Growth responses of Nannochloris oculata droop and Phaeodactylum tricornutum bohlin to the herbicide atrazine as influenced by light intensity and temperature

Mayasich, Joseph M.; Karlander, Edward P.; Terlizzi, Daniel E.

doi:10.1016/0166-445x(86)90063-9

Cited by 43 publications

(14 citation statements)

References 26 publications

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“…The first studies examining the relationships between light and herbicides date from the 1980s (O'Neal and Lembi, 1983;Mayasich et al, 1986). O'Neal and Lembi (1983) observed that the effectiveness of the herbicide simazine (a triazine herbicide often used to control algal growth in USA and Europe) was influenced by light intensity.…”

Section: Case Of Psii Inhibitors and Lightmentioning

confidence: 99%

“…Millie et al (1992) demonstrated that increases in simazine-toxicity for high light photoacclimated A. circinalis were correlated with reductions in pigment contents (chlorophyll a, c-phycocianin, and carotenoids), leading the authors to suggest that algal sensitivity to PSII inhibitors is affected by alterations in their pigment contents. In their study of the interactive effects of light (0.208, 0.780, and 1.352 mW/cm 2 ) and atrazine (also a triazine herbicide-0.05 and 0.10 µg l −1 ) on the marine algae Phaeodactylum tricornutum, Mayasich et al (1986) observed that the inhibitory effects of this herbicide were greater at low light intensities. These authors hypothesized that cells preacclimated to higher light acquired protective mechanisms of sufficient capacity to dissipate atrazine-induced photo-oxidative stress by diverting the excitation energy from PSII to PSI and/or through quenching by carotenoid pigments.…”

Section: Case Of Psii Inhibitors and Lightmentioning

confidence: 99%

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Temperature and Light Modulation of Herbicide Toxicity on Algal and Cyanobacterial Physiology

Gomes

Juneau

2017

Front. Environ. Sci.

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HIGHLIGHTS• We reviewed the interaction between light, temperature and herbicides on algal and cyanobacterial physiology.• Temperature is the main factor affecting herbicide toxicity to algae and cyanobacteria.• Changes in light environment may modulate the effects of photosynthesis-targeting herbicides.Important interactions between climatic parameters and herbicide toxicity have been discussed in the literature. As climate changes are expected to influence the growth conditions of aquatic photosynthetic organisms over the next century by modifying the physicochemical parameters of the environment (such as temperature and incident light characteristics), the following questions arise: How will variations in climatic conditions influence herbicide toxicity in algae and cyanobacteria? Are these coupled effects on aquatic photosynthetic organism physiology antagonistic, additive, or synergistic?We discuss here the physiological responses of algae and cyanobacteria to the combined effects of environmental changes (temperature and light) and herbicide exposure. Both temperature and light are proposed to influence herbicide toxicity through acclimation processes that are mainly related to cell size and photosynthesis. Algal and cyanobacterial responses to interactions between light, temperature, and herbicides are species-specific, making it difficult today to establish a single model of how climate changes will affect toxicity of herbicides. Acclimation processes could assure the maintenance of primary production but total biodiversity should decrease in communities exposed to herbicides under changing temperature and light conditions. The inclusion of considerations on the impacts of environmental changes on toxicity of herbicides in water quality guidelines directed toward protecting aquatic life is now urgently needed.Keywords: environment, toxicity, hazardous, pollutants, algae, cyanobacteria Gomes and JuneauHerbicides/Climate Changes on PhytoplanktonGraphical Abstract | Changes in temperature and light conditions in water systems over the next century will drive physiological responses of algal and cyanobacterial community to herbicides, by antagonistic, additive, or synergic effects with these pollutants.

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Section: Case Of Psii Inhibitors and Lightmentioning

confidence: 99%

Section: Case Of Psii Inhibitors and Lightmentioning

confidence: 99%

Temperature and Light Modulation of Herbicide Toxicity on Algal and Cyanobacterial Physiology

Gomes

Juneau

2017

Front. Environ. Sci.

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“…clevei under low light intensity. Increased sensitivity to atrazine under low light intensity was also observed in the marine diatom Phaeodactylum tricornutum . Deblois et al found that the planktonic diatoms Fragilaria crotonensis and Aulacoseira granulata var.…”

Section: Discussionmentioning

confidence: 91%

The influence of reduced light intensity on the response of benthic diatoms to herbicide exposure

Wood

Mitrovic

Lim

et al. 2016

Enviro Toxic and Chemistry

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Herbicide pollution events in aquatic ecosystems often coincide with increased turbidity and reduced light intensity. It is therefore important to determine whether reduced light intensity can influence herbicide toxicity, especially to primary producers such as benthic diatoms. Benthic diatoms collected from 4 rivers were exposed to herbicides in 48 h rapid toxicity tests under high light (100 µmol m(-2) s(-1) ) and low light (20 µmol m(-2) s(-1) ) intensities. The effects of 2 herbicides (atrazine and glyphosate) were assessed on 26 freshwater benthic diatom taxa. There was no significant interaction of light and herbicide effects at the community level or on the majority (22 of 26) of benthic diatom taxa. This indicates that low light levels will likely have only a minor influence on the response of benthic diatoms to herbicides. Environ Toxicol Chem 2016;35:2252-2260. © 2016 SETAC.

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“…Direct comparisons of LC 50 or EC 50 values obtained with several freshwater invertebrates are somewhat difficult because laboratory culture conditions usually differ with regard to photoperiod, temperature, exposure time and composition of culture media. In the case of atrazine and SDS, it is known that their toxicities can increase with increasing temperature (Folt et al 1999;Mayasich et al 1986). Therefore, differences in LC 50 or EC 50 values should be treated with caution when comparing intrinsic differences in the sensitivity among the cladoceran species.…”

Section: Discussionmentioning

confidence: 99%

Acute and chronic effects of atrazine and sodium dodecyl sulfate on the tropical freshwater cladoceran Pseudosida ramosa

Freitas

2012

Ecotoxicology

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Toxicities of atrazine and sodium dodecyl sulfate (SDS) to the tropical freshwater cladoceran Pseudosida ramosa were studied in the laboratory. Acute tests showed that the 48-h LC₅₀ of atrazine was 20.9 mg l⁻¹, while that of SDS was 11.1 mg l⁻¹. P. ramosa showed to be slightly more sensitive than the other species of temperate cladocerans, in the assay conditions specified for each one. Long-term exposure of P. ramosa individuals to atrazine decreased the 21-day fecundity, the 21-day fertility and r(m), at concentrations ranging from 0.8 to 3.2 mg l⁻¹. Furthermore, fecundity and fertility at each brood decreased from the first to the fifth, at concentrations ranging from 0.8 to 3.2 mg l⁻¹ and for the first three broods at the concentration of 0.4 mg l⁻¹. Long-term exposure of female P. ramosa to SDS decreased the 21-day fecundity, the 21-day fertility and r(m), at concentrations of 2 and 4 mg l⁻¹. Fecundity and fertility of each brood were reduced from the first to the fifth, at concentrations of 2-4 mg l⁻¹, and for the first three at concentrations of 0.5 and 1 mg l⁻¹. The survival and moulting of the adult females were not affected by either chemical at the concentrations tested. Many water quality criteria in tropical regions are based on ecotoxicological tests with non-native species and this may lead to errors in setting the maximum permissible levels of chemicals in water bodies. Therefore, we reiterate here the idea of using native species in ecotoxicological assessments.

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Growth responses of Nannochloris oculata droop and Phaeodactylum tricornutum bohlin to the herbicide atrazine as influenced by light intensity and temperature

Cited by 43 publications

References 26 publications

Temperature and Light Modulation of Herbicide Toxicity on Algal and Cyanobacterial Physiology

Temperature and Light Modulation of Herbicide Toxicity on Algal and Cyanobacterial Physiology

The influence of reduced light intensity on the response of benthic diatoms to herbicide exposure

Acute and chronic effects of atrazine and sodium dodecyl sulfate on the tropical freshwater cladoceran Pseudosida ramosa

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