Gracilaria tenuistipitata (Rhodophyta) tolerance to cadmium and copper exposure observed through gene expression and photosynthesis analyses

Tonon, Ângela Pedroso; Zaini, Paulo A.; Falcão, Vanessa dos Reis; Oliveira, Mariana Cabral de; Collén, Jonas; Boyen, Catherine; Colepicolo, Pio

doi:10.1007/s10811-017-1360-7

Cited by 13 publications

(4 citation statements)

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“…Understanding the photosynthetic response of plants is central to understanding the physiological response 37 . Table 4 shows the effects of amendments and Cd on photosynthetic parameters of cotton.…”

Section: Resultsmentioning

confidence: 99%

Effects of biochar and biofertilizer on cadmium-contaminated cotton growth and the antioxidative defense system

Zhu

Wang

et al. 2020

Sci Rep

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Consistent use of large amounts of fertilizers, pesticides, and mulch can cause the accumulation of harmful substances in cotton plants. Among these harmful substances, cadmium (Cd), an undegradable element, stands out as being particularly highly toxic to plants. The objective of this study was to evaluate the ability of biochar (3%) and biofertilizer (1.5%) to decrease Cd uptake, increase cotton dry weight, and modulate the activities of photosynthetic and peroxidase (POD), superoxide dismutase (SOD), catalase enzyme (CAT) in cotton (Gossypium hirsutum L.) grown in Cd-contaminated soil (0, 1, 2, or 4 mg Cd kg−1 soil) in pots. These studies showed that, as expected, exogenous Cd adversely affects cotton chlorophyll and photosynthesis. However, biochar and biofertilizer increased cotton dry weight by an average of 16.82% and 32.62%, respectively. Meanwhile, biochar and biofertilizer decreased the accumulation of Cd in cotton organs, and there was a significant reduction in the amount of Cd in bolls (P < 0.05). Biochar and biofertilizer have a positive impact on cotton chlorophyll content, net photosynthesis, stomatal conductance, transpiration rate, and intercellular CO2 concentration. Thus, the addition of biochar and biofertilizer promote cotton growth. However, biochar and biofertilizer increased the SOD activity of leaves (47.70% and 77.21%), CAT activity of leaves (35.40% and 72.82%), SOD activity of roots (33.62% and 39.37%), and CAT activity of roots (36.91% and 60.29%), respectively, and the addition of biochar and biofertilizer decreased the content of MDA and electrolyte leakage rate. Redundancy analyses showed that biochar and biofertilizer also improved SOD and POD activities by reducing the heavy metal-induced oxidative stress in cotton and reducing Cd uptake in cotton organs. Therefore, biochar and biofertilizer have a positive effect on the growth of cotton.

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Section: Resultsmentioning

confidence: 99%

Effects of biochar and biofertilizer on cadmium-contaminated cotton growth and the antioxidative defense system

Zhu

Wang

et al. 2020

Sci Rep

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“…Liu et al (2011) compared the toxicity of Cu and Cd on the motility of the two marine microalgae Isochrysis galbana and Tetraselmis chui, and their results demonstrated that the toxic effect of Cu on the motility of the two species was greater than that of Cd [41]. Tonon et al (2018) analyzed the tolerance of Gracilaria tenuistipitata to Cd and Cu by observing photosynthesis, and they found that the toxicity of Cu was also higher than Cd toxicity to Gracilaria tenuistipitata according to 6 days EC 50 [42]. Although the test organisms, toxicity test endpoints, and exposure times used in these previous studies were different from the present study, the toxicity ranking of the four heavy metals to the test organisms was in good agreement with our results.…”

Section: Discussionmentioning

confidence: 99%

A Sensitive Response Index Selection for Rapid Assessment of Heavy Metals Toxicity to the Photosynthesis of Chlorella pyrenoidosa Based on Rapid Chlorophyll Fluorescence Induction Kinetics

