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Eleni M. Abraham, William A. Meyer, Stacy A. Bonos, and Bingru Huang

taken. Photochemical efficiency was expressed as chlorophyll fluorescence in the ratio of variable to maximum fluorescence (Fv/Fm). Single-leaf photosynthetic rate (Pn) and transpiration rate were measured with a portable gas exchange system (LI-6400

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Letizia Tozzini, Paolo Sabbatini, and G. Stanley Howell

. Measurements were performed at midday (from 1100 hr to 1300 hr ). Shoot mean P n was calculated averaging the measurements from the three different positions. Leaf photosynthetic efficiency was assessed measuring F v /F m (maximum photochemical efficiency

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Liang Cheng, Ning Zhang, and Bingru Huang

80 °C, samples were weighed a final time for DW. Leaf photochemical efficiency was estimated by measuring chlorophyll fluorescence expressed as the ratio of variable to maximum fluorescence ( F v / F m ) with a fluorescence induction monitor (OS 1FL

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Hongmei Du, Zhaolong Wang, Wenjuan Yu, and Bingru Huang

determine dry weight (DW). Leaf RWC was calculated as (FW – DW)/(TW – DW) × 100. Leaf photochemical efficiency was determined by measuring chlorophyll fluorescence of leaves, the ratio of variable fluorescence to maximal fluorescence (Fv/Fm), with a leaf

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Jianming Sun, Yiming Liu, Xianglin Li, and Bingru Huang

, each sample with five leaves randomly selected from each pot. Leaf photochemical efficiency was determined during the 12 d of treatment period (3–15 Nov. 2014) with a chlorophyll fluorometer (OS1-FL; Opti-Science, Hudson, NH). It was expressed as the

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Yan Xu and Bingru Huang

Agrostis species was associated with changes in the three major senescence-related hormones (ethylene, ABA, and cytokinins). Turf quality, photochemical efficiency, and the content of two pigments (chlorophyll and carotenoid) were measured to evaluate the

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Xiuju Bian, Emily Merewitz, and Bingru Huang

photochemical efficiency were determined as drought stress indicators. Turf quality was rated visually as an integral of grass color, uniformity, and density on a 0 to 9 scale, where 0 = brown, dead turf; and 9 = dark green and dense turf ( Beard, 1973 ). The

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Qi Chai, Fang Jin, Emily Merewitz, and Bingru Huang

membrane stability [electrolyte leakage (EL)], leaf chlorophyll content (Chl), and leaf photochemical efficiency (Fv/Fm) were measured at 0, 5, 10, 15, and 20 d of drought stress and 3 and 7 d of re-watering. During 3 and 7 d of re-watering, these

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

′, Fs, and Fm′ are the minimal, steady-state, and maximal fluorescence level in illuminated leaves, respectively. These fluorescence parameters were used to calculate the following: 1) the actual photochemical efficiency of PSII, ФPSII = (Fm′ − Fs

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Chenping Xu and Beiquan Mou

. Five weeks after transplanting in each trial, leaf maximum photochemical efficiency (F v /F m ), photochemical yield [Y(II)], and ETR were measured with a fluorometer (MINI-PAM-II fluorometer; Heinz Walz, Effeltrich, Germany) on the first, second, and