Far-Red Chlorophyll Fluorescence Radiance Tracks Photosynthetic Carbon Assimilation Efficiency of Dark Reactions
Far-Red Chlorophyll Fluorescence Radiance Tracks Photosynthetic Carbon Assimilation Efficiency of Dark Reactions
复制标题
远红叶绿素荧光辐射追踪暗反应的光合碳同化效率
DOI：
10.3390/app112210821
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发表时间：
2021-11
期刊：
影响因子：
--
通讯作者：
Lu Xiaoliang
中科院分区：
文献类型：
--
作者：
Liu Zhunqiao;Guo Chenhui;Bai Yanwen;Zhang Nina;Yu Qiang;Zhao Feng;Lu Xiaoliang
从太空观测到的太阳诱导的叶绿素荧光(SIF)已经显示出与陆地光合作用速率密切相关。SIF起源于光合作用的光反应，而碳固定发生在光合作用的暗反应中。关于SIF是否能够跟踪光合作用中暗反应效率的变化，问题仍然存在。利用同步测量的叶片尺度气体交换、脉冲调幅(PAM)荧光和荧光光谱辐射，我们发现远红荧光辐射和PAM荧光产量都对光合作用碳同化作用的变化做出快速响应，这是由于环境因素的变化或在恒定光照条件下诱导气孔关闭。SIF测量的出射和入射辐照度不匹配的不确定性很可能会掩盖暗反应的贡献，从而导致先前报道的不一致的结果，即在暗反应的光合碳同化效率明显降低后，远红SIF和PAM的荧光产量没有变化。我们的结果证实，高质量的SIF测量具有提供对光合作用暗反应的洞察的潜力。这项研究对于更好地解释在大致恒定的立交桥时间和相对稳定的光强度下获得的卫星SIF观测结果特别相关。
Solar-induced chlorophyll fluorescence (SIF) observations from space have shown close relationships with terrestrial photosynthesis rates. SIF originates from the light reactions of photosynthesis, whereas carbon fixation takes place during the dark reactions of photosynthesis. Questions remain regarding whether SIF is able to track changes in the efficiency of the dark reactions in photosynthesis. Using concurrent measurements of leaf-scale gas exchange, pulse amplitude-modulated (PAM) fluorescence, and fluorescence spectral radiances, we found that both far-red fluorescence radiances and PAM fluorescence yields responded rapidly to changes in photosynthetic carbon assimilation due to changes in environmental factors or induced stomatal closure under constant light conditions. Uncertainties in outgoing and incoming irradiance mismatch for SIF measurements may very likely obscure the contributions of the dark reactions, thereby causing the inconsistent findings previously reported, which were no change in far-red SIF and PAM fluorescence yields after clear reductions in the photosynthetic carbon assimilation efficiency of dark reactions. Our results confirm that high-quality SIF measurements have the potential to provide insights into the dark reactions of photosynthesis. This study is particularly relevant for better interpreting satellite SIF observations that are obtained under roughly constant overpass times and relatively stable light intensities.
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影响因子：
4.6
作者：
Wohlfahrt G;Gerdel K;Migliavacca M;Rotenberg E;Tatarinov F;Müller J;Hammerle A;Julitta T;Spielmann FM;Yakir D
通讯作者：
Yakir D
影响因子：
6.2
作者：
Liu, Liangyun;Guan, Linlin;Liu, Xinjie
通讯作者：
Liu, Xinjie
DOI：
10.1073/pnas.1900278116
发表时间：
2019-06-11
影响因子：
11.1
作者：
Magney, Troy S.;Bowling, David R.;Frankenberg, Christian
通讯作者：
Frankenberg, Christian
影响因子：
5.2
作者：
Kohler, Philipp;Frankenberg, Christian;Landgraf, Jochen
通讯作者：
Landgraf, Jochen
影响因子：
1.6
作者：
A. Larkum
通讯作者：
A. Larkum