Photoprotective capacity of non-photochemical quenching in plants acclimated to different light intensities

Ware, Maxwell A.; Belgio, Erica; Ruban, Alexander V.

doi:10.1007/s11120-015-0102-4

Cited by 93 publications

(91 citation statements)

References 98 publications

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“…One important conclusion of this work is that regardless of the type of mutation, the light tolerance was solely determined by the amplitude of pNPQ Ware et al, 2014 ), plants must develop pNPQ of approximately 4, which is probably the top value for this species. As expected, plants acclimated to low light exhibited lower light tolerance (Ware et al, 2015a). The formation of a larger antenna causes higher excitation pressure, hence changing the steepness in the relationship between NPQ and tolerated light intensity.…”

Section: Protective Effectiveness Of Npqsupporting

confidence: 72%

Nonphotochemical Chlorophyll Fluorescence Quenching: Mechanism and Effectiveness in Protecting Plants from Photodamage

2016

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We review the mechanism underlying nonphotochemical chlorophyll fluorescence quenching (NPQ) and its role in protecting plants against photoinhibition. This review includes an introduction to this phenomenon, a brief history of major milestones in our understanding of NPQ, definitions, and a discussion of quantitative measurements of NPQ. We discuss the current knowledge and unknown aspects in the NPQ scenario, including the following: DpH, the proton gradient (trigger); lightharvesting complex II (LHCII), PSII light harvesting antenna (site); and changes in the antenna induced by DpH (change), which lead to the creation of the quencher. We conclude that the minimum requirements for NPQ in vivo are DpH, LHCII complexes, and the PsbS protein. We highlight the most important unknown in the NPQ scenario, the mechanism by which PsbS acts upon the LHCII antenna. Finally, we describe a novel, emerging technology for assessing the photoprotective "power" of NPQ and the important findings obtained through this technology.

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Section: Protective Effectiveness Of Npqsupporting

confidence: 72%

Nonphotochemical Chlorophyll Fluorescence Quenching: Mechanism and Effectiveness in Protecting Plants from Photodamage

2016

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“…In contrast to Zhefu802, Chl-8 had a higher qE and lower qI under both moderate and high light treatments. qE is major photoprotective component, whereas qI is mainly induced by the inactivation damage of PSII reaction centers and results from photoinhibition (Quaas et al, 2015; Ware et al, 2015). There were significantly lower levels of qI in Zhefu802 and Chl-8 under the moderate light treatment compared with the high light treatment.…”

Section: Discussionmentioning

confidence: 99%

Non-photochemical Quenching Plays a Key Role in Light Acclimation of Rice Plants Differing in Leaf Color

et al. 2017

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Non-photochemical quenching (NPQ) is an important photoprotective mechanism in rice; however, little is known regarding its role in the photosynthetic response of rice plants with differing in leaf color to different irradiances. In this study, two rice genotypes containing different chlorophyll contents, namely Zhefu802 (high chlorophyll) and Chl-8 (low chlorophyll), were subjected to moderate or high levels of light intensity at the 6-leaf stage. Chl-8 possessed a lower chlorophyll content and higher chlorophyll a:b ratio compared with Zhefu802, while Pn, Fv/Fm, and ΦPSII contents were higher in Chl-8. Further results indicated that no significant differences were observed in the activities of Rubisco, Mg2+-ATPase, and Ca2+-ATPase between these genotypes. This suggested that no significant difference in the capacity for CO2 assimilation exists between Zhe802 and Chl-8. Additionally, no significant differences in stomatal limitation were observed between the genotypes. Interestingly, higher NPQ and energy quenching (qE), as well as lower photoinhibitory quenching (qI) and production of reactive oxygen species (ROS) was observed in Chl-8 compared with Zhefu802 under both moderate and high light treatments. This indicated that NPQ could improve photosynthesis in rice under both moderate and high light intensities, particularly the latter, whereby NPQ alleviates photodamage by reducing ROS production. Both zeaxanthin content and the expression of PsbS1 were associated with the induction of NPQ under moderate light, while only zeaxanthin was associated with NPQ induction under high light. In summary, NPQ could improve photosynthesis in rice under moderate light and alleviate photodamage under high light via a decrease in ROS generation.

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“…There is a long history of treating "q I " or inhibitory quenching (Horton et al, 1996) as a component of non-photochemical quenching, in the broadest sense. Photoinactivation of PSII causes changes in PSII fluorescence emission variables, particularly increases in F 0 and F 0 ′ (Oxborough and Baker, 1997;Ware et al, 2015) that could overlap or interfere with changes provoked by induction of YNPQ (Kulk et al, 2012(Kulk et al, , 2013. Although neither F 0 nor F 0 ′ are explicitly included in calculation of YNPQ nor YNO, underlying changes in F 0 ′ could shift the level of steady state fluorescence under illumination, F S , which is part of the YNPQ and YNO parameters.…”

Section: Methodsmentioning

confidence: 99%

Phytoplankton σPSII and Excitation Dissipation; Implications for Estimates of Primary Productivity

Lavaud

Perkins

et al. 2018

Front. Mar. Sci.

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The effective absorption cross section for photochemistry of Photosystem II in the light (σ PSII ′ ) comprises the probability of light capture by Photosystem II and the quantum yield for subsequent photochemistry. σ PSII ′ is used to model photosynthesis and aquatic productivity, and phytoplankters regulate σ PSII ′ to mitigate over-or under-excitation of Photosystem II. We used diverse phytoplankton taxa to compare short and long term changes in σ PSII ′ with the induction of the yield of non-photochemical quenching (YNPQ) of chlorophyll fluorescence, a measure of regulated excitation dissipation. In two picocyanobacteria σ PSII ′ showed no decline upon induction of moderate YNPQ, above light levels sufficient for saturation of electron transport. In the eukaryotic chl a/b Ostreococcus and the chl a/c diatom Thalassiosira, induction of non-photochemical quenching was stronger after growth under saturating light, an acclimation attributable to increased xanthophyll cycle pigment content. Across short and longer-term light histories to induce or relax regulatory processes Ostreococcus and Thalassiosira showed proportional variations between the level of YNPQ and the down regulation of σ PSII ′ . The proportional down regulation of σ PSII ′ was, however, significantly smaller than the amplitude of YNPQ induction. For the eukaryotes we can predict changes in σ PSII ′ , useful for modeling electron transport, productivity and acclimation, from measures of YNPQ, which are accessible from fluorescence yield measures that do not include σ PSII ′ . This useful relation, however, does not extend to the tested prokaryotes, possibly as a result of differential violations of the rate constant assumptions that underlie the calculated YNPQ parameter.

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Photoprotective capacity of non-photochemical quenching in plants acclimated to different light intensities

Cited by 93 publications

References 98 publications

Nonphotochemical Chlorophyll Fluorescence Quenching: Mechanism and Effectiveness in Protecting Plants from Photodamage

Nonphotochemical Chlorophyll Fluorescence Quenching: Mechanism and Effectiveness in Protecting Plants from Photodamage

Non-photochemical Quenching Plays a Key Role in Light Acclimation of Rice Plants Differing in Leaf Color

Phytoplankton σPSII and Excitation Dissipation; Implications for Estimates of Primary Productivity

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