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David A. Felicetti and Larry E. Schrader

increase indicates a need for increased nonphotochemical quenching capacity, which suggests that the SB peel types received more irradiation than the NB peel type. However, the relative lack of differences among the SB peel types suggests 1) there is no

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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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Zhong-Hua Bian, Rui-Feng Cheng, Qi-Chang Yang, Jun Wang, and Chungui Lu

photosynthetic system II (PSII) ( Huner et al., 1998 ; Lichtenthaler et al., 2005 ): the maximal quantum yield ( F v / F m ) = ( F m − F o )/ F m ; the effective quantum yield (Φ PSII ) = ( F m ′ − F s )/ F m ′; nonphotochemical quenching (qN) = ( F m − F m

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Theoharis Ouzounis, Eva Rosenqvist, and Carl-Otto Ottosen

nonphotochemical quenching (NPQ) of chlorophyll fluorescence], which possibly limits the formation of chlorophyll triplets and prevents ROS from being produced ( Demmig-Adams and Adams, 1992 ). Lutein and β-carotene are also key components of the light

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Kevin M. Folta and Kayla Shea Childers

harvesters of photons. These energized compounds and the processes they drive (photosynthesis, nonphotochemical quenching) affect metabolism and therefore develop metabolic product states that are sensed and used as information within the cell. Retrograde

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Jiaxin Li, Yingli Ma, and Yinfeng Xie

quenching (qP), and nonphotochemical quenching (NPQ), were measured using a chlorophyll fluorescence imager (CF Imager; Techologica, Essex, UK). All fluorescence measurements were performed five times following the first NPs treatment, once every 10 d. The