Non-Photochemical Quenching. A Response to Excess Light Energy

Müller, Patricia; Li, Xiaoping; Niyogi, Krishna

doi:10.1104/pp.125.4.1558

Cited by 2,459 publications

(2,072 citation statements)

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“…However, these photosynthetic parameters can be also affected by other mechanisms. In particular, different components of NPQ can be affected by the pH-dependent protonation of PsbS proteins [37,111], state transition [37,113,114], and photoinhibition [115]. The contribution of these processes to the total NPQ depends on environmental conditions [115,116] and the time of their development [117].…”

Section: Conditions Of Measurementmentioning

confidence: 99%

“…This index, which is related to the fast transition in the xanthophyll cycle, is based on the rapid decrease of reflectance at 531 nm that is caused by the dissipation of light energy associated with xanthophyll de-epoxidation [26,36]. It is known that the de-epoxidation of xanthophylls plays an important role in the increase of nonphotochemical quenching of fluorescence of chlorophyll (NPQ) under stress conditions [12,37]. Thus, it can be expected that PRI is strongly connected with NPQ (and other photosynthetic parameters) under different environmental conditions.…”

Section: Introductionmentioning

confidence: 99%

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Connection of the Photochemical Reflectance Index (PRI) with the Photosystem II Quantum Yield and Nonphotochemical Quenching Can Be Dependent on Variations of Photosynthetic Parameters among Investigated Plants: A Meta-Analysis

Sukhova

Sukhov

2018

Remote Sensing

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Abstract:The development of spectral methods of remote sensing, including measurement of a photochemical reflectance index (PRI), is a prospective trend in precision agriculture. There are many works which have investigated the connection between photosynthetic parameters and PRI; however, their results varied and were sometimes contradictory. For this paper, we performed a meta-analysis of works in this field. Here, only linear correlations of PRI with photosynthetic parameters-including quantum yield of photosystem II (∆F/Fm'), nonphotochemical quenching of chlorophyll fluorescence (NPQ), and light use efficiency (LUE)-were investigated. First, it was shown that the correlations were dependent on conditions of PRI measurements (leaf or canopy; artificial light or sunlight). Second, it was shown that a minimal level of the photosynthetic stress, and the variation of this level among investigated plants, can influence the linear correlation of PRI with ∆F/Fm' and NPQ; the effect was dependent on conditions of measurements. In contrast, the distribution of LUE among plants did not influence its correlation with PRI. Thus, the meta-analysis shows that the distribution of photosynthetic parameters among investigated plants can be an important factor that influences the efficiency of remote sensing on the basis of the PRI measurement.

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Section: Conditions Of Measurementmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Connection of the Photochemical Reflectance Index (PRI) with the Photosystem II Quantum Yield and Nonphotochemical Quenching Can Be Dependent on Variations of Photosynthetic Parameters among Investigated Plants: A Meta-Analysis

Sukhova

Sukhov

2018

Remote Sensing

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“…Only monomers of LHCII are degraded upon photoacclimation to high light (17), indicating a possible site of control at the trimer/ monomer conversion. LHCII trimers have also been suggested to be involved in the inducible increase in the level of energy dissipation that gives rise to the nonphotochemical quenching of chlorophyll fluorescence (NPQ) and which provides protection against photodamage (18,19). The major proportion of NPQ, called qE, has been shown to be obligatorily dependent on the transthylakoid ∆pH and controlled by the deepoxidation of the carotenoid violaxanthin into zeaxanthin through the action of the xanthophyll cycle (20,21).…”

mentioning

confidence: 99%

The Functional Significance of the Monomeric and Trimeric States of the Photosystem II Light Harvesting Complexes

