Environmentally relevant copper concentrations stimulate photosynthesis in Monoraphidium sp.

Dauda, Suleiman; Lombardi, Ana Teresa

doi:10.1007/s11120-022-00976-x

Cited by 5 publications

(6 citation statements)

References 52 publications

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“…Chl a/b ratio is related to the light absorption efficiency of photosynthesis or the PSII antenna size (Kume et al 2018) of microalgae; the lower the ratio, the larger the antenna size (Kirst et al 2012; Perrine et al 2012). Although low Chl a / b ratio is linked to large antenna size, it does not lead to higher photosynthesis (Negi et al 2020; Dauda and Lombardi 2023), as recorded in this study (Figure 1b). A similar decrease in Chl a/b , as observed in C. pantanale here, was also recorded in Monoraphidium sp.…”

Section: Discussionsupporting

confidence: 67%

“…The rETR m of A. flexuosus in this study decreased at lower Cu concentrations in comparison to Monoraphidium sp. (Dauda and Lombardi 2023), which decreased at 589 nM Cu 2+ , and Chlorolobion braunii (Baracho et al 2019), which decreased at 5000 nM Cu 2+ . In contrast to our results, the E k of Scenedesmus quadricauda showed very high resilience to Cu ions (Yong et al 2018), which may be related to the genus.…”

Section: Discussionmentioning

confidence: 97%

“…A similar increase in rETR m at 7.4 nM Cu 2+ was reported in Monoraphidium sp. (Dauda and Lombardi 2023). The F v /F o is a good indicator of stress condition because it immediately shows high amplitude changes even when small changes occur in F v and F o (Lichtenthaler et al 2005).…”

Section: Discussionmentioning

confidence: 97%

“…The finding that certain environmental concentrations of Cu can boost the photosynthesis of some species of microalgae (Dauda and Lombardi 2023) suggests that the microalgal biota in aquatic environments may change according to slight variations the Cu levels. The two microalgae studied here showed some distinct differences in response to environmentally relevant Cu levels.…”

Section: Discussionmentioning

confidence: 99%

“…A similar increase in rETR m at 7.4 nM Cu 2+ was reported in Monoraphidium sp. (Dauda and Lombardi 2023).…”

Section: Comparison Between the Photosynthesis Responses Of A Flexuos...mentioning

confidence: 99%

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Photosynthetic and antioxidant responses of Ankistrodesmus flexuosus and Curvastrum pantanale to environmentally relevant copper concentrations

Dauda,

Lombardi

2024

Physiologia Plantarum

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Since high concentrations of copper (Cu) are known to negatively affect algae, we investigated the effect of environmentally relevant concentrations of Cu on the metabolism and photosynthesis of microalgae. We investigated the photosynthesis and antioxidant responses of two green microalgae, Ankistrodesmus flexuosus and Curvastrum pantanale, to free Cu (1.7 nM–589.0 nM Cu2+), which included environmentally significant values (1.7 nM–21.4 nM Cu2+). The microalgae had similar growth rates at low Cu2+, but C. pantanale had higher growth rates at 7.4 and 21.4 nM Cu2+, and a higher Chl a/b ratio at 1.7–21.4 nM Cu2+. The Fv/Fo of A. flexuosus was not altered by Cu, whereas its relative maximum electron transport rate (rETRm) began to decrease at 7.4 nM Cu2+. The Fv/Fo and rETRm of C. pantanale increased at 21.4 nM Cu2+. The non‐photochemical quenching (NPQ) that was actively dissipated [Y(NPQ)] in A. flexuosus increased with Cu increase, whereas at 589.0 nM Cu2+, the NPQ of C. pantanale decreased and its passive energy dissipation [Y(NO)] increased. C. pantanale had higher photosynthesis at 1.7–21.4 nM Cu2+. Superoxide dismutase (SOD) activity increased in both microalgae at high Cu concentrations, at 21.4 nM Cu2+ for A. flexuosus, and at 589.0 nM Cu2+ for C. pantanale. Thus, environmentally relevant Cu concentrations can favor the survival of tolerant microalgae species, hence shifting the diversity of aquatic biota.

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Section: Discussionsupporting

confidence: 67%

Section: Discussionmentioning

confidence: 97%

Section: Discussionmentioning

confidence: 97%

Section: Discussionmentioning

confidence: 99%

“…A similar increase in rETR m at 7.4 nM Cu 2+ was reported in Monoraphidium sp. (Dauda and Lombardi 2023).…”

Section: Comparison Between the Photosynthesis Responses Of A Flexuos...mentioning

confidence: 99%

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Photosynthetic and antioxidant responses of Ankistrodesmus flexuosus and Curvastrum pantanale to environmentally relevant copper concentrations

Dauda,

Lombardi

2024

Physiologia Plantarum

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Low-dose copper and blue light increases the yield of value-added biomolecules in Kirchneriella contorta (Chlorophyceae)

Aoyagi,

Baracho,

Lombardi

2023

J Appl Phycol

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Microalgae are a natural source of valuable compounds with a wide range of applications. Given their physiological plasticity, strategies aiming at increasing the content of biomolecules have been proposed. In this study, low-dose copper and blue/red lights were combined and used as a manipulative strategy to induce biomolecule accumulation in Kirchneriella contorta (Schmidle). Cultures were exposed to a 1.6x10 − 9 to 1.7x10 − 8 mol L − 1 free copper (Cu 2+ ) concentration range under white light for 48 h.Afterwards, the white light was replaced with blue or red lights for up to 96 h. We evaluated population growth through growth rates, photosynthesis through pulse amplitude modulated uorescence (PAM) and biomolecules by quantifying chlorophyll a, carotenoids, carbohydrates and proteins. The results showed that at 3.8x10 − 9 mol L − 1 Cu 2+ and blue light, 2x more carotenoids, 4x more carbohydrates and 3x extra proteins were accumulated in the cells compared to the control. Among the light colors, the blue light most signi cantly interfered with the alga metabolism compared to the other colors. Although growth rates and quantum yields were not affected, non-photochemical quenching (NPQ) increased under blue light, showing that its higher energy compared to red and white lights may have impacted the photosynthetic apparatus. This study contributes to the biotechnology of microalgae by proposing a manipulative strategy that triggered the build-up of biomolecules in K. contorta.

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The responses and tolerance of photosynthetic system in Chlorella vulgaris to the pharmaceutical pollutant carbamazepine

Chang,

Wei,

Tian

et al. 2024

Chemosphere

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Environmentally relevant copper concentrations stimulate photosynthesis in Monoraphidium sp.

Cited by 5 publications

References 52 publications

Photosynthetic and antioxidant responses of Ankistrodesmus flexuosus and Curvastrum pantanale to environmentally relevant copper concentrations

Photosynthetic and antioxidant responses of Ankistrodesmus flexuosus and Curvastrum pantanale to environmentally relevant copper concentrations

Low-dose copper and blue light increases the yield of value-added biomolecules in Kirchneriella contorta (Chlorophyceae)

The responses and tolerance of photosynthetic system in Chlorella vulgaris to the pharmaceutical pollutant carbamazepine

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