Photoprotective, excited-state quenching mechanisms in diverse photosynthetic organisms

Magdaong, Nikki Cecil M.; Blankenship, Robert E.

doi:10.1074/jbc.tm117.000233

Cited by 52 publications

(37 citation statements)

References 99 publications

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“…The regulation of the XC and mediated NPQ at the molecular level has been the object of intense research in various photosynthetic organisms (see the recent syntheses by Niyogi and Truong , Demmig‐Adams et al. , Goss and Lepetit , Magdaong and Blankenship , Pinnola and Bassi ). In microalgae, its peculiarities have been extensively studied in green representatives (Finazzi and Minagawa , Erickson et al.…”

Section: What Is the Xanthophyll Cycle (Xc)‐related Nonphotochemical mentioning

confidence: 99%

Diversity in Xanthophyll Cycle Pigments Content and Related Nonphotochemical Quenching (NPQ) Among Microalgae: Implications for Growth Strategy and Ecology

Lacour

Babin

Lavaud

2020

Journal of Phycology

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Xanthophyll cycle‐related nonphotochemical quenching (NPQ), which is present in most photoautotrophs, allows dissipation of excess light energy. Xanthophyll cycle‐related NPQ depends principally on xanthophyll cycle pigments composition and their effective involvement in NPQ. Xanthophyll cycle‐related NPQ is tightly controlled by environmental conditions in a species‐/strain‐specific manner. These features are especially relevant in microalgae living in a complex and highly variable environment. The goal of this study was to perform a comparative assessment of NPQ ecophysiologies across microalgal taxa in order to underline the specific involvement of NPQ in growth adaptations and strategies. We used both published results and data acquired in our laboratory to understand the relationships between growth conditions (irradiance, temperature, and nutrient availability), xanthophyll cycle composition, and xanthophyll cycle pigments quenching efficiency in microalgae from various taxa. We found that in diadinoxanthin‐containing species, the xanthophyll cycle pigment pool is controlled by energy pressure in all species. At any given energy pressure, however, the diatoxanthin content is higher in diatoms than in other diadinoxanthin‐containing species. XC pigments quenching efficiency is species‐specific and decreases with acclimation to higher irradiances. We found a clear link between the natural light environment of species/ecotypes and quenching efficiency amplitude. The presence of diatoxanthin or zeaxanthin at steady state in all species examined at moderate and high irradiances suggests that cells maintain a light‐harvesting capacity in excess to cope with potential decrease in light intensity.

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Section: What Is the Xanthophyll Cycle (Xc)‐related Nonphotochemical mentioning

confidence: 99%

Diversity in Xanthophyll Cycle Pigments Content and Related Nonphotochemical Quenching (NPQ) Among Microalgae: Implications for Growth Strategy and Ecology

Lacour

Babin

Lavaud

2020

Journal of Phycology

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“…Additionally, it was shown that in the presence of high amounts of Ddx cycle pigments, for example, in diatom cells cultivated at higher light intensities, a large part of the total Ddx/Dtx pool is located not only transiently but stable within the lipid phase of the membrane (Lepetit et al, ). However, a part of the total Dtx in diatoms, similarly to Zx in vascular plants and green algae, is also bound to FCP complexes, inducing detachment and aggregation of the FCPs, which finally results in the formation of the quenching sites postulated by the recent nonphotochemical quenching (NPQ) models (Magdaong & Blankenship, ).…”

Section: Introductionmentioning

confidence: 99%

Diadinoxanthin de‐epoxidation as important factor in the short‐term stabilization of diatom photosynthetic membranes exposed to different temperatures

