Publicação
Identification and optimization of the key growth parameters involved in carotenoids production of the marine microalga Pavlova gyrans
| Resumo: | In this work, a multivariate analysis was carried out, using a PlackettBurman (PB) design involving seventeen growth parameters, on carotenoids production of Pavlova gyrans (p<0.10). Each assay was analysed regarding its content (mg g1) of fucoxanthin (Fx), diatoxanthin, diadinoxanthin, -carotene (Car), -carotene, and the sum of all carotenoids analysed individually (TCar). According to the statistical analysis, modified medium formulations were developed for the particular cases of Fx, Car, and TCar. The study showed that Fx content was positively affected by nitrogen supplementation and lower light intensities. Higher concentrations of nitrogen and iron increased the final content of Car as well. Similarly, salinity, light intensity, nitrogen, iron, and cobalt were identified as key factors in TCar production. The PB-based formulations showed significant improvements (p<0.05) for TCar (11.794 mg g1) and Fx (6.153 mg g1) when compared to the control conditions (Walnes medium2.010 mg g1). Furthermore, effective control of key variables (e.g., light intensity) throughout P. gyrans growth proved successful (p<0.05), increasing the productivity of Fx (0.759 mg L1 d1) and TCar (1.615 mg L1 d1). |
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| Autores principais: | Maciel, José Filipe Gonçalves |
| Outros Autores: | Berni, Paulo; Geada, Pedro Miguel Macedo; Teixeira, J. A.; Silva, Joana; Vicente, A. A. |
| Assunto: | Beta carotene Carotenoids Culture media Light Microalgae Nitrogen Xanthophylls |
| Ano: | 2024 |
| País: | Portugal |
| Tipo de documento: | artigo |
| Tipo de acesso: | acesso aberto |
| Instituição associada: | Universidade do Minho |
| Idioma: | inglês |
| Origem: | RepositóriUM - Universidade do Minho |
| Resumo: | In this work, a multivariate analysis was carried out, using a PlackettBurman (PB) design involving seventeen growth parameters, on carotenoids production of Pavlova gyrans (p<0.10). Each assay was analysed regarding its content (mg g1) of fucoxanthin (Fx), diatoxanthin, diadinoxanthin, -carotene (Car), -carotene, and the sum of all carotenoids analysed individually (TCar). According to the statistical analysis, modified medium formulations were developed for the particular cases of Fx, Car, and TCar. The study showed that Fx content was positively affected by nitrogen supplementation and lower light intensities. Higher concentrations of nitrogen and iron increased the final content of Car as well. Similarly, salinity, light intensity, nitrogen, iron, and cobalt were identified as key factors in TCar production. The PB-based formulations showed significant improvements (p<0.05) for TCar (11.794 mg g1) and Fx (6.153 mg g1) when compared to the control conditions (Walnes medium2.010 mg g1). Furthermore, effective control of key variables (e.g., light intensity) throughout P. gyrans growth proved successful (p<0.05), increasing the productivity of Fx (0.759 mg L1 d1) and TCar (1.615 mg L1 d1). |
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