Assessing photosynthetic efficiency in an experimental mangrove canopy using remote sensing and chlorophyll fluorescence

Caroline J. Nichol; Uwe Rascher; Shizue Matsubara; Barry Osmond

doi:10.1007/s00468-005-0005-7

Assessing photosynthetic efficiency in an experimental mangrove canopy using remote sensing and chlorophyll fluorescence

Caroline J. Nichol^*, Uwe Rascher, Shizue Matsubara, Barry Osmond

^*Corresponding author for this work

Division of Plant Sciences

Research output: Contribution to journal › Article › peer-review

70 Citations (Scopus)

Abstract

This study examined the ability of the photochemical reflectance index (PRI) to track changes in effective quantum yield (ΔF/F _m′), non-photochemical quenching (NPQ), and the xanthophyll cycle de-epoxidation (DPS) in an experimental mangrove canopy. PRI was correlated with (ΔF/Fm′) and NPQ over the 4-week measurement period and over the diurnal cycle. The normalised difference vegetation index (NDVI) was not correlated with any aspect of photochemical efficiency measured using chlorophyll fluorescence or xanthophyll pigments. This study demonstrated that photochemical adjustments were responsible for controlling the flow of energy through the photosynthetic apparatus in this mangrove forest canopy rather than canopy structural or chlorophyll adjustments.

Original language	English
Pages (from-to)	9-15
Number of pages	7
Journal	Trees - Structure and Function
Volume	20
Issue number	1
DOIs	https://doi.org/10.1007/s00468-005-0005-7
Publication status	Published - Jan 2006

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abstract = "This study examined the ability of the photochemical reflectance index (PRI) to track changes in effective quantum yield (ΔF/F m′), non-photochemical quenching (NPQ), and the xanthophyll cycle de-epoxidation (DPS) in an experimental mangrove canopy. PRI was correlated with (ΔF/Fm′) and NPQ over the 4-week measurement period and over the diurnal cycle. The normalised difference vegetation index (NDVI) was not correlated with any aspect of photochemical efficiency measured using chlorophyll fluorescence or xanthophyll pigments. This study demonstrated that photochemical adjustments were responsible for controlling the flow of energy through the photosynthetic apparatus in this mangrove forest canopy rather than canopy structural or chlorophyll adjustments.",

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AB - This study examined the ability of the photochemical reflectance index (PRI) to track changes in effective quantum yield (ΔF/F m′), non-photochemical quenching (NPQ), and the xanthophyll cycle de-epoxidation (DPS) in an experimental mangrove canopy. PRI was correlated with (ΔF/Fm′) and NPQ over the 4-week measurement period and over the diurnal cycle. The normalised difference vegetation index (NDVI) was not correlated with any aspect of photochemical efficiency measured using chlorophyll fluorescence or xanthophyll pigments. This study demonstrated that photochemical adjustments were responsible for controlling the flow of energy through the photosynthetic apparatus in this mangrove forest canopy rather than canopy structural or chlorophyll adjustments.

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Assessing photosynthetic efficiency in an experimental mangrove canopy using remote sensing and chlorophyll fluorescence

Abstract

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