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Prospecting volatile compounds produced by Brazilian cyanobacteria with allelopathic effects

Grant number: 11/51950-3
Support Opportunities:Research Grants - Research Partnership for Technological Innovation - PITE
Start date: July 01, 2012
End date: June 30, 2014
Field of knowledge:Physical Sciences and Mathematics - Chemistry - Organic Chemistry
Agreement: Agilent
Principal Investigator:Ernani Pinto Junior
Grantee:Ernani Pinto Junior
Host Institution: Faculdade de Ciências Farmacêuticas (FCF). Universidade de São Paulo (USP). São Paulo , SP, Brazil
Company: Agilent Technologies Brasil Ltda
City: São Paulo

Abstract

Co-occurrence of toxic cyanobacteria blooming in different aquatic environments in several regions of Brazil (Northeast, Center east, Southeast and South) has already been registered. Among the negative consequences, the production of volatile organic compounds (VOCs) is of major importance. The most commonly VOCs are geosmin and 2-methylisoborneol, which resist to conventional water treatment procedures, causing odor issues, and can bioaccumulate in fish and shellfish. Moreover, allelopathic effects of VOCs in the aquatic community have been observed. In this regard, competition studies between cyanobacterial strains or between cyanobacteria and other organisms may shed light on the role played by VOCs in the environment. Thus, this study aims to evaluate the production of VOCs by different strains of cyanobacteria isolated from Brazilian reservoirs while developing effective analytical routines for their determination. The effect of environmental variables (light, temperature and pH) on the production of VOCs will also be evaluated. In order to investigate the possible allelopathic effects of these compounds, culture exudates will be tested in mixed cultivation flasks or in single species cultures. VOCs production will be followed by GC/MS employing methods developed for their correct identification. At the end, we aim to collect evidence over the production of VOCs and their effect on the physiologic parameters of cyanobacteria, providing data on the role played by these compounds and contributing to increase the scarce information currently available in Brazil and other countries. (AU)

Articles published in Agência FAPESP Newsletter about the research grant:
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Scientific publications (5)
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
SANZ, MIRIAM; DOERR, FELIPE AUGUSTO; PINTO, ERNANI. First report of spumigin production by the toxic Sphaerospermopsis torques-reginae cyanobacterium. Toxicon, v. 108, p. 15-18, . (14/50420-9, 12/25272-0, 11/51950-3)
MORETTO, JESSICA A.; FREITAS, PALOMA N. N.; SOUZA, JULIANA P.; OLIVEIRA, THALITA M.; BRITES, ISABELLA; PINTO, ERNANI. Off-Flavors in Aquacultured Fish: Origins and Implications for Consumers. FISHES, v. 7, n. 1, p. 12-pg., . (21/00149-0, 13/05969-0, 13/07914-8, 11/51950-3)
DE SOUZA, ALEXANDER OSSANES; TERAMOTO, KAZUMI KINOSHITA; DE FREITAS, PALOMA NATHANE NUNES; DE ALMEIDA, ERYKA COSTA; FERREIRA FILHO, SIDNEY SECKLER; PINTO, ERNANI. Effect of pre-chlorination on Microcystis aeruginosa cell integrity and microcystins removal. URBAN WATER JOURNAL, v. 20, n. 8, p. 11-pg., . (11/51950-3)
SILVA MORETTO, JESSICA APARECIDA; NUNES DE FREITAS, PALOMA NATHANE; DE ALMEIDA, ERYKA COSTA; ALTARUGIO, LUCAS MIGUEL; DA SILVA, SIMONE VIEIRA; FIORE, MARLI DE FATIMA; PINTO, ERNANI. Effects of different cultivation conditions on the production of beta-cyclocitral and beta-ionone in Microcystis aeruginosa. BMC Microbiology, v. 22, n. 1, p. 13-pg., . (21/00149-0, 13/05969-0, 13/07914-8, 11/51950-3)