Characterization of the layered SIF distribution through hyperspectral observation and SCOPE modeling for a subtropical evergreen forest

Zhu, Kai; Chen, Jinghua; Wang, Shaoqiang; Fang, Hongliang; Chen, Bin; Zhang, Leiming; Li, Yuelin; Zheng, Chen; Amir, Muhammad

doi:10.1016/j.isprsjprs.2023.05.014

Cited by 4 publications

(2 citation statements)

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“…Wang et al, 2022). Chlorophyll fluorescence calculated by multiple layers of canopy has higher accuracy in estimating whole canopy-scale carbon assimilation compared to chlorophyll fluorescence observed by sensors at the top of the canopy (Lu et al, 2020;Zhu et al, 2023). However, photosystem energy partitioning along the canopy top and bottom layers remains unclear.…”

Section: Introductionmentioning

confidence: 97%

“…The eddy covariance technique at the top the canopy can captures the gas exchange processes among leaves throughout the canopy (Dechant et al, 2020;. This results in a weak correlation between fluorescence and photosynthesis in a complex structured and dense canopy (Zhu et al, 2023). In addition, flag leaves at the canopy top receive high light intensity and serve as the main conduit for transporting photosynthetic products to the grains (Y.…”

Section: Introductionmentioning

confidence: 99%

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Vertical Variations of Photosystem Energy Partitioning in the Canopy of the Subtropical Cropland

Zhong,

Chi,

Huang

et al. 2024

JGR Biogeosciences

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Leaf‐level photosynthetic capacity exhibits vertical variations along the canopy profile. The dynamics of photosystem energy partitioning involved in dissipating absorbed light energy, namely photochemical yield (ΦP), fluorescence yield (ΦF), and the efficiency of non‐photochemical quenching yield (ΦN) in dissipating excess light energy as heat, along the vertical canopy profile remain unclear. Here, vertical variations in photosystem energy partitioning and photosynthetic nitrogen allocation were measured at different canopy positions of rice using active fluorescence detection and photosynthetic gas exchange measurement in subtropical southern China. We observed the decline in leaf nitrogen per leaf mass (Nmass) from the top to the bottom of the canopy. ΦP significantly decreased from vegetative growth stage to ripening stage, while ΦN showed an opposite trend. The top and bottom leaves had consistent relationships between photosynthetic nitrogen allocation and photosystem energy partitioning. Our findings reveal the vertical variations in physiological traits of subtropical rice.

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Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%