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Shuyang Zhen and Marc W. van Iersel

, and are thus unable to use the absorbed light for photochemistry ( Baker, 2008 ; Maxwell and Johnson, 2000 ). Fig. 2. Light response curves of quantum yield of photosystem II (Φ PSII ) ( A – C ), linear electron transport rate (ETR) ( D – F ), and non

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Geoffrey Weaver and Marc W. van Iersel

photochemical efficiency. Combined with PPFD , Φ PSII is used to calculate the rate of linear electron transport through PSII (the ETR), an estimate of the overall rate of the light reactions of photosynthesis ( Baker and Rosenqvist, 2004 ; Genty et al., 1989

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Alexandra García-Castro, Astrid Volder, Hermann Restrepo-Diaz, Terri W. Starman, and Leonardo Lombardini

(Vc max ), rate of photosynthetic electron transport [ J (based on NADPH requirement)], TPU, light respiration ( R l ), and mesophyll conductance ( g m ) were obtained by fitting data to the model described by Sharkey et al. (2007) . In light

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

·L −1 metamitron. The maximum potential quantum efficiency of photosystem II (PSII) (Fv/Fm), quantum photosynthetic yield of PSII (ΦPSII), and estimated relative electron transport rate (ETR) were measured on four leaves on each tree. Lower case letters

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Meijun Zhang, Duanduan Zhao, Zengqiang Ma, Xuedong Li, and Yulan Xiao

were the same as the first experiment for the PM and PA treatments, respectively. The experiment was conducted once. Chlorophyll content, the ratio of variable to maximum chlorophyll fluorescence (F v /F m ), and electron transport rate (ETR) were not

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Shuang Han, Jiafu Jiang, Huiyun Li, Aiping Song, Sumei Chen, and Fadi Chen

., 2002 ), since this technique delivers information regarding the saturation characteristics of electron transport, as well as being able to quantify overall photosynthetic performance ( Ralph and Gademann, 2005 ). A clear effect of low light intensity

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Marc W. van Iersel, Geoffrey Weaver, Michael T. Martin, Rhuanito S. Ferrarezi, Erico Mattos, and Mark Haidekker

estimate electron transport rate through PSII ( Baker and Rosenqvist, 2004 ; Genty et al., 1989 ). Because chlorophyll fluorescence is relatively easy to measure and provides detailed physiological information, such measurements can be a valuable tool to

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Chenping Xu and Beiquan Mou

; Konica Minolta Sensing, Tokyo, Japan). Leaf maximum photochemical efficiency (F v /F m ), photochemical yield [Y(II)] and electron transport rate (ETR) were measured with a fluorometer (MINI-PAM-II; Heinz Walz, Effeltrich, Germany) on the four largest

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Yuting Meng, Boling Liu, Ping Zhang, Ping Cui, Yuguang Song, Nianwei Qiu, Guoliang Han, and Feng Zhou

apparatus, inhibition of PSII activity, thereby reducing the rate of photosynthetic electron transport and the carbon assimilation ability ( Fig. 5 and Fig. 6 ). Our results showed that BDE-47 treatments notably reduced PI abs , DF , F v / F m , and the

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Chenping Xu and Beiquan Mou

: soil amended with 5% or 10% (v/v) vermicompost. Fig. 6. Effect of vermicompost on spinach leaf photochemical efficiency (F v /F m ; A ), photochemical yield [Y(II); B ], and electron transport rate (ETR; C ) 35 d after transplanting. The values are