Application prospects for combining active and passive observations of chlorophyll fluorescence

doi:10.17521/cjpe.2020.0323

Abstract

Abstract:

Chlorophyll fluorescence (ChlF) is the key to studying the physiological mechanisms of plant photosynthesis, quantifying the spatiotemporal pattern of vegetation photosynthesis, and accurately understanding the productivity of terrestrial ecosystems under the background of climate change. However, few studies have been conducted on combined observations of actively and passively induced ChlF. Here, we compared the advantages and disadvantages of active and passive observations of ChlF and showed the instrument composition of the combined observations of actively and passively induced ChlF at leaf and canopy scales. The application prospects of joint observations of actively and passively induced ChlF focus on exploring energy distribution among photosynthesis, fluorescence and heat dissipation at the chloroplast-leaf-canopy scale, clarifying the mechanism underlying the relationship between ChlF and gross primary productivity, verifying satellite-based sun-induced chlorophyll fluorescence and interpreting the shape of the ChlF spectrum. Our work suggests that the combined observation of actively and passively induced ChlF is essential to reveal the mechanisms underlying the relationships between fluorescence and photosynthesis at various scales and to improve vegetation productivity models at the global scale.

Key words: gross primary productivity, satellite-based sun-induced chlorophyll fluorescence, non-photochemical quenching, terrestrial biosphere model, energy distribution, fluorescence spectrum shape

DING Jian-Xi, ZHOU Lei, WANG Yong-Lin, ZHUANG Jie, CHEN Ji-Jing, ZHOU Wen, ZHAO Ning, SONG Jun, CHI Yong-Gang. Application prospects for combining active and passive observations of chlorophyll fluorescence[J]. Chin J Plant Ecol, 2021, 45(2): 105-118.

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URL: https://www.plant-ecology.com/EN/10.17521/cjpe.2020.0323

https://www.plant-ecology.com/EN/Y2021/V45/I2/105

Figures/Tables 7

Table 1 Satellite-based sensors used for the retrieval of satellite-based sun-induced chlorophyll fluorescence

传感器 Sensor	卫星 Satellite	发射时间 Launch time	波段 Band (nm)	状态 State	相关文献 Related literature
SCIAMACHY	ENVISAT	2002-03	650-790	失联 Lost contact	Joiner et al., 2011; Wolanin et al., 2015
GOME-2	METOP	2006-07	650-790	在轨 On orbit	Joiner et al., 2013; Guanter et al., 2014
TANSO-FTS-1	GOSAT	2009-01	757-775	在轨 On orbit	Frankenberg et al., 2011; Joiner et al., 2011
OCO-2	OCO-2	2014-07	757-775	在轨 On orbit	Frankenberg et al., 2014; Sun et al., 2017
ACGS	TANSAT	2016-12	758-778	在轨 On orbit	Du et al., 2018; Li et al., 2018
TROPOMI	Sentinel-5P	2017-10	675-775	在轨 On orbit	Guanter et al., 2015; Zhang et al., 2019
TANSO-FTS-2	GOSAT-2	2018-10	757-775	在轨 On orbit	Nakajima et al., 2017
OCO-3	OCO-3	2019-05	757-775	在轨 On orbit	Eldering et al., 2019
-	TEMPO	预计2020 Estimate 2020	650-740	计划发射 Planned launch	Zoogman et al., 2017; Mohammed et al., 2019
-	GeoCARB	预计2021 Estimate 2021	757-772	计划发射 Planned launch	O’Brienet al., 2016; Mohammed et al., 2019
FLORIS	FLEX	预计2023 Estimate 2023	650-780	计划发射 Planned launch	Drusch et al., 2016; Mohammed et al., 2019

Table 2 Instruments used for the ground-based continuous observation of sun-induced chlorophyll fluorescence

仪器设备 Equipment	光谱仪 Spectrometer	波段 Band (nm)	光学分辨率 Optical resolution (nm)	相关文献 Related literature
TriFLEX	HR2000+	630-815	0.50	Daumard et al., 2010
	HR2000+	630-815	0.50
	HR2000+	300-900	2.00
SpectroFLEX	HR2000+	630-820	0.20	Fournier et al., 2012
AutoSIF	QE65pro	645-805	0.30	Hu et al., 2018
S-FluorBox	HR4000	700-800	0.10	Cogliati et al., 2015
S-FluorBox	HR4000	400-1 000	1.00	Cogliati et al., 2015
SIF-SYS	STS-VIS	337-823	3.00	Burkart et al., 2015
FluoSpec	HR2000+	680-775	0.13	Yang et al., 2015
FluoSpec2	QEpro	730-780	0.15	Miao et al., 2018
FluoSpec2	HR2000+	350-1 100	1.10	Miao et al., 2018
PhotoSpec	QEpro1	670-732	0.30	Grossmann et al., 2018
	QEpro2	729-784	0.30
	Flame	177-874	1.20
FLOX	QEpro	650-800	0.30	Wohlfahrt et al., 2018
FLOX	VIS-NIR	400-950	1.50	Wohlfahrt et al., 2018
SIFSpec	QE65pro	649-805	0.34	Du et al., 2019
SIFPrism	QEpro	650-800	0.30	Zhang et al., 2019
FAME	QEpro	730-786	0.15	Gu et al., 2018

Fig. 1 Linear correlation matrix for combined observation of actively and passively induced chlorophyll fluorescence coupled gas exchange measurement parameter in rice. The figure showed actual observation data in the field. Color black means p < 0.05, blank means p > 0.05. Cab, leaf chlorophyll concentration; ETR, apparent combined electron transfer rate; Fs, steady-state fluorescence value; N, leaf nitrogen content; NPQ, non-photochemical quenching; Pn, net photosynthetic rate; SIF740, value of sun-induced chlorophyll fluorescence at 740 nm; SIF740yield, quantum yield of sun-induced chlorophyll fluorescence at 740 nm; Vcmax, maximum carboxylation rate; ФF, fluorescence efficiency; ФNPQ, NPQ efficiency; ФPSII, photochemical efficiency.

Fig. 2 Combined observation of actively and passively induced chlorophyll fluorescence coupled gas exchange measurement system and its sample data. The measurement system mainly includes: spectrometer (A); PAM fluorometer (B); gas exchange (C); incident light (D); light inlet (E); enclosed leaf chamber (F); optical fiber (G); leaves (H). Fd, variable fluorescence value under light adaptation; Fm, maximum fluorescence value; Fm', maximum fluorescence value under light adaptation; Fo, minimum fluorescence value; Fs, steady-state fluorescence value; Fv, maximum variable fluorescence value; NPQ, non-photochemical quenching; PAR, photosynthetically active radiation; SIF, sun-induced chlorophgll flhorescence.

Fig. 3 Combined observation system of actively and passively induced chlorophyll fluorescence built by the LIFT technology and ground observation system Flox (modified from Fig. S2 of Acebron (2020)).

Fig. 4 Relationship between ФF and ФPSII under the influence of ФNPQ(A), relationship change between Pn and SIF760 under the influence of NPQ (B) in rice. The figure showed actual observation data in the field. NPQ, non-photochemical quenching; Pn, net photosynthetic rate; SIF760, value of sun-induced chlorophyll fluorescence at 760 nm; ФF, fluorescence efficiency; ФNPQ, NPQ efficiency; ФPSII, photochemical efficiency.

Fig. 5 Leaves spectral curve of sun-induced chlorophyll fluorescence (SIF) under different treatments of rice. The figure showed actual observation data in the field. N, leaf nitrogen content; NPQ, non-photochemical quenching; SIF_line, SIF spectral curve; SLM, specific leaf mass.

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