Activation of CO(2) assimilation during photosynthetic induction is slower in C(4) than in C(3) photosynthesis in three phylogenetically controlled experiments.
Activation of CO(2) assimilation during photosynthetic induction is slower in C(4) than in C(3) photosynthesis in three phylogenetically controlled experiments.
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DOI：
10.3389/fpls.2022.1091115
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发表时间：
2022
影响因子：
5.6
通讯作者：
Kromdijk, Johannes
中科院分区：
文献类型：
--
作者：
Cubas, Lucia Arce;Vath, Richard L.;Bernardo, Emmanuel L.;Sales, Cristina Rodrigues Gabriel;Burnett, Angela C.;Kromdijk, Johannes
关键词：
尽管具有C4光合作用的物种对全球碳循环和作物生产具有重要意义，但相对于C3物种，C4光合作用物种的研究仍然有些不足。虽然C4碳浓缩机制的好处在最佳的稳态条件下很容易观察到，但C4的存在如何影响光合作用诱导过程中二氧化碳同化的激活还不是很清楚。在这项研究中，我们旨在通过分析系统发育上连锁的三对C3和C4种的光合作用和光合作用反应的差异来表征C4和C3光合作用诱导反应的差异。为了评价光呼吸在光合作用诱导过程中的作用，分别在21%和2%O2条件下进行了实验。我们的结果证实，在光合作用诱导过程中，C4物种比C3物种对CO2同化的激活较慢，但这种差异背后的明显机制因属而异。不完全抑制光呼吸对C4黄花的光合作用诱导有显著影响，而在Cleome和Parteropsis C4种中，C3循环的延迟激活似乎限制了光呼吸的诱导，也发现了对光呼吸的潜在支持作用。在我们有限的物种样本中观察到的光合作用诱导反应的纯粹变化，突显了在比较C3和C4光合作用途径时控制进化距离的重要性。
Despite their importance for the global carbon cycle and crop production, species with C4 photosynthesis are still somewhat understudied relative to C3 species. Although the benefits of the C4 carbon concentrating mechanism are readily observable under optimal steady state conditions, it is less clear how the presence of C4 affects activation of CO2 assimilation during photosynthetic induction