Effects of irradiance on growth, pigment content and photosynthetic efficiency on three peridinin-containing dinoflagellates

Islabão, Carolina Antuarte; Mendes, Carlos; Russo, Arnaldo D'Amaral Pereira Granja; Odebrecht, Clarisse

doi:10.1016/j.jembe.2016.08.012

Cited by 6 publications

(2 citation statements)

References 34 publications

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“…The highest dinoflagellate abundance (214 × 10 3 cells l −1 ) was observed in June, in accordance with the highest peridinin concentration (4.66 μg l −1 ) at the same period. The maximum dinoflagellate abundance was dominated by Scrippsiella acuminata in the study region, which was indicated as the carrier of peridinin by several studies (Zhang et al ., 2000; Wong & Wong, 2009; Islabão et al ., 2016). Thus, comparison of marker pigment values and microscopic cell counts indicates that a significant relationship between peridinin and dinoflagellate abundance was observed in the study region (Table 3, N = 42, P < 0.01, r = 0.819).…”

Section: Discussionmentioning

confidence: 99%

Assessment of phytoplankton group composition in the Golden Horn Estuary (Sea of Marmara, Turkey) determined with pigments measured by HPLC-CHEMTAX analyses and microscopy

2021

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Phtytoplankton group composition determined by microscopy was compared with high performance liquid chromatography (HPLC) derived from pigment signatures in surface water samples taken bi-weekly and monthly between October 2018 and September 2019 in the Golden Horn Estuary (Sea of Marmara). A total of 80 eukaryotic phytoplankton taxa belonging to eight algal classes were identified in surface water during the study period. Forty-three taxa (54%) were diatoms, 29 taxa (36%) were dinoflagellates and eight taxa (10%) were other phytoflagellates. The average contribution of diatoms to total phytoplankton abundance decreased considerably (41 to 25%), while the average contribution of dinoflagellates and other phytoflagellates increased markedly (59 to 75%) from the lower to the middle estuary. Chlorophyll-a and seven other group-specific pigments, including fucoxanthin, peridinin, chlorophyll-c1 + c2, alloxanthin, 19′-hexanoyloxyfucoxanthin, 19′-butanoyloxyfucoxanthin and divinyl chlorophyll-a were identified in the study area. The relative contribution of the major phytoplankton groups to chlorophyll-a was estimated on three different initial ratio matrices by CHEMTAX. The results obtained were compared with those from microscopic examination. It was concluded that the CHEMTAX method was not accurate enough to characterize the phytoplankton community in the Golden Horn Estuary ecosystem and microscopic analysis was essential to determine the major contributing species to chlorophyll-a.

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Section: Discussionmentioning

confidence: 99%

Assessment of phytoplankton group composition in the Golden Horn Estuary (Sea of Marmara, Turkey) determined with pigments measured by HPLC-CHEMTAX analyses and microscopy

2021

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“…As microalgas em sua composição possuem basicamente proteínas, carboidratos, lipídeos e ácidos graxos, sendo que as concentrações se diferenciam de acordo com a sua espécie e as características ambientais que são cultivadas. As condições de crescimento são importantes na formação da composição dos lipídeos, que tipicamente é composta por glicerol, açúcares ou bases esterificáveis e ácidos graxos (MIAO e WU, 2006, BAUMGÄRTNER et al, 2013, ISLABÃO et al, 2016. Além 426 Revista Brasileira de Energias Renováveis, v.7, n.4, p. 423-440, 2018 disso, os ácidos graxos podem ser saturados, monossaturados ou, ainda, poli-insaturados, sendo estas características influenciadas pela disponibilidade de carbono e nitrogênio no ambiente de crescimento das microalgas (SMEDES e ASKLAND, 1999, LEWIS et al, 2000, McGINN et al, 2011.…”

Section: Introductionunclassified

Transesterificação direta com diferentes solventes da microalga Chlorella vulgaris produzida em efluente doméstico

