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Tessa Pocock

the lumen (ΔpH) during PSN also senses changes in light, regulates electron transport, and modulates nonphotochemical quenching (NPQ) in PSII ( Foyer et al., 2012 ; Kono and Terashima, 2014 ). The photoprotective xanthophyll cycle is a significant

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Guoting Liang, Junhui Liu, Jingmin Zhang, and Jing Guo

coefficient: q P = ( F M ' – F S )/( F M ' – F 0 '); nonphotochemical quenching: NPQ = ( F M – F M ')/ F M '; and effective quantum yield of PSII photochemistry: Ф PSII = ( F M ' – F S )/ F M ' ( Liang et al., 2017 ). Measurement of antioxidant enzyme

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Cristhian Camilo Chávez-Arias, Sandra Gómez-Caro, and Hermann Restrepo-Díaz

) (F v /F m ), photochemical quenching (qP), and a high nonphotochemical quenching (NPQ) have been reported under waterlogging conditions ( Liu et al., 2014 ; Wu et al., 2015 ). Moderate periods of hypoxia (6–8 d) also have caused a reduction in plant

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Lingyun Yuan, Yujie Yuan, Shan Liu, Jie Wang, Shidong Zhu, Guohu Chen, Jinfeng Hou, and Chenggang Wang

)/Fm′; 2) the photochemical fluorescence quenching coefficient, qP = (Fm′ − Fs)/(Fm′ − Fo′); 3) nonphotochemical quenching coefficient, qN = (Fm − Fm′)/(Fm′ − Fo′); and 4) the maximal photochemical efficiency of PSII, Fv/Fm = (Fm − Fo)/Fm. Isolation of

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Yong In Kuk and Ji San Shin

min to fully open all photosystem (PS) II reaction centers (oxidize Qa), and also to dissipate the transthylakoid pH gradient to eliminate nonphotochemical quenching ( Krause et al., 1983 ). A minimal fluorescence yield, F 0 , was obtained upon

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Mengyang Liu, Yin Lu, Shan Wang, Fang Wu, Jingrui Li, Yanhua Wang, Jianjun Zhao, and Shuxing Shen

yield of light-induced nonphotochemical quenching Y (NPQ) and quantum yield of nonregulated energy dissipation Y (NO) ( Kramer et al., 2004 ). Although ΦII was lower in hy than those in WT, Y (NPQ) was much higher than WT ( Table 2 ). Table 2

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Mark W. Farnham and Dean A. Kopsell

integral subunit of light-harvesting complexes in photosynthesis. In plant mutants void of xanthophyll cycle carotenoids, lutein functions in nonphotochemical quenching as a photoprotectant against oxidative damage ( Niyogi et al., 1997 ). The only previous

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Jinhong Yuan, Man Xu, Wei Duan, Peige Fan, and Shaohua Li

transport and quenching of chlorophyll fluorescence. BBA-Gen Subjects 990 87 92 Horton, P. Ruban, A.V. Walters, R.G. 1994 Regulation of light harvesting in green plants (indication by nonphotochemical quenching of chlorophyll fluorescence) Plant Physiol. 106

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Jack Olson and Matthew Clark

. Chl a / b are essential pigments in plants for harvesting light used in photosynthesis to produce energy, and carotenoids are essential for photoprotection of chloroplast photosystems via nonphotochemical quenching ( Bartley and Scolnik, 1995

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Lie Li, Yu-xin Tong, Jun-ling Lu, Yang-mei Li, and Qi-chang Yang

PSII quantum yield (F v /F m ), the efficiency of excitation capture by the open PSII center (F v ′/F m ′), actual photochemical quantum efficiency (Φ PSII ), electron transfer rate (ETR), photochemical quenching (qP), and nonphotochemical quenching