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Chenping Xu and Beiquan Mou

limited reports on chlorophyll content and photochemistry of photosystem II as affected by vermicompost. In this study, chlorophyll content increased under all vermicompost treatments, especially drench treatment. Vermicompost was also reported to increase

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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

Open access

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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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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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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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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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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Qing Xu, Shi-Rong Guo, He Li, Nan-Shan Du, Sheng Shu, and Jin Sun

determined by applying a blue saturation pulse (10 Hz). The maximum quantum yield of photosystem II (PSII) photochemistry, the F v /F m ratio, was determined as (F m –F 0 )/F m . Actinic illumination (260 µmol·m −2 ·s −1 ) was then switched on and saturating