyl esters showed that all four LED light sources influenced the fatty acid contents of T. barbata. The polyunsaturated fatty acid levels of T. barbata cultured in LED light sources were extremely high. We suggest that LED lights could be used to grow T. barbata in replacement of the fluorescent lighting currently used. Keywords Brown seaweed . Fatty acid composition . LED lights . Pigment composition . Proximate content . Relative growth rate
Introduction The brown algae Treptacantha barbata (Stackhouse) Orellana & Sansón grows in the Black Sea, the Mediterranean Sea, and the eastern part of the Atlantic Ocean (Guiry and Guiry 2020). This seaweed grows in the littoral zone (Cirik and Cirik 2011). The thallus of T. barbata is a hermaphrodite, and it reaches a maximum length of 170 cm (Cirik and Cirik 2011; Manev
* İlknur Ak [email protected]
1
Department of Aquaculture, Graduate School of Natural and Applied Sciences, Canakkale Onsekiz Mart University, Çanakkale, Turkey
2
Department of Aquaculture, Marine Sciences and Technology Faculty, Canakkale Onsekiz Mart University, Terzioğlu Campus, Çanakkale, Turkey
Aquaculture International
et al. 2013). This seaweed is a source of alginic acid salts, iodine-containing amino acids, polyunsaturated fatty acid (PUFA), antioxidants, and micro- and macroelements (e.g., iodine, bromine, potassium, calcium, magnesium, chlorine, sulfur, selenium) (Ak and Türker 2018a, b; Caf et al. 2019; Cirik and Cirik 2011; Manev et al. 2013; Milchakova 2011). According to Manev et al. (2013), it is the second most used species with a considerable economic value in the Black Sea because of its high content of alginic acid. Baghdadli et al. (1990) carried out preliminary studies on artificial cultivation of these algae, and they concluded that T. barbata is suitable for industrial cultivation. Physical and chemical factors such as temperature, light, CO2 concentration, and the nutrient composition of the seawater affect the growth rate and biochemical composition of Tr
Data Loading...