2003

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The main light harvesting complex of photosystem II in plants, LHCII, exists in a trimeric state. To understand the biological significance of trimerization, a comparison has been made been LHCII trimers and LHCII monomers prepared by treatment with phospholipase. The treatment used caused no loss of chlorophyll, but there was a difference in carotenoid composition, together with the previously observed alterations in absorption spectrum. It was found that, when compared to monomers, LHCII trimers showed increased thermal stability and a reduced structural flexibility as determined by the decreased rate and amplitude of fluorescence quenching in low-detergent concentration. It is suggested that LHCII should be considered as having two interacting domains: the lutein 1 domain, the site of fluorescence quenching [Wentworth et al. (2003) J. Biol. Chem. 278, 21845-21850], and the lutein 2 domain. The lutein 2 domain faces the interior of the trimer, the differences in absorption spectrum and carotenoid binding in trimers compared to monomers indicating that the trimeric state modulates the conformation of this domain. It is suggested that the lutein 2 domain controls the conformation of the lutein 1 domain, thereby providing allosteric control of fluorescence quenching in LHCII. Thus, the pigment configuration and protein conformation in trimers is adapted for efficient light harvesting and enhanced protein stability. Furthermore, trimers exhibit the optimum level of control of energy dissipation by modulating the development of the quenched state of the complex.

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“…Protection against photodamage would be particularly important if the litter reduces the carboxylation capacity of the mosses. Without high NPQ, electron flow in the new and high light environment would exceed the needs for carbon fixation and other metabolic processes leading to the formation of reactive oxygen species and cellular damage (Müller et al, 2001).…”

Section: Effects Of Litter Cover On Chlorophyll a Fluorescence Paramementioning

confidence: 99%

Bromus tectorum litter alters photosynthetic characteristics of biological soil crusts from a semiarid shrubland

Serpe

Roberts

Eldridge

et al. 2013

Soil Biology and Biochemistry

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Invasion by the exotic annual grass Bromus tectorum has increased the cover and connectivity of fine litter in the sagebrush steppes of western North America. This litter tends to cover biological soil crusts, which could affect their metabolism and growth. To investigate this possible phenomenon, biological soil crusts dominated by either the moss Bryum argenteum or the lichen Diploschistes muscorum were covered with B. tectorum litter (litter treatment) or left uncovered (control treatment) and exposed to natural field conditions. After periods of five and ten months, we removed the litter and compared the photosynthetic performance of biological soil crusts from the two treatments. Litter induced photosynthetic changes in our samples. In both B. argenteum and D. muscorum, biological soil crusts that had been covered with litter for ten months had lower rates of gross photosynthesis and lower chlorophyll content than control samples. Similarly in both biological soil crust types, litter reduced the rate of dark respiration. For D. muscorum, the reduction in dark respiration fully compensated for the decrease in gross photosynthesis, resulting in similar values of net photosynthesis in the two treatments. In contrast, for B. argenteum, net photosynthesis was four-times greater in the control than the litter treatment. Also under litter cover, D. muscorum showed three common adaptations to shade conditions: a decrease in the light compensation point, in the light intensity needed to achieve 95% of maximal net photosynthesis, and in the chlorophyll a/b ratio. None of these changes was apparent in B. argenteum. Overall, our results indicate that photosynthetic responses to the presence of litter varied among species of the crust biota and that the litter can reduce the photosynthetic capacity of biological soil crusts. These results help to explain field observations of decreases in biological soil crust cover and changes in biological soil crust composition with increases in litter cover, and suggest that the landscape-wide invasion by B. tectorum may have substantial effects on biological soil crust performance and therefore their capacity to function in semiarid shrublands.Keywords: Biological soil crusts, Bromus tectorum, Bryum argenteum, Diploschistes muscorum, lichens, litter, mosses, photosynthesis, semiarid environments, sagebrush steppe Abbreviations: Biological soil crusts (biocrusts), ΔF/F m ', photosystem II operating efficiency, F v /F m , maximum quantum efficiency of photosystem II photochemistry; LCP, light compensation point, NPQ, non-photochemical quenching; PPFR 95% , light intensity necessary to achieve 95% of maximal net photosynthesis 2

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Non-Photochemical Quenching. A Response to Excess Light Energy

Cited by 2,459 publications

References 50 publications

Connection of the Photochemical Reflectance Index (PRI) with the Photosystem II Quantum Yield and Nonphotochemical Quenching Can Be Dependent on Variations of Photosynthetic Parameters among Investigated Plants: A Meta-Analysis

Connection of the Photochemical Reflectance Index (PRI) with the Photosystem II Quantum Yield and Nonphotochemical Quenching Can Be Dependent on Variations of Photosynthetic Parameters among Investigated Plants: A Meta-Analysis

The Functional Significance of the Monomeric and Trimeric States of the Photosystem II Light Harvesting Complexes

Bromus tectorum litter alters photosynthetic characteristics of biological soil crusts from a semiarid shrubland

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