TY - JOUR
T1 - Attributing differences of solar-induced chlorophyll fluorescence (SIF)-gross primary production (GPP) relationships between two C4 crops
T2 - corn and miscanthus
AU - Wu, Genghong
AU - Guan, Kaiyu
AU - Jiang, Chongya
AU - Kimm, Hyungsuk
AU - Miao, Guofang
AU - Bernacchi, Carl J.
AU - Moore, Caitlin E.
AU - Ainsworth, Elizabeth A.
AU - Yang, Xi
AU - Berry, Joseph A.
AU - Frankenberg, Christian
AU - Chen, Min
N1 - This work was funded by the DOE Center for Advanced Bioenergy and Bioproducts Innovation (U.S. Department of Energy, Office of Science, Office of Biological and Environmental Research under Award Number DE-SC0018420 ). Any opinions, findings, and conclusions or recommendations expressed in this publication are those of the author(s) and do not necessarily reflect the views of the U.S. Department of Energy. GW and KG also acknowledged the support from NASA Future Investigators in NASA Earth and Space Science and Technology (FINESST) Program. GW, KG, and HK, acknowledged the support from NASA Carbon Monitoring System program managed by the NASA Terrestrial Ecology Program. We thank M. Pilar Cendrero-Mateo for sharing the iFLD code for SIF retrieval.
PY - 2022/8/15
Y1 - 2022/8/15
N2 - There remains limited information to characterize the solar-induced chlorophyll fluorescence (SIF)-gross primary production (GPP) relationship in C4 cropping systems. The annual C4 crop corn and perennial C4 crop miscanthus differ in phenology, canopy structure and leaf physiology. Investigating the SIF-GPP relationships in these species could deepen our understanding of SIF-GPP relationships within C4 crops. Using in situ canopy SIF and GPP measurements for both species along with leaf-level measurements, we found considerable differences in the SIF-GPP relationships between corn and miscanthus, with a stronger SIF-GPP relationship and higher slope of SIF-GPP observed in corn compared to miscanthus. These differences were mainly caused by leaf physiology. For miscanthus, high non-photochemical quenching (NPQ) under high light, temperature and water vapor deficit (VPD) conditions caused a large decline of fluorescence yield (ΦF), which further led to a SIF midday depression and weakened the SIF-GPP relationship. The larger slope in corn than miscanthus was mainly due to its higher GPP in mid-summer, largely attributed to the higher leaf photosynthesis and less NPQ. Our results demonstrated variation of the SIF-GPP relationship within C4 crops and highlighted the importance of leaf physiology in determining canopy SIF behaviors and SIF-GPP relationships.
AB - There remains limited information to characterize the solar-induced chlorophyll fluorescence (SIF)-gross primary production (GPP) relationship in C4 cropping systems. The annual C4 crop corn and perennial C4 crop miscanthus differ in phenology, canopy structure and leaf physiology. Investigating the SIF-GPP relationships in these species could deepen our understanding of SIF-GPP relationships within C4 crops. Using in situ canopy SIF and GPP measurements for both species along with leaf-level measurements, we found considerable differences in the SIF-GPP relationships between corn and miscanthus, with a stronger SIF-GPP relationship and higher slope of SIF-GPP observed in corn compared to miscanthus. These differences were mainly caused by leaf physiology. For miscanthus, high non-photochemical quenching (NPQ) under high light, temperature and water vapor deficit (VPD) conditions caused a large decline of fluorescence yield (ΦF), which further led to a SIF midday depression and weakened the SIF-GPP relationship. The larger slope in corn than miscanthus was mainly due to its higher GPP in mid-summer, largely attributed to the higher leaf photosynthesis and less NPQ. Our results demonstrated variation of the SIF-GPP relationship within C4 crops and highlighted the importance of leaf physiology in determining canopy SIF behaviors and SIF-GPP relationships.
KW - C4 crops
KW - Gross primary productivity
KW - Leaf absorbed energy partition
KW - Photosynthesis
KW - Solar-induced chlorophyll fluorescence
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U2 - 10.1016/j.agrformet.2022.109046
DO - 10.1016/j.agrformet.2022.109046
M3 - Article
AN - SCOPUS:85132767440
SN - 0168-1923
VL - 323
JO - Agricultural and Forest Meteorology
JF - Agricultural and Forest Meteorology
M1 - 109046
ER -