Modeling re - absorption of fluorescence from the leaf to the canopy level

Modeling re - absorption of fluorescence from the leaf to the canopy level

Chlorophyll fluorescence is widely used as an indicator of photosynthesis and physiological state of plants. Remote acquisition of fluorescence allows the diagnosis of large field extensions, even from satellite measurements. Nevertheless, fluorescence emerging from chloroplasts, the one directly connected to plant physiology, undergoes re-absorption processes both within the leaf and the canopy. Therefore, corrections of the observed canopy fluorescence, taking into account these two re-absorption processes may help to draw accurate inferences about plant health. Here, we show the theoretical development and experimental validation of a model that allows to retrieve the spectral distribution of the leaf fluorescence spectrum from that on top of canopy (TOC) using a correction factor which is a function of both canopy and soil reflectance, and canopy transmittance. Canopy fluorescence spectra corrected by our theoretical approach and normalized shows 95% correlation with the normalized fluorescence spectrum at leaf-level, thus validating the model. Therefore, our results provide a physical explanation and quantification for fluorescence re-absorption within the canopy, a phenomenon which has only been mentioned but never measured up to the date. From a more general perspective, this new analytical tool together with the one previously developed by Ramos and Lagorio (2004) allows to obtain the spectral distribution of chloroplast fluorescence spectrum from that on top of canopy (TOC).

