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Different Responses of Solar-Induced Chlorophyll Fluorescence at the Red and Far-Red Bands and Gross Primary Productivity to Air Temperature for Winter Wheat

文献类型： 外文期刊

作者： Chen, Jidai 1 ; Liu, Xinjie 1 ; Yang, Guijun 4 ; Han, Shaoyu 4 ; Ma, Yan 1 ; Liu, Liangyun 1 ;

作者机构： 1.Chinese Acad Sci, Aerosp Informat Res Inst, Key Lab Digital Earth Sci, Beijing 100094, Peoples R China

2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China

3.Int Res Ctr Big Data Sustainable Dev Goals, Beijing 100094, Peoples R China

4.Beijing Acad Agr & Forestry Sci, Informat Technol Res Ctr, Key Lab Quantitat Remote Sensing Agr, Minist Agr & Rural Affairs, Beijing 100097, Peoples R China

关键词： air temperature; overwintering period; GPP; structure and physiology; SIF

期刊名称：REMOTE SENSING （ 影响因子：5.349； 五年影响因子：5.786 ）

ISSN：

年卷期： 2022 年 14 卷 13 期

页码：

收录情况： SCI

摘要： Solar-induced chlorophyll fluorescence (SIF) is closely related to the light-reaction process and has been recognized as a good indicator for tracking gross primary productivity (GPP). Nevertheless, it has not been widely examined how SIF and GPP respond to temperature. Here, we explored the linkage mechanisms between SIF and GPP in winter wheat based on continuous measurements of canopy SIF (cSIF), GPP, and meteorological data. To separately explore the structural and physiological mechanisms underlying the SIF-GPP relationship, we studied the temperature responses of the estimated light use efficiency (LUEp), canopy-level chlorophyll fluorescence yield (cSIF(yield)) and photosystem-level chlorophyll fluorescence yield (phi(F)) estimated using canopy-scale remote sensing measurements. We found that GPP, red canopy SIF (cSIF(688)) and far-red canopy SIF (cSIF(760)) all exhibited a decreasing trend during overwintering periods. However, GPP and cSIF(688) showed relatively more obvious changes in response to air temperature (T-a) than cSIF(760) did. In addition, the LUEp responded sensitively to T-a (the correlation coefficient, r = 0.83, p-value < 0.01). The cSIF(yield_688) and phi(F_688) (phi(F) at 688 nm) also exhibited significantly positive correlations with Ta (r > 0.7, p-value < 0.05), while cSIFyield_760 and phi(F_760) (phi(F) at 760 nm) were weakly correlated with Ta (r < 0.3, p-value > 0.05) during overwintering periods. The results also show that LUEp was more sensitive to Ta than phi(F), which caused changes in the LUEp/phi(F) ratio in response to T-a. By considering the influence of T-a, the GPP estimation based on the total SIF emitted at the photosystem level (tSIF) was improved (with R-2 increased by more than 0.12 for tSIF760 and more than 0.05 for tSIF(688)). Therefore, our results indicate that the LUEp/phi(F) ratio is affected by temperature conditions and highlights that the SIF-GPP model should consider the influence of temperature.

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