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Title: Sun‐induced Chl fluorescence and its importance for biophysical modeling of photosynthesis based on light reactions

Abstract

Recent progress in observing sun-induced Chl fluorescence (SIF) provides an unprecedented opportunity to advance photosynthesis research in natural environments. However, we still lack an analytical framework to guide SIF studies and integration with the well-developed active fluorescence approaches. Here, we derive a set of coupled fundamental equations to describe the dynamics of SIF and its relationship with C3 and C4 photosynthesis. These equations show that, although SIF is dynamically as complex as photosynthesis, the measured SIF simplifies photosynthetic modeling from the perspective of light reactions by integrating over the dynamic complexities of photosynthesis. Specifically, the measured SIF contains direct information about the actual electron transport from photosystem II to photosystem I, giving a quantifiable link between light and dark reactions. With much-reduced requirements on inputs and parameters, the light-reactions-centric, SIF-based biophysical model complements the traditional, dark-reactions-centric biochemical model of photosynthesis. Furthermore, the SIF–photosynthesis relationship, however, is nonlinear. This is because photosynthesis saturates at high light whereas SIF has a stronger tendency to keep increasing, as fluorescence quantum yield has a relatively muted sensitivity to light levels. Successful applications of the SIF-based model of photosynthesis will depend on a predictive understanding of several previously underexplored physiological and biophysical processes. Advances canmore » be facilitated by coordinated efforts in plant physiology, remote sensing, and eddy covariance flux observations.« less

Authors:
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [3]; ORCiD logo [4]; ORCiD logo [4]
  1. Environmental Sciences Division and Climate Change Science Institute Oak Ridge National Laboratory Oak Ridge TN 37831 USA
  2. Environmental Sciences Division and Climate Change Science Institute Oak Ridge National Laboratory Oak Ridge TN 37831 USA, The Key Laboratory of Oasis Eco‐agriculture, Xinjiang Production and Construction Group Shihezi University Shihezi 832003 China
  3. School of Natural Resources University of Missouri Columbia MO 65211 USA
  4. School of Integrative Plant Science Cornell University Ithaca NY 14853 USA
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Biological and Environmental Research (BER)
OSTI Identifier:
1507469
Alternate Identifier(s):
OSTI ID: 1507472; OSTI ID: 1822046
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Published Article
Journal Name:
New Phytologist
Additional Journal Information:
Journal Name: New Phytologist Journal Volume: 223 Journal Issue: 3; Journal ID: ISSN 0028-646X
Publisher:
Wiley-Blackwell
Country of Publication:
United Kingdom
Language:
English
Subject:
59 BASIC BIOLOGICAL SCIENCES; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; biochemical models of photosynthesis; biophysical models of photosynthesis; dark reactions; light reactions; nonphotochemical quenching; reaction centers; sun-induced Chl fluorescence (SIF)

Citation Formats

Gu, Lianhong, Han, Jimei, Wood, Jeffrey D., Chang, Christine Y‐Y., and Sun, Ying. Sun‐induced Chl fluorescence and its importance for biophysical modeling of photosynthesis based on light reactions. United Kingdom: N. p., 2019. Web. doi:10.1111/nph.15796.
Gu, Lianhong, Han, Jimei, Wood, Jeffrey D., Chang, Christine Y‐Y., & Sun, Ying. Sun‐induced Chl fluorescence and its importance for biophysical modeling of photosynthesis based on light reactions. United Kingdom. https://doi.org/10.1111/nph.15796
Gu, Lianhong, Han, Jimei, Wood, Jeffrey D., Chang, Christine Y‐Y., and Sun, Ying. Wed . "Sun‐induced Chl fluorescence and its importance for biophysical modeling of photosynthesis based on light reactions". United Kingdom. https://doi.org/10.1111/nph.15796.
@article{osti_1507469,
title = {Sun‐induced Chl fluorescence and its importance for biophysical modeling of photosynthesis based on light reactions},
author = {Gu, Lianhong and Han, Jimei and Wood, Jeffrey D. and Chang, Christine Y‐Y. and Sun, Ying},
abstractNote = {Recent progress in observing sun-induced Chl fluorescence (SIF) provides an unprecedented opportunity to advance photosynthesis research in natural environments. However, we still lack an analytical framework to guide SIF studies and integration with the well-developed active fluorescence approaches. Here, we derive a set of coupled fundamental equations to describe the dynamics of SIF and its relationship with C3 and C4 photosynthesis. These equations show that, although SIF is dynamically as complex as photosynthesis, the measured SIF simplifies photosynthetic modeling from the perspective of light reactions by integrating over the dynamic complexities of photosynthesis. Specifically, the measured SIF contains direct information about the actual electron transport from photosystem II to photosystem I, giving a quantifiable link between light and dark reactions. With much-reduced requirements on inputs and parameters, the light-reactions-centric, SIF-based biophysical model complements the traditional, dark-reactions-centric biochemical model of photosynthesis. Furthermore, the SIF–photosynthesis relationship, however, is nonlinear. This is because photosynthesis saturates at high light whereas SIF has a stronger tendency to keep increasing, as fluorescence quantum yield has a relatively muted sensitivity to light levels. Successful applications of the SIF-based model of photosynthesis will depend on a predictive understanding of several previously underexplored physiological and biophysical processes. Advances can be facilitated by coordinated efforts in plant physiology, remote sensing, and eddy covariance flux observations.},
doi = {10.1111/nph.15796},
journal = {New Phytologist},
number = 3,
volume = 223,
place = {United Kingdom},
year = {2019},
month = {4}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1111/nph.15796

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Cited by: 17 works
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