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- W2156336918 abstract "Summary Terrestrial laser scanning ( TLS ) data allow spatially explicit ( x , y , z ) laser return intensities to be recorded throughout a plant canopy, which could considerably improve our understanding of how physiological processes vary in three‐dimensional space. However, the utility of TLS data for the quantification of plant physiological properties remains largely unexplored. Here, we test whether the laser return intensity of green (532‐nm) TLS correlates with changes in the de‐epoxidation state of the xanthophyll cycle and photoprotective non‐photochemical quenching ( NPQ ), and compare the ability of TLS to quantify these parameters with the passively measured photochemical reflectance index ( PRI ). We exposed leaves from five plant species to increasing light intensities to induce NPQ and de‐epoxidation of violaxanthin (V) to antheraxanthin (A) and zeaxanthin (Z). At each light intensity, the green laser return intensity ( GLRI ), narrowband spectral reflectance, chlorophyll fluorescence emission and xanthophyll cycle pigment composition were recorded. Strong relationships between both predictor variables ( GLRI , PRI ) and both explanatory variables ( NPQ , xanthophyll cycle de‐epoxidation) were observed. GLRI holds promise to provide detailed (mm) information about plant physiological status to improve our understanding of the patterns and mechanisms driving foliar photoprotection. We discuss the potential for scaling these laboratory data to three‐dimensional canopy space." @default.
- W2156336918 created "2016-06-24" @default.
- W2156336918 creator A5040981993 @default.
- W2156336918 creator A5057948380 @default.
- W2156336918 creator A5067362495 @default.
- W2156336918 creator A5080383857 @default.
- W2156336918 creator A5080665988 @default.
- W2156336918 creator A5089220129 @default.
- W2156336918 date "2013-08-29" @default.
- W2156336918 modified "2023-09-23" @default.
- W2156336918 title "Assessing leaf photoprotective mechanisms using terrestrial Li <scp>DAR</scp> : towards mapping canopy photosynthetic performance in three dimensions" @default.
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