Advanced search
Start date
Betweenand
Related content
(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

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

Full text
Author(s):
Chia, Mathias Ahii [1, 2] ; Bittencourt-Oliveira, Maria do Carm [2]
Total Authors: 2
Affiliation:
[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
Total Affiliations: 2
Document type: Journal article
Source: Hydrobiologia; v. 848, n. 19 JUL 2021.
Web of Science Citations: 0
Abstract

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)

FAPESP's process: 14/26898-6 - Unravelling some physiological and molecular processes involved in the allelopathic interactions between toxic and non-toxic phytoplankton
Grantee:Mathias Ahii Chia
Support Opportunities: Scholarships abroad - Research Internship - Post-doctor
FAPESP's process: 13/11306-3 - The Effects of anatoxin-a and cylindrospermopsin at different nitrogen concentrations and photon irradiances on the physiology of Microcystis aeruginosa (Cyanobacteria) and Scenedesmus acuminatus (Chlolrophyta)
Grantee:Mathias Ahii Chia
Support Opportunities: Scholarships in Brazil - Post-Doctoral