Gan

Yin

Zhao

et al. 2023

Toxics

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Heavy metals as toxic pollutants have important impacts on the photosynthesis of microalgae, thus seriously threatening the normal material circulation and energy flow of the aquatic ecosystem. In order to rapidly and sensitively detect the toxicity of heavy metals to microalgal photosynthesis, in this study, the effects of four typical toxic heavy metals, chromium (Cr(VI)), cadmium (Cd), mercury (Hg), and copper (Cu), on nine photosynthetic fluorescence parameters (φPo, ΨEo, φEo, δRo, ΨRo, φRo, FV/FO, PIABS, and Sm) derived from the chlorophyll fluorescence rise kinetics (OJIP) curve of microalga Chlorella pyrenoidosa, were investigated based on the chlorophyll fluorescence induction kinetics technique. By analyzing the change trends of each parameter with the concentrations of the four heavy metals, we found that compared with other parameters, φPo (maximum photochemical quantum yield of photosystem II), FV/FO (photochemical parameter of photosystem II), PIABS (photosynthetic performance index), and Sm (normalized area of the OJIP curve) demonstrated the same monotonic change characteristics with an increase in concentration of each heavy metal, indicating that these four parameters could be used as response indexes to quantitatively detect the toxicity of heavy metals. By further comparing the response performances of φPo, FV/FO, PIABS, and Sm to Cr(VI), Cd, Hg, and Cu, the results indicated that whether it was analyzed from the lowest observed effect concentration (LOEC), the influence degree by equal concentration of heavy metal, the 10% effective concentration (EC10), or the median effective concentration (EC50), the response sensitivities of PIABS to each heavy metal were all significantly superior to those of φRo, FV/FO, and Sm. Thus, PIABS was the most suitable response index for sensitive detection of heavy metals toxicity. Using PIABS as a response index to compare the toxicity of Cr(VI), Cd, Hg, and Cu to C. pyrenoidosa photosynthesis within 4 h by EC50 values, the results indicated that Hg was the most toxic, while Cr(VI) toxicity was the lowest. This study provides a sensitive response index for rapidly detecting the toxicity of heavy metals to microalgae based on the chlorophyll fluorescence induction kinetics technique.

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“…Among them, several species in the order Gracilariales have been explored as a source of agar and other compounds (Armisen 1995). The Gracilariales comprise around 240 known species of red macroalgae (Guiry and Guiry 2017, Tonon et al 2018, Lyra et al 2021, which occupy a broad diversity of marine habitats, especially in tropical and temperate seas. Due to their abundance in intertidal regions and their importance as a source of agar, the order has a long research history.…”

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confidence: 99%

“…The Gracilariales comprise around 240 known species of red macroalgae (Guiry and Guiry 2017, Tonon et al. 2018, Lyra et al. 2021), which occupy a broad diversity of marine habitats, especially in tropical and temperate seas.…”

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confidence: 99%

Insights into agar and secondary metabolite pathways from the genome of the red alga Gracilaria domingensis (Rhodophyta, Gracilariales)

Gouvea

Alves-Lima

Benites

et al. 2022

Journal of Phycology

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Gracilariales is a clade of florideophycean red macroalgae known for being the main source of agar. We present a de novo genome assembly and annotation of Gracilaria domingensis, an agarophyte alga with flattened thallus widely distributed along Central and South American Atlantic intertidal zones. In addition to structural analysis, an organizational comparison was done with other Rhodophyta genomes. The nuclear genome has 78 Mbp, with 11,437 predicted coding genes, 4,075 of which did not have hits in sequence databases. We also predicted 1,567 noncoding RNAs, distributed in 14 classes. The plastid and mitochondrion genome structures were also obtained. Genes related to agar synthesis were identified. Genes for type II galactose sulfurylases could not be found. Genes related to ascorbate synthesis were found. These results suggest an intricate connection of cell wall polysaccharide synthesis and the redox systems through the use of L‐galactose in Rhodophyta. The genome of G. domingensis should be valuable to phycological and aquacultural research, as it is the first tropical and Western Atlantic red macroalgal genome to be sequenced.

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Gracilaria tenuistipitata (Rhodophyta) tolerance to cadmium and copper exposure observed through gene expression and photosynthesis analyses

Cited by 13 publications

References 100 publications

Effects of biochar and biofertilizer on cadmium-contaminated cotton growth and the antioxidative defense system

Effects of biochar and biofertilizer on cadmium-contaminated cotton growth and the antioxidative defense system

A Sensitive Response Index Selection for Rapid Assessment of Heavy Metals Toxicity to the Photosynthesis of Chlorella pyrenoidosa Based on Rapid Chlorophyll Fluorescence Induction Kinetics

Insights into agar and secondary metabolite pathways from the genome of the red alga Gracilaria domingensis (Rhodophyta, Gracilariales)

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