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Main Authors: Romero, Juan M., Cordon, Gabriela, Lagorio, María Gabriela
Format: Texto biblioteca
Language:eng
Subjects:CHLOROPHYLL FLUORESCENCE, CANOPY, LIGHT RE-ABSORPTION, REMOTE SENSING, PHOTOPHYSICAL MODELING,
Online Access:http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=46418
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spelling KOHA-OAI-AGRO:464182023-11-17T13:00:53Zhttp://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=46418http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=AAGModeling re - absorption of fluorescence from the leaf to the canopy levelRomero, Juan M.Cordon, GabrielaLagorio, María Gabrielatextengapplication/pdfChlorophyll fluorescence is widely used as an indicator of photosynthesis and physiological state of plants. Remote acquisition of fluorescence allows the diagnosis of large field extensions, even from satellite measurements. Nevertheless, fluorescence emerging from chloroplasts, the one directly connected to plant physiology, undergoes re-absorption processes both within the leaf and the canopy. Therefore, corrections of the observed canopy fluorescence, taking into account these two re-absorption processes may help to draw accurate inferences about plant health. Here, we show the theoretical development and experimental validation of a model that allows to retrieve the spectral distribution of the leaf fluorescence spectrum from that on top of canopy (TOC) using a correction factor which is a function of both canopy and soil reflectance, and canopy transmittance. Canopy fluorescence spectra corrected by our theoretical approach and normalized shows 95% correlation with the normalized fluorescence spectrum at leaf-level, thus validating the model. Therefore, our results provide a physical explanation and quantification for fluorescence re-absorption within the canopy, a phenomenon which has only been mentioned but never measured up to the date. From a more general perspective, this new analytical tool together with the one previously developed by Ramos and Lagorio (2004) allows to obtain the spectral distribution of chloroplast fluorescence spectrum from that on top of canopy (TOC).Chlorophyll fluorescence is widely used as an indicator of photosynthesis and physiological state of plants. Remote acquisition of fluorescence allows the diagnosis of large field extensions, even from satellite measurements. Nevertheless, fluorescence emerging from chloroplasts, the one directly connected to plant physiology, undergoes re-absorption processes both within the leaf and the canopy. Therefore, corrections of the observed canopy fluorescence, taking into account these two re-absorption processes may help to draw accurate inferences about plant health. Here, we show the theoretical development and experimental validation of a model that allows to retrieve the spectral distribution of the leaf fluorescence spectrum from that on top of canopy (TOC) using a correction factor which is a function of both canopy and soil reflectance, and canopy transmittance. Canopy fluorescence spectra corrected by our theoretical approach and normalized shows 95% correlation with the normalized fluorescence spectrum at leaf-level, thus validating the model. Therefore, our results provide a physical explanation and quantification for fluorescence re-absorption within the canopy, a phenomenon which has only been mentioned but never measured up to the date. From a more general perspective, this new analytical tool together with the one previously developed by Ramos and Lagorio (2004) allows to obtain the spectral distribution of chloroplast fluorescence spectrum from that on top of canopy (TOC).CHLOROPHYLL FLUORESCENCECANOPYLIGHT RE-ABSORPTIONREMOTE SENSINGPHOTOPHYSICAL MODELINGRemote sensing of environment
institution UBA FA
collection Koha
country Argentina
countrycode AR
component Bibliográfico
access En linea
En linea
databasecode cat-ceiba
tag biblioteca
region America del Sur
libraryname Biblioteca Central FAUBA
language eng
topic CHLOROPHYLL FLUORESCENCE
CANOPY
LIGHT RE-ABSORPTION
REMOTE SENSING
PHOTOPHYSICAL MODELING
CHLOROPHYLL FLUORESCENCE
CANOPY
LIGHT RE-ABSORPTION
REMOTE SENSING
PHOTOPHYSICAL MODELING
spellingShingle CHLOROPHYLL FLUORESCENCE
CANOPY
LIGHT RE-ABSORPTION
REMOTE SENSING
PHOTOPHYSICAL MODELING
CHLOROPHYLL FLUORESCENCE
CANOPY
LIGHT RE-ABSORPTION
REMOTE SENSING
PHOTOPHYSICAL MODELING
Romero, Juan M.
Cordon, Gabriela
Lagorio, María Gabriela
Modeling re - absorption of fluorescence from the leaf to the canopy level
description Chlorophyll fluorescence is widely used as an indicator of photosynthesis and physiological state of plants. Remote acquisition of fluorescence allows the diagnosis of large field extensions, even from satellite measurements. Nevertheless, fluorescence emerging from chloroplasts, the one directly connected to plant physiology, undergoes re-absorption processes both within the leaf and the canopy. Therefore, corrections of the observed canopy fluorescence, taking into account these two re-absorption processes may help to draw accurate inferences about plant health. Here, we show the theoretical development and experimental validation of a model that allows to retrieve the spectral distribution of the leaf fluorescence spectrum from that on top of canopy (TOC) using a correction factor which is a function of both canopy and soil reflectance, and canopy transmittance. Canopy fluorescence spectra corrected by our theoretical approach and normalized shows 95% correlation with the normalized fluorescence spectrum at leaf-level, thus validating the model. Therefore, our results provide a physical explanation and quantification for fluorescence re-absorption within the canopy, a phenomenon which has only been mentioned but never measured up to the date. From a more general perspective, this new analytical tool together with the one previously developed by Ramos and Lagorio (2004) allows to obtain the spectral distribution of chloroplast fluorescence spectrum from that on top of canopy (TOC).
format Texto
topic_facet CHLOROPHYLL FLUORESCENCE
CANOPY
LIGHT RE-ABSORPTION
REMOTE SENSING
PHOTOPHYSICAL MODELING
author Romero, Juan M.
Cordon, Gabriela
Lagorio, María Gabriela
author_facet Romero, Juan M.
Cordon, Gabriela
Lagorio, María Gabriela
author_sort Romero, Juan M.
title Modeling re - absorption of fluorescence from the leaf to the canopy level
title_short Modeling re - absorption of fluorescence from the leaf to the canopy level
title_full Modeling re - absorption of fluorescence from the leaf to the canopy level
title_fullStr Modeling re - absorption of fluorescence from the leaf to the canopy level
title_full_unstemmed Modeling re - absorption of fluorescence from the leaf to the canopy level
title_sort modeling re - absorption of fluorescence from the leaf to the canopy level
url http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=46418
http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=
http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=
http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=
http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=
work_keys_str_mv AT romerojuanm modelingreabsorptionoffluorescencefromtheleaftothecanopylevel
AT cordongabriela modelingreabsorptionoffluorescencefromtheleaftothecanopylevel
AT lagoriomariagabriela modelingreabsorptionoffluorescencefromtheleaftothecanopylevel
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