Differential photosynthetic responses of marine planktonic and benthic diatoms to ultraviolet radiation under various temperature regimes

Wu, Yaping; Yue, Furong; Xu, Juntian; Beardall, John

doi:10.5194/bg-14-5029-2017

Cited by 14 publications

(12 citation statements)

References 44 publications

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“…The extent of the effect of UV radiation shows substantial variation among individual organisms. 80,242 In nature, the effects are dependent on the level of exposure to UV radiation, but they are also modulated by temperature 239,242 and nutrients (section 3.3). Since sensitivity to these effects also varies between species and with environment, exposure to UV radiation has the potential to change the composition of communities.…”

Section: Primary Producersmentioning

confidence: 99%

The interactive effects of stratospheric ozone depletion, UV radiation, and climate change on aquatic ecosystems

Williamson

Neale

Hylander

et al. 2019

Photochem Photobiol Sci

128

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Section: Primary Producersmentioning

confidence: 99%

The interactive effects of stratospheric ozone depletion, UV radiation, and climate change on aquatic ecosystems

Williamson

Neale

Hylander

et al. 2019

Photochem Photobiol Sci

128

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“…Given the importance of diatoms to global primary production, how these organisms respond to nutrient limitation and UV radiation is of great importance. Previous work on nutrient limitation and UVR interactions under N and P limitation has been carried out on a green alga (35,42) However, the one study showing that nutrient limitation reduced the inhibitory effects of UV and high PAR was on an Antarctic diatom, in which the responses could be complicated by the effect of low temperature which may inhibit repair at low temperature (43,44). Our results revealed that photoinhibition induced by high light and UV radiation was more severe in diatom cells that were grown under limited nitrogen supply (Fig.…”

Section: Discussionmentioning

confidence: 99%

Nitrogen Limitation Decreases the Repair Capacity and Enhances Photoinhibition of Photosystem II in a Diatom

Lan²,

Zhang³

et al. 2021

Photochem & Photobiology

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Macronutrient limitation and increased solar exposure coincide with ocean warming‐enhanced stratification, with consequences for phytoplankton within the upper mixing layer. In this study, we grew a diatom, Thalassiosira punctigera, under nitrogen‐limited and replete conditions for more than 14 generations and investigated both the biochemical composition of treated cells and their photochemical responses to high light and UV exposure. The photosynthetic pigment and the particulate organic nitrogen (PON) content significantly decreased in the low nitrate grown cells, with drastic decline of the absorption of UV absorbing compounds. Under an acute exposure to high light or UV radiation, we observed a significant decline in the photochemical yield along with an increase of nonphotosynthetic quenching (NPQ), with the former lowered and the latter raised in the low‐nitrogen grown cells. The results reveal a decreased repair rate and enhanced photoinhibition of the diatom under nitrogen limitation when exposed to increased levels of light and UV radiation, suggesting a higher vulnerability of the diatom phytoplankton under influences of oceanic global change.

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“…The rate of UV‐induced damage to PSII ( k , min −1 ) and the repair rate ( r , min −1 ) under light exposure were calculated using the following Nonline fitting formula :

\frac{P_{t}}{P_{0}} = \frac{r}{k + r} + \frac{k}{k + r} e^{- (k + r) t},

where P 0 is the initial effective quantum yield, and P t is the effective quantum yield after t minutes.…”

Section: Methodsmentioning

confidence: 99%

“…The recovery rate ( R , min −1 ) of P. yezoensis under dim light conditions was calculated by a fitting equation :

y = y_{0} + c false(1 - e^{- α t} false) .

…”

Section: Methodsmentioning

confidence: 99%

Different Photosynthetic Responses of Pyropia yezoensis to Ultraviolet Radiation Under Changing Temperature and Photosynthetic Active Radiation Regimes

Bao

et al. 2019

Photochem & Photobiology

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Macroalgae play a crucial role in coastal marine ecosystems, but they are also subject to multiple challenges due to tidal and seasonal alterations. In this work, we investigated the photosynthetic response of Pyropia yezoensis to ultraviolet radiation (PAR: 400–700 nm; PAB: 280–700 nm) under changing temperatures (5, 10 and 15°C) and light intensities (200, 500 and 800 μmol photons m−2 s−1). Under low light intensity (200 μmol photons m−2 s−1), P. yezoensis showed the lowest sensitivity to ultraviolet radiation, regardless of temperature. However, higher temperatures inhibited the repair rates (r) and damage rates (k) of photosystem II (PSII) in P. yezoensis. However, under higher light intensities (500 and 800 μmol photons m−2 s−1), P. yezoensis showed higher sensitivity to UV radiation. Both r and the ratio of repair rate to damage rate (r:k) were significantly inhibited in P. yezoensis by PAB, regardless of temperature. In addition, higher temperatures significantly decreased the relative UV‐inhibition rates, while an increased carbon fixation rate was found. Our study suggested that higher light intensities enhanced the sensitivity to UV radiation, while higher temperatures could relieve the stress caused by high light intensity and UV radiation.

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Differential photosynthetic responses of marine planktonic and benthic diatoms to ultraviolet radiation under various temperature regimes

Cited by 14 publications

References 44 publications

The interactive effects of stratospheric ozone depletion, UV radiation, and climate change on aquatic ecosystems

The interactive effects of stratospheric ozone depletion, UV radiation, and climate change on aquatic ecosystems

Nitrogen Limitation Decreases the Repair Capacity and Enhances Photoinhibition of Photosystem II in a Diatom

Different Photosynthetic Responses of Pyropia yezoensis to Ultraviolet Radiation Under Changing Temperature and Photosynthetic Active Radiation Regimes

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