Photosynthetic production of hydrogen peroxide by Ulva rigida C. Ag. (Chlorophyta)

Collén, Jonas; Río, M. Jiménez del; García‐Reina, Guillermo; Pedersén, Marianne

doi:10.1007/bf00201378

Cited by 86 publications

(45 citation statements)

References 44 publications

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“…Release of ROS by algae could be a metabolically ''low-cost'' chemical defense system (Collen et al 1995). ROS contain no carbon, nitrogen, or phosphate, which are typical components of organic toxins; thus, ROS are produced with a minimal nutritional burden to the cells.…”

Section: Discussionmentioning

confidence: 99%

Toxic effects of Heterosigma akashiwo do not appear to be mediated by hydrogen peroxide

Twiner

Dixon

Trick

2001

Limnology & Oceanography

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The ichthyotoxic red tide organism Heterosigma akashiwo (Raphidophyceae) has been associated with fish kill events within the aquaculture industry for many years. The precise toxicological mechanism involved in these fish kills is unclear; however, much research attention has focused on the production of reactive oxygen species (ROS) by these toxic algae. In this study, we investigated the production of hydrogen peroxide (

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Section: Discussionmentioning

confidence: 99%

Toxic effects of Heterosigma akashiwo do not appear to be mediated by hydrogen peroxide

Twiner

Dixon

Trick

2001

Limnology & Oceanography

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“…As depicted in Eqs. (1-2), algae are able to facilitate photodegradation by increasing the free radical yield (Collén et al 1995;Liu et al 2004;Peng et al 2006). The photodegradation of Norfloxacin was enhanced with algae concentration and was influenced by temperature and pH of the solution (Zhang et al 2012a).…”

Section: Photodegradationmentioning

confidence: 99%

Removal of pharmaceuticals and personal care products from wastewater using algae-based technologies: a review

Wang

Liu

et al. 2017

Rev Environ Sci Biotechnol

150

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Pharmaceuticals and personal care products (PPCPs) consist of a variety of compounds extensively used for the treatment of human and animal diseases and for health or cosmetic reasons. PPCPs are considered as emerging environmental contaminants due to their ubiquitous presence in the environment and high environmental risks. In wastewater treatment plants using conventional activated sludge processes, many PPCPs cannot be efficiently removed. Therefore, there is an increasing need for more effective and cost-efficiency ways of removing PPCPs while treating wastewater. Algae-based technologies have recently attracted growing attentions for their potential application in wastewater treatment and hazardous contaminant removal, which are advantages in reducing operation cost while generating valuable products and sequestrating greenhouse gases at the same time. This work reviews the up-to date researches to reveal potential toxic effects of PPCPs on algae and algae-bacteria consortia, identify mechanisms involved in PPCP removal, and assess the fate of PPCPs in algae-based treatment systems. Current researches suggest that algae and algae-bacteria consortia have great potentials in PPCP removal but more works are required before algae-based technologies can be implemented in large scales. Knowledge gaps are identified and further research focuses are proposed in this review.

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“…If chemical defence against fouling is uncommon, other mechanisms must be responsible for the low epibiotic cover found on many seaweed species. Such mechanisms may be mechanical defences such as cuticle peeling or physiological responses such as oxidative bursts, whereby large amounts of activated oxygen species are produced and rapidly released in response to an attack by a fouling organism (Collen et al 1995, Weinberger et al 1999, Weinberger & Friedlander 2000.…”

Section: Is Chemical Inhibition Of Fouling By Seaweeds a Rare Phenomementioning

confidence: 99%

Chemical versus mechanical inhibition of fouling in the red alga Dilsea carnosa

Nylund¹,

Pavia²

2005

Mar. Ecol. Prog. Ser.

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In this study, we used field experiments in natural populations to test whether the low degree of fouling found naturally on the red alga Dilsea carnosa (Schmidel) O. Kuntze (1893) is due to chemical inhibition by antifouling metabolites. Extracts with concentrations volumetrically equivalent to whole algal tissue were incorporated into stable gels, which served as settlement substrata for potential fouling organisms. The gels were placed in the field during several time periods, covering all seasons. We also investigated the fouling intensity on living D. carnosa plants to be able to compare fouling on algae with fouling on gels. The extracts inhibited recruitment of a few fouling organisms, but they were not effective against the dominant bryozoan fouling species Electra pilosa and Membranipora membranacea. Furthermore, a relatively high number of these species occasionally recruited onto D. carnosa plants. Hence, chemical inhibition of fouling could not explain the low degree of fouling of bryozoan species found naturally on D. carnosa. Instead, based on field observations showing that D. carnosa is able to shed its epidermis, we hypothesised that the low degree of fouling is primarily due to cuticle peeling, whereby the alga sloughs off the outermost cell layer in order to remove associated fouling organisms. This hypothesis was tested in a field survey in which D. carnosa plants were marked and surveyed for about 5 mo. The results show that individual algae that experienced a radical drop in their fouling cover had distinct traces of cuticle peeling. Hence, this study suggests that the dominant fouling organisms are not chemically inhibited by D. carnosa. Instead, the low degree of fouling found naturally on D. carnosa is probably a consequence of a mechanical defence, whereby the alga sloughs off the outermost cell layer in order to remove associated epibiota.

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Photosynthetic production of hydrogen peroxide by Ulva rigida C. Ag. (Chlorophyta)

Cited by 86 publications

References 44 publications

Toxic effects of Heterosigma akashiwo do not appear to be mediated by hydrogen peroxide

Toxic effects of Heterosigma akashiwo do not appear to be mediated by hydrogen peroxide

Removal of pharmaceuticals and personal care products from wastewater using algae-based technologies: a review

Chemical versus mechanical inhibition of fouling in the red alga Dilsea carnosa

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