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Chenping Xu and Beiquan Mou

content and F v /F m of common bean [ Phaseolus vulgaris L. ( Lima et al., 1999 )]. Similarly, this study indicated that photochemistry was not damaged by P deficiency in spinach. The inconsistency might be due to differences in species, severity, and

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Madhulika Sagaram and Jacqueline K. Burns

F v /F m : maximum efficiency of PSII photochemistry NPQ: total nonphotochemical heat dissipation = (F m  − F m' )/F m' NPQY: regulated heat dissipation = [1-(NOY+ Y(II))] NOY: unregulated heat dissipation: = 1/[NPQ + 1 + Y

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Jiaxin Li, Yingli Ma, and Yinfeng Xie

fluores cence parameters. All chlorophyll fluorescence parameters, including the maximal efficiency of PSII photochemistry ( F v / F m ), the effective efficiency of PSII photochemistry ( F v '/ F m '), actual PSII efficiency (Φ PSII ), photochemical

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Toshio Shibuya, Ryosuke Endo, Yuki Kitamura, Yoshiaki Kitaya, and Nobuaki Hayashi

under FL H or 6 d under ML, sample seedlings from each treatment group were taken to measure the net photosynthetic rate (P n ) and quantum yield of photosystem II photochemistry (Ф PSII ; Maxwell and Johnson, 2000 ). Because of the faster development

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Steven J. McArtney, John D. Obermiller, and Consuelo Arellano

peach have not been described. Photochemistry, chlorophyll fluorescence, and heat dissipation represent three competing de-excitation pathways for the light energy absorbed by chlorophyll in plant leaves ( Maxwell and Johnson, 2000 ). A reduction in the

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Zhengnan Yan, Long Wang, Jiaxi Dai, Yufeng Liu, Duo Lin, and Yanjie Yang

. Discussion Representing two classes of photosynthetic pigments in higher plants, chlorophylls and carotenoids absorb light energy and drive photochemistry ( Yamori, 2016 ; Yan et al., 2020 ). Leaf chlorophyll content of cucumber seedlings was significantly

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Wei Hu, Qing Di, Jingyi Wei, Jie Zhang, and Jia Liu

0 ), photochemical quenching coefficient (q p ), PSII photochemical maximum quantum efficiency (F v /F m ), chlorophyll fluorescence nonphotochemical quenching (NPQ), and actual quantum yield of PSII photochemistry (Φ PSII ). The specific measurement

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Qin Shi, Yunlong Yin, Zhiquan Wang, Wencai Fan, and Jianfeng Hua

photochemistry to thermal dissipation ( Chaves et al., 2003 ). For DS-R plants, reduced SLA on days 5 and 8 was attributed to a strategy that allowed the minimization of light absorption. Meanwhile, decreasing of leaf Chl t accompanied by F v / F m and φPSII

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Liyuan Huang, Jun Yuan, Hui Wang, Xiaofeng Tan, and Genhua Niu

differences were found in relative quantum efficiency of PSII photochemistry (ΦPSII) among Al concentration of 0.5, 1.25 m m, and the control. The nonphotochemical quenching (NPQ) was greatest in the 2.0 m m , followed by those in the control and 0.5 m m Al

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David A. Francko, Kenneth G. Wilson, Qingshun Q. Li, and Maria A. Equiza

evident. Chlorophyll fluorescence responds to changes in PSII photochemistry and provides a sensitive tool to evaluate plant responses to different environmental stresses. One fluorescence parameter widely used as stress indicator is Fv/Fm, the maximum