Bojko

Olchawa-Pajor

Goss

et al. 2018

Plant Cell & Environment

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The importance of diadinoxanthin (Ddx) de‐epoxidation in the short‐term modulation of the temperature effect on photosynthetic membranes of the diatom Phaeodactylum tricornutum was demonstrated by electron paramagnetic resonance (EPR), Laurdan fluorescence spectroscopy, and high‐performance liquid chromatography. The 5‐SASL spin probe employed for the EPR measurements and Laurdan provided information about the membrane area close to the polar head groups of the membrane lipids, whereas with the 16‐SASL spin probe, the hydrophobic core, where the fatty acid residues are located, was probed. The obtained results indicate that Ddx de‐epoxidation induces a two component mechanism in the short‐term regulation of the membrane fluidity of diatom thylakoids during changing temperatures. One component has been termed the “dynamic effect” and the second the “stable effect” of Ddx de‐epoxidation. The “dynamic effect” includes changes of the membrane during the time course of de‐epoxidation whereas the “stable effect” is based on the rigidifying properties of Dtx. The combination of both effects results in a temporary increase of the rigidity of both peripheral and internal parts of the membrane whereas the persistent increase of the rigidity of the hydrophobic core of the membrane is solely based on the “stable effect.”

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“…Similarly, a previous study found that the reduced leaf photosynthesis upon sulfur treatment was due to non-stomatal limitation, as the reduction of photochemical reactions causes more energy to be dissipated as heat [13]. NPQ represent the response of the photosynthetic membrane to excess light intensity, it is crucial for balancing the energy distribution between growth and stress response by regulating photoinhibition and photoprotection [11,[21][22][23]. In the present study, the soil salinity pretreatment could induce PSI non-photochemical energy dissipation owing to the donor-side limitation and regulated energy dissipation in PSII, and maintained higher NPQ at PSII.…”

Section: Discussionmentioning

confidence: 91%

Photosynthetic Response Mechanism of Soil Salinity-Induced Cross-Tolerance to Subsequent Drought Stress in Tomato Plants

Yang

Chen

et al. 2020

Plants

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Soil salinization and water shortage cause ion imbalance and hyperosmoticity in plant cells, adversely impairing photosynthesis efficiency. How soil salinity-induced photosynthetic acclimation influences the cross-tolerance to drought conditions represents a promising research topic. This study was to reveal the photosynthetic mechanism of soil salinity-induced resistance to the subsequent drought stress in tomato leaves through comprehensive photosynthesis-related spectroscopy analysis. We conducted soil salinity pretreatment and subsequent drought stress experiments, including irrigation with 100 mL water, 100 mL 100 mM NaCl solution (NaCl100), 50 mL water, and 50 mL 100 mM NaCl solution (NaCl50) for five days, followed by five-day drought stress. The results showed that soil salinity treatment by NaCl decreased the rate of photosynthetic gas exchange but enhanced CO 2 assimilation, along with photosystem II [PS(II)] and photosystem I [PS(I)] activity and photochemical efficiency in tomato plants compared with water pretreatment after subsequent drought stress. NaCl100 and NaCl50 had the capacity to maintain non-photochemical quenching (NPQ) of chlorophyll fluorescence and the cyclic electron (CEF) flow around PSI in tomato leaves after being subjected to subsequent drought stress, thus avoiding the decrease of photosynthetic efficiency under drought conditions. NaCl100 and NaCl50 pretreatment induced a higher proton motive force (pmf) and also alleviated the damage to the thylakoid membrane and adenosine triphosphate (ATP) synthase of tomato leaves caused by subsequent drought stress. Overall, soil salinity treatment could enhance drought resistance in tomato plants by inducing NPQ, maintaining CEF and pmf that tradeoff between photoprotection and photochemistry reactions. This study also provides a photosynthetic perspective for salt and drought cross-tolerance.

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Photoprotective, excited-state quenching mechanisms in diverse photosynthetic organisms

Abstract: Light-harvesting complexes (LHCs) serve a dual role in photosynthesis, depending on the prevailing light conditions.

Cited by 52 publications

References 99 publications

Diversity in Xanthophyll Cycle Pigments Content and Related Nonphotochemical Quenching (NPQ) Among Microalgae: Implications for Growth Strategy and Ecology

Diversity in Xanthophyll Cycle Pigments Content and Related Nonphotochemical Quenching (NPQ) Among Microalgae: Implications for Growth Strategy and Ecology

Diadinoxanthin de‐epoxidation as important factor in the short‐term stabilization of diatom photosynthetic membranes exposed to different temperatures

Photosynthetic Response Mechanism of Soil Salinity-Induced Cross-Tolerance to Subsequent Drought Stress in Tomato Plants

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