Response of Microcystis aeruginosa BCCUSP 232 to barley (Hordeum vulgare L.) straw degradation extract and fractions

Autor(es)

Mecina, Gustavo Franciscatti ; Dokkedal, Anne Ligia ; Saldanha, Luiz Leonardo ; Chia, Mathias Ahii ; Cordeiro-Araujo, Micheline Kezia ; Bittencourt-Oliveira, Maria do Carmo ; da Silva, Regildo Marcio Goncalves

• Tipo de documento: Artigo Científico
• Fonte: Science of The Total Environment; v. 599, p. 1837-1847, DEC 1 2017.
• Citações Web of Science: 7

Resumo

The eutrophication of aquatic ecosystems is a serious environmental problem that leads to increased frequency of cyanobacterial blooms and concentrations of cyanotoxins. These changes in aquatic chemistry can negatively affect animal and human health. Environment-friendly methods are needed to control bloom forming cyanobacteria. We investigated the effect of Hordeum vulgare L. (barley) straw degradation extract and its fractions on the growth, oxidative stress, antioxidant enzyme activities, and microcystins content of Microcystis aeruginosa (Razing) Razing BCCUSP232. Exposure to the extract significantly (p < 0.05) inhibited the growth of M. aeruginosa throughout the study, whereas only the highest concentration of fractions 1 and 2 significantly (p < 0.05) reduced the growth of the cyanobacterium on day 10 of the experiment. The production of reactive oxygen species (ROS), lipid peroxidation and antioxidant enzyme activities were significantly (p < 0.05) altered by the extract and fractions 1 and 2. Phytochemical profiling of the extract and its fractions revealed that the barley straw degradation process yielded predominantly phenolic acids. These results demonstrate that barley straw extract and its fractions can efficiently interfere with the growth and development of M. aeruginosa under laboratory conditions. (C) 2017 Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 14/17126-0 - Caracterização de compostos de Hordeum vulgare L. (Poaceae) e Tridax procumbens L. (Asteraceae) para o desenvolvimento de método alternativo no controle das cianobactérias produtoras de cianotoxinas
• Beneficiário: Gustavo Franciscatti Mecina
• Modalidade de apoio: Bolsas no Brasil - Doutorado