Trevisan¹,

Branco

Arroyo

2018

R. bras. Ener. Renov.

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ResumoPara a síntese de ésteres a partir de microalgas visando à produção de biocombustíveis, uma das possibilidades é a utilização da transesterificação direta, metodologia que possibilita reduzir o número de operações unitárias no processo. Desse modo, o presente trabalho teve por objetivo avaliar o rendimento em ésteres etílicos e a composição em ácidos graxos destes, obtidos na transesterificação direta da microalga Chlorella vulgaris cultivada em meio alternativo de efluente doméstico, utilizando os solventes hexano e clorofórmio, em quatro temperaturas distintas. A partir dos resultados obtidos, podem-se observar diferenças significativas quanto ao desempenho dos solventes hexano e clorofórmio, a partir de seu efeito como auxiliar na extração dos lipídeos da biomassa, durante a reação in situ. Dessa forma, o hexano apresentou um desempenho superior ao clorofórmio, sendo obtido um rendimento em ésteres etílicos de 137,75 mgésteres gbiomassa -1 , em um tempo de 150 minutos de reação, a 90 °C. Por outro lado o rendimento máximo em ésteres etílicos alcançado com o clorofórmio foi de 75,40 mgésteres gbiomassa -1 , a 75 °C, com 60 minutos de reação, sendo este ainda inferior ao hexano nas mesmas 424 Revista Brasileira de Energias Renováveis, v.7, n.4, p. 423-440, 2018condições (91,25 mgésteres gbiomassa -1 ). A composição em ácidos graxos para os ésteres etílicos obtidos, em todas as condições avaliadas, apresentou um predomínio de componentes insaturados, que tendem a permanecer acima de 70%, sendo que estas características podem levar a um ganho nas propriedades de ponto de entupimento do filtro a frio. Esses resultados indicam a potencialidade de utilização da transesterificação direta da biomassa de microalga Chlorella vulgaris para a obtenção de ésteres etílicos, visando ao processo de produção de biocombustíveis. Palavras-chave:Biomassa microalgal, ácidos graxos, reação in situ, ésteres etílicos, biocombustíveis. DIRECT TRANSESTERIFICATION OF CHLORELLA VULGARIS MICROALGAE PRODUCED IN DOMESTIC EFFLUENT USING DIFFERENT SOLVENTS AND TEMPERATURES AbstractFor a synthesis of esters from microalgae for the production of biofuels, one of the possibilities is a use of direct transesterification, a methodology that makes it possible to reduce the number of unitary units in the process. The objective of this study was to evaluate the yield of ethyl esters and the fatty acid composition obtained from the direct transesterification of Chlorella vulgaris microalgae grown in an alternative domestic effluent medium using hexane and chloroform solvents at four different temperatures. From the results obtained, it is possible to observe significant differences in the performance of the solvents hexane and chloroform, from its effect as an auxiliary in the extraction of the lipids of the biomass, during the reaction in situ.Thus, hexane performed better than chloroform, yielding an ethyl ester yield of 137.75 mgester gbiomass -1 in a reaction time of 150 minutes at 90 ° C. On the other hand, the maximum yield in esters ethyl...

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Light induces peridinin and docosahexaenoic acid accumulation in the dinoflagellate Durusdinium glynnii

Oliveira

Abreu

Santos

et al. 2022

Appl Microbiol Biotechnol

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Effects of irradiance on growth, pigment content and photosynthetic efficiency on three peridinin-containing dinoflagellates

Cited by 6 publications

References 34 publications

Assessment of phytoplankton group composition in the Golden Horn Estuary (Sea of Marmara, Turkey) determined with pigments measured by HPLC-CHEMTAX analyses and microscopy

Assessment of phytoplankton group composition in the Golden Horn Estuary (Sea of Marmara, Turkey) determined with pigments measured by HPLC-CHEMTAX analyses and microscopy

Transesterificação direta com diferentes solventes da microalga Chlorella vulgaris produzida em efluente doméstico

Light induces peridinin and docosahexaenoic acid accumulation in the dinoflagellate Durusdinium glynnii

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