Implications of diurnal changes in leaf PRI on remote measurements of light use efficiency

Matti Mõttus; Juho Aalto; Luiz Aragão; Jaana Bäck; Rocío Hernández-Clemente; Eduardo Eiji Maeda; Vincent Markiet; Caroline J. Nichol; Raimundo Cosme Oliveira; Natalia Restrepo-Coupe; Scott Salesca

doi:10.1109/IGARSS.2018.8517554

Implications of diurnal changes in leaf PRI on remote measurements of light use efficiency

Matti Mõttus, Juho Aalto, Luiz Aragão, Jaana Bäck, Rocío Hernández-Clemente, Eduardo Eiji Maeda, Vincent Markiet, Caroline J. Nichol, Raimundo Cosme Oliveira, Natalia Restrepo-Coupe, Scott Salesca

Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review

Abstract

The spectral properties of plant leaves reflect the state of their photosynthetic apparatus and the surrounding environment. A well-known mechanism of photosynthetic downregulation, active on the time scale from minutes to hours, is caused by reversible changes in the xanthophyll cycle pigments. These changes affect leaf spectral absorption and are frequently quantified using the Photochemical Reflectance Index (PRI). This index can thus be used to monitor the photosynthetic status of the vegetation canopy, potentially from a large distance, and allows for a global satellite-based monitoring of photosynthesis. Such Earth observation satellites in near-polar orbits usually cover the same geographical location at the same local solar time at regular intervals. To facilitate the interpretation of these instantaneous remote PRI measurements and scale them to longer timescales, we measured the daily course of leaf PRI in two evergreen biomes: European boreal forest and Amazon rainforest. The daily course of PRI was different for the two locations. In Amazon, PRI was driven by incident Photosynthetic Photon Flux Density (PPFD). In the boreal location, PRI and PPFD were decoupled and PRI indicated downregulation only in the afternoon. This downregulation was confirmed with carbon exchange measurements. The study demonstrates the utility of biome-specific daily PRI curves for scaling instantaneous remote measurements to daily values and comparing data acquired at different times of day.

Original language	English
Title of host publication	2018 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2018 - Proceedings
Publisher	IEEE Institute of Electrical and Electronic Engineers
Pages	9007-9010
Number of pages	4
ISBN (Electronic)	978-1-5386-7150-4, 978-1-5386-7149-8
ISBN (Print)	978-1-5386-7151-1
DOIs	https://doi.org/10.1109/IGARSS.2018.8517554
Publication status	Published - 5 Nov 2018
MoE publication type	Not Eligible
Event	38th Annual IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2018 - Valencia, Spain Duration: 22 Jul 2018 → 27 Jul 2018

Conference

Conference	38th Annual IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2018
Abbreviated title	IGARSS
Country/Territory	Spain
City	Valencia
Period	22/07/18 → 27/07/18

Keywords

Photochemical Reflectance Index
Light Use Efficiency
Boreal forest
Amazon rainforest
Pinus sylvestris
Betula Pendula
Manilkara elata

Access to Document

10.1109/IGARSS.2018.8517554

Cite this

Mõttus, M., Aalto, J., Aragão, L., Bäck, J., Hernández-Clemente, R., Maeda, E. E., Markiet, V., Nichol, C. J., Cosme Oliveira, R., Restrepo-Coupe, N., & Salesca, S. (2018). Implications of diurnal changes in leaf PRI on remote measurements of light use efficiency. In 2018 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2018 - Proceedings (pp. 9007-9010). IEEE Institute of Electrical and Electronic Engineers. https://doi.org/10.1109/IGARSS.2018.8517554

@inproceedings{07a32d291ddc4fc0adb0d91972b41f77,

title = "Implications of diurnal changes in leaf PRI on remote measurements of light use efficiency",

abstract = "The spectral properties of plant leaves reflect the state of their photosynthetic apparatus and the surrounding environment. A well-known mechanism of photosynthetic downregulation, active on the time scale from minutes to hours, is caused by reversible changes in the xanthophyll cycle pigments. These changes affect leaf spectral absorption and are frequently quantified using the Photochemical Reflectance Index (PRI). This index can thus be used to monitor the photosynthetic status of the vegetation canopy, potentially from a large distance, and allows for a global satellite-based monitoring of photosynthesis. Such Earth observation satellites in near-polar orbits usually cover the same geographical location at the same local solar time at regular intervals. To facilitate the interpretation of these instantaneous remote PRI measurements and scale them to longer timescales, we measured the daily course of leaf PRI in two evergreen biomes: European boreal forest and Amazon rainforest. The daily course of PRI was different for the two locations. In Amazon, PRI was driven by incident Photosynthetic Photon Flux Density (PPFD). In the boreal location, PRI and PPFD were decoupled and PRI indicated downregulation only in the afternoon. This downregulation was confirmed with carbon exchange measurements. The study demonstrates the utility of biome-specific daily PRI curves for scaling instantaneous remote measurements to daily values and comparing data acquired at different times of day.",

keywords = "Photochemical Reflectance Index, Light Use Efficiency, Boreal forest, Amazon rainforest, Pinus sylvestris, Betula Pendula, Manilkara elata",

author = "Matti M{\~o}ttus and Juho Aalto and Luiz Arag{\~a}o and Jaana B{\"a}ck and Roc{\'i}o Hern{\'a}ndez-Clemente and Maeda, {Eduardo Eiji} and Vincent Markiet and Nichol, {Caroline J.} and {Cosme Oliveira}, Raimundo and Natalia Restrepo-Coupe and Scott Salesca",

year = "2018",

month = nov,

day = "5",

doi = "10.1109/IGARSS.2018.8517554",

language = "English",

isbn = "978-1-5386-7151-1",

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booktitle = "2018 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2018 - Proceedings",

publisher = "IEEE Institute of Electrical and Electronic Engineers",

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note = "38th Annual IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2018, IGARSS ; Conference date: 22-07-2018 Through 27-07-2018",

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Mõttus, M, Aalto, J, Aragão, L, Bäck, J, Hernández-Clemente, R, Maeda, EE, Markiet, V, Nichol, CJ, Cosme Oliveira, R, Restrepo-Coupe, N & Salesca, S 2018, Implications of diurnal changes in leaf PRI on remote measurements of light use efficiency. in 2018 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2018 - Proceedings. IEEE Institute of Electrical and Electronic Engineers, pp. 9007-9010, 38th Annual IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2018, Valencia, Spain, 22/07/18. https://doi.org/10.1109/IGARSS.2018.8517554

Implications of diurnal changes in leaf PRI on remote measurements of light use efficiency. / Mõttus, Matti; Aalto, Juho; Aragão, Luiz et al.
2018 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2018 - Proceedings. IEEE Institute of Electrical and Electronic Engineers, 2018. p. 9007-9010.

Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review

TY - GEN

T1 - Implications of diurnal changes in leaf PRI on remote measurements of light use efficiency

AU - Mõttus, Matti

AU - Aalto, Juho

AU - Aragão, Luiz

AU - Bäck, Jaana

AU - Hernández-Clemente, Rocío

AU - Maeda, Eduardo Eiji

AU - Markiet, Vincent

AU - Nichol, Caroline J.

AU - Cosme Oliveira, Raimundo

AU - Restrepo-Coupe, Natalia

AU - Salesca, Scott

PY - 2018/11/5

Y1 - 2018/11/5

N2 - The spectral properties of plant leaves reflect the state of their photosynthetic apparatus and the surrounding environment. A well-known mechanism of photosynthetic downregulation, active on the time scale from minutes to hours, is caused by reversible changes in the xanthophyll cycle pigments. These changes affect leaf spectral absorption and are frequently quantified using the Photochemical Reflectance Index (PRI). This index can thus be used to monitor the photosynthetic status of the vegetation canopy, potentially from a large distance, and allows for a global satellite-based monitoring of photosynthesis. Such Earth observation satellites in near-polar orbits usually cover the same geographical location at the same local solar time at regular intervals. To facilitate the interpretation of these instantaneous remote PRI measurements and scale them to longer timescales, we measured the daily course of leaf PRI in two evergreen biomes: European boreal forest and Amazon rainforest. The daily course of PRI was different for the two locations. In Amazon, PRI was driven by incident Photosynthetic Photon Flux Density (PPFD). In the boreal location, PRI and PPFD were decoupled and PRI indicated downregulation only in the afternoon. This downregulation was confirmed with carbon exchange measurements. The study demonstrates the utility of biome-specific daily PRI curves for scaling instantaneous remote measurements to daily values and comparing data acquired at different times of day.

AB - The spectral properties of plant leaves reflect the state of their photosynthetic apparatus and the surrounding environment. A well-known mechanism of photosynthetic downregulation, active on the time scale from minutes to hours, is caused by reversible changes in the xanthophyll cycle pigments. These changes affect leaf spectral absorption and are frequently quantified using the Photochemical Reflectance Index (PRI). This index can thus be used to monitor the photosynthetic status of the vegetation canopy, potentially from a large distance, and allows for a global satellite-based monitoring of photosynthesis. Such Earth observation satellites in near-polar orbits usually cover the same geographical location at the same local solar time at regular intervals. To facilitate the interpretation of these instantaneous remote PRI measurements and scale them to longer timescales, we measured the daily course of leaf PRI in two evergreen biomes: European boreal forest and Amazon rainforest. The daily course of PRI was different for the two locations. In Amazon, PRI was driven by incident Photosynthetic Photon Flux Density (PPFD). In the boreal location, PRI and PPFD were decoupled and PRI indicated downregulation only in the afternoon. This downregulation was confirmed with carbon exchange measurements. The study demonstrates the utility of biome-specific daily PRI curves for scaling instantaneous remote measurements to daily values and comparing data acquired at different times of day.

KW - Photochemical Reflectance Index

KW - Light Use Efficiency

KW - Boreal forest

KW - Amazon rainforest

KW - Pinus sylvestris

KW - Betula Pendula

KW - Manilkara elata

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U2 - 10.1109/IGARSS.2018.8517554

DO - 10.1109/IGARSS.2018.8517554

M3 - Conference article in proceedings

SN - 978-1-5386-7151-1

SP - 9007

EP - 9010

BT - 2018 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2018 - Proceedings

PB - IEEE Institute of Electrical and Electronic Engineers

T2 - 38th Annual IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2018

Y2 - 22 July 2018 through 27 July 2018

ER -

Mõttus M, Aalto J, Aragão L, Bäck J, Hernández-Clemente R, Maeda EE et al. Implications of diurnal changes in leaf PRI on remote measurements of light use efficiency. In 2018 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2018 - Proceedings. IEEE Institute of Electrical and Electronic Engineers. 2018. p. 9007-9010 doi: 10.1109/IGARSS.2018.8517554

Implications of diurnal changes in leaf PRI on remote measurements of light use efficiency

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Keywords

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