| Registro completo |
| Provedor de dados: |
Acta Botanica
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| País: |
Brazil
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| Título: |
Effects of salinity on the physiology of the red macroalga, Acanthophora spicifera (Rhodophyta, Ceramiales)
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| Autores: |
Pereira,Débora Tomazi
Simioni,Carmen
Filipin,Elisa Poltronieri
Bouvie,Fernanda
Ramlov,Fernanda
Maraschin,Marcelo
Bouzon,Zenilda Laurita
Schmidt,Éder Carlos
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| Data: |
2017-12-01
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| Ano: |
2017
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| Palavras-chave: |
Acanthophora spicifera
Microscopy
Morphology
Physiology
Salinity
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| Resumo: |
ABSTRACT Salinity is an important abiotic factor since it is responsible for the local and/or regional distribution of algae. In coastal regions, salinity changes with prevailing winds, precipitation and tide, and particularly in extreme intertidal conditions. Acanthophora spicifera is a red seaweed that occurs in the supratidal region in which changes in abiotic conditions occur frequently. This study evaluated the effects of salinity on the metabolism and morphology of A. spicifera. Algae were acclimatized under culture conditions with sterilized seawater for seven days. Experiments used different salinities (15 to 50 psu) for seven days, followed by metabolic analyses. This study demonstrates that extreme salinities affect physiological parameters of A. spicifera, such as decrease in growth rate, as well as morphological parameters and concentrations of secondary metabolites. Acanthophora spicifera exhibited high tolerance to 25 to 40 psu, with little change in physiology, which favors the occurrence of this species in diverse environments. However, 15, 20, 45 and 50 psu were the most damaging and led to loss of biomass, depigmentation of apices, and the highest concentrations of antioxidant metabolites. The 50 psu treatment caused the greatest changes in general, greatly reducing a biomass and chlorophyll content, and facilitating the presence of endophytes.
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| Tipo: |
Info:eu-repo/semantics/article
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| Idioma: |
Inglês
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| Identificador: |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062017000400555
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| Editor: |
Sociedade Botânica do Brasil
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| Relação: |
10.1590/0102-33062017abb0059
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| Formato: |
text/html
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| Fonte: |
Acta Botanica Brasilica v.31 n.4 2017
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| Direitos: |
info:eu-repo/semantics/openAccess
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