An investigation into the kinetics and mechanism of the removal of cyanobacteria by extract of Ephedra equisetina root.

An aqueous extract of Ephedra equisetina root was found to induce cyanobacterial cell death. The extract displayed no negative effects on the fish populations but instead, improved the habitat conditions for the growth of macrophytes, zooplankton and bacteria because the inhibiting effects of the ex...

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Autores principales:	Rong Yan, Hongli Ji, Yonghong Wu, Philip G Kerr, Yanming Fang, Linzhang Yang
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2012
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/02e6ea7e2a0d4b8b8b8a578ed8694f69
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spelling	oai:doaj.org-article:02e6ea7e2a0d4b8b8b8a578ed8694f692021-11-18T07:10:03ZAn investigation into the kinetics and mechanism of the removal of cyanobacteria by extract of Ephedra equisetina root.1932-620310.1371/journal.pone.0042285https://doaj.org/article/02e6ea7e2a0d4b8b8b8a578ed8694f692012-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/22870313/?tool=EBIhttps://doaj.org/toc/1932-6203An aqueous extract of Ephedra equisetina root was found to induce cyanobacterial cell death. The extract displayed no negative effects on the fish populations but instead, improved the habitat conditions for the growth of macrophytes, zooplankton and bacteria because the inhibiting effects of the extracts on cyanobacteria helped clear up the water column. The removal kinetics of cyanobacteria by E. equisetina extract appears to be a first order process with the rate constant being extract-dose-dependent. Compounds including the flavonoids found in E. equisetina root kill the cyanobacteria in vitro at a dose of 5.0 µg extract per 100 mL water or above. The extract constituents act to disrupt the thylakoid membrane, interrupt the electronic transport, decrease the effective quantum yield, and eventually lead to the failure of photosynthesis in Microcystis aeruginosa. This study presents an easily-deployed, natural and promising approach for controlling cyanobacterial blooms as an emergency measure, and also provides insight into the dynamics and mechanism of the extract consisting of multiple compounds synergistically removing algae.Rong YanHongli JiYonghong WuPhilip G KerrYanming FangLinzhang YangPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 7, Iss 8, p e42285 (2012)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Rong Yan Hongli Ji Yonghong Wu Philip G Kerr Yanming Fang Linzhang Yang An investigation into the kinetics and mechanism of the removal of cyanobacteria by extract of Ephedra equisetina root.
description	An aqueous extract of Ephedra equisetina root was found to induce cyanobacterial cell death. The extract displayed no negative effects on the fish populations but instead, improved the habitat conditions for the growth of macrophytes, zooplankton and bacteria because the inhibiting effects of the extracts on cyanobacteria helped clear up the water column. The removal kinetics of cyanobacteria by E. equisetina extract appears to be a first order process with the rate constant being extract-dose-dependent. Compounds including the flavonoids found in E. equisetina root kill the cyanobacteria in vitro at a dose of 5.0 µg extract per 100 mL water or above. The extract constituents act to disrupt the thylakoid membrane, interrupt the electronic transport, decrease the effective quantum yield, and eventually lead to the failure of photosynthesis in Microcystis aeruginosa. This study presents an easily-deployed, natural and promising approach for controlling cyanobacterial blooms as an emergency measure, and also provides insight into the dynamics and mechanism of the extract consisting of multiple compounds synergistically removing algae.
format	article
author	Rong Yan Hongli Ji Yonghong Wu Philip G Kerr Yanming Fang Linzhang Yang
author_facet	Rong Yan Hongli Ji Yonghong Wu Philip G Kerr Yanming Fang Linzhang Yang
author_sort	Rong Yan
title	An investigation into the kinetics and mechanism of the removal of cyanobacteria by extract of Ephedra equisetina root.
title_short	An investigation into the kinetics and mechanism of the removal of cyanobacteria by extract of Ephedra equisetina root.
title_full	An investigation into the kinetics and mechanism of the removal of cyanobacteria by extract of Ephedra equisetina root.
title_fullStr	An investigation into the kinetics and mechanism of the removal of cyanobacteria by extract of Ephedra equisetina root.
title_full_unstemmed	An investigation into the kinetics and mechanism of the removal of cyanobacteria by extract of Ephedra equisetina root.
title_sort	investigation into the kinetics and mechanism of the removal of cyanobacteria by extract of ephedra equisetina root.
publisher	Public Library of Science (PLoS)
publishDate	2012
url	https://doaj.org/article/02e6ea7e2a0d4b8b8b8a578ed8694f69
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An investigation into the kinetics and mechanism of the removal of cyanobacteria by extract of Ephedra equisetina root.

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