Chlorophyll fluorescence based copper toxicity assessment of two algal species

Kumar, K. Suresh; Han, Young Seok; Choo, Kyung‐sil; Kong, Jeong-Ae; Han, Taejun

doi:10.1007/bf03216459

Cited by 16 publications

(7 citation statements)

References 10 publications

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“…2C). A similar reduction in Fv/Fm was previously reported in the macroalgae Ulva pertusa (Kumar et al, 2009) and in Ulva rigida exposed to copper (Barraza and Carballeira, 1999). In addition, a decrease in PI ABS was observed under thermal stress in the cyanobacterium Arthrospira platensis and in the macroalgae Fucus serratus (Jueterbock et al, 2014).…”

Section: Discussionsupporting

confidence: 78%

A novel cyclophilin gene from the dinoflagellate Prorocentrum minimum and its possible role in the environmental stress response

Ponmani

Guo

2015

Chemosphere

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Section: Discussionsupporting

confidence: 78%

A novel cyclophilin gene from the dinoflagellate Prorocentrum minimum and its possible role in the environmental stress response

Ponmani

Guo

2015

Chemosphere

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“…Han et al [ 15 ] found that F v / F m was significantly suppressed in the middle sections of the thalli of U. australis and U. armoricana at an exposure of 0.25 mg∙L −1 . In U. australis , Kumar et al [ 45 ] found EC 50 s of 0.37–0.48 mg∙L −1 Cu for F v / F m and 0.16–0.21 mg∙L −1 Cu for ETR max , which are in line with our findings ( Table 3 ).…”

Section: Resultssupporting

confidence: 93%

Metal Toxicity across Different Thallus Sections of the Green Macroalga, Ulva australis

Lee

Kim

Depuydt

et al. 2023

Toxics

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We aimed to identify functional differences between different sections of the thallus of Ulva australis and develop tissue-endpoint combinations to assess the toxicity of six metals (i.e., Ag, As, Cd, Cr, Cu, and Ni). EC50 values for these metals in three sections of the thallus of Ulva were obtained for multiple endpoints: relative growth rate (RGR), chlorophyll a fluorescence, pigment contents, and the expression of the photosynthesis-related gene, rbcL. The responses of the endpoints varied across the respective thallus sections; overall, the most toxic metals were Ag and Cu. These endpoints were the best for evaluating metal toxicity: ETRmax of the middle thallus sections for Ag toxicity; RGR of the middle thallus section for As and Cd; ETRmax of the marginal thallus section for Cr; Chl b contents of the marginal thallus section for Cu; RGR of the basal thallus section for Ni. The EC50 values for the inhibition of ETRmax in middle (0.06 mg∙L−1) and Chl b in the marginal thallus sections (0.06 mg∙L−1) were all lower than those of the quality standard for wastewater discharge values of Ag and Cu in Republic of Korea and the US, pointing to the suitability of U. australis-based endpoints for risk assessment.

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“…Interestingly, no significant effect on photosynthetic related parameters, except ETR, were observed in the groups exposed to MPS and MPS-Cu ( Figure 5 ). These results are similar to the finding of Kumar et al [ 43 ], in which the measured values of photosynthetic parameters, except for ETRmax, were not different from the control when exposed to copper at a concentration of 250 μg/L. However, MPS-Cd stress induced decreased photosynthetic performance and ETR.…”

Section: Discussionsupporting

confidence: 91%

Transcriptomic Changes Induced by Low and High Concentrations of Heavy Metal Exposure in Ulva pertusa

Seo

Park

et al. 2023

Toxics

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The impact of sewage and wastewater pollution on marine ecosystems is of increasing concern due to the rapid accumulation of heavy metals in seaweeds inhabiting near-shore environments. Seaweeds can be severely damaged by heavy metals throughout their life cycles. Although the physiological and ecological effects of heavy metal exposure have been studied, there is limited research on their molecular responses. Ulva pertusa is a prevalent seaweed species in South Korea and is ecologically significant in coastal ecosystems. We utilized high-throughput RNA sequencing to analyze changes in the transcriptome profiles of U. pertusa under low concentrations of heavy metals (MPS) and high concentrations of copper (MPS-Cu) and cadmium (MPS-Cd). Differential gene expression analysis revealed that 53 (control vs. MPS), 27 (MPS vs. MPS-Cd), and 725 (MPS vs. MPS-Cu) genes were expressed differentially. Differentially expressed genes identified in our study included those with protective roles against oxidative stress and those involved in metal transport to the vacuole. Furthermore, exposure to heavy metal stress had a negative impact on the photosynthetic apparatus structural proteins of U. pertusa, resulting in photosynthetic inhibition. Moreover, exposure to high concentrations of copper resulted in the activation of carbon-related metabolism. These findings contribute to our understanding of the molecular mechanisms underlying heavy metal toxicity in U. pertusa.

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Chlorophyll fluorescence based copper toxicity assessment of two algal species

Cited by 16 publications

References 10 publications

A novel cyclophilin gene from the dinoflagellate Prorocentrum minimum and its possible role in the environmental stress response

A novel cyclophilin gene from the dinoflagellate Prorocentrum minimum and its possible role in the environmental stress response

Metal Toxicity across Different Thallus Sections of the Green Macroalga, Ulva australis

Transcriptomic Changes Induced by Low and High Concentrations of Heavy Metal Exposure in Ulva pertusa

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