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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Allelopathic interactions between phytoplankton species alter toxin production, oxidative response, and nitrogen fixation

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Autor(es):
Chia, Mathias Ahii [1, 2] ; Bittencourt-Oliveira, Maria do Carm [2]
Número total de Autores: 2
Afiliação do(s) autor(es):
[1] Ahmadu Bello Univ, Dept Bot, Zaria - Nigeria
[2] Univ Sao Paulo, Luiz de Queiroz Coll Agr, Dept Biol Sci, Ave Padua Dias 11, BR-13418900 Piracicaba, SP - Brazil
Número total de Afiliações: 2
Tipo de documento: Artigo Científico
Fonte: Hydrobiologia; v. 848, n. 19 JUL 2021.
Citações Web of Science: 0
Resumo

Phytoplankton allelopathic studies have mostly been restricted methodologically, leading to very limited quantitative physiological data. In the present study, investigations were carried out to determine physiological changes that occur during allelopathic interactions between chlorophytes (Chlamydomonas reinhardtii P.A. Dangeard 1888; Selenastrum sp.) and cyanobacteria (Microcystis aeruginosa (Kutzing) Kutzing, Microcystis sp. SR, Anabaena variabilis Kutzing ex Bornet \& Flahault 1886) using nylon membrane partitioned chambers. The growth of the cyanobacteria and chlorophytes were both stimulated and inhibited in a species-dependent manner. Among the chlorophytes, the Fv/Fm values of Selenastrum were significantly inhibited by Microcystis LE3 and Anabaena UTEX B377 during co-cultivation. There was a significant change in the Fv/Fm values of Anabaena UTEX B377 during co-cultivation with Chlamydomonas CC-503 and Selenastrum. Total microcystins content of Microcystis LE3 significantly declined during co-cultivation with Chlamydomonas CC-503 and Selenastrum. Nitrogen fixation by Anabaena UTEX B377 was significantly lowered in the presence of Microcystis LE3, Microcystis SR, Chlamydomonas CC-503, and Selenastrum. Antioxidant enzyme activities of the investigated chlorophytes and cyanobacteria were altered during allelopathic interactions with each other. These results revealed that phytoplankton species undergo various physiological changes during allelopathic interactions. (AU)

Processo FAPESP: 14/26898-6 - Revelando alguns processos fisiológicos e moleculares envolvidos nas interações alelopáticas entre fitoplâncton tóxico e não-tóxicos
Beneficiário:Mathias Ahii Chia
Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Pós-Doutorado
Processo FAPESP: 13/11306-3 - Efeitos de anatoxina-a e cilindrospermopsina em diferentes concentrações de nitrogênio e irradiância na fisiologia de Microcystis aeruginosa (Cyanobacteria)e Scenedesmus acuminatus (Chlorophyta)
Beneficiário:Mathias Ahii Chia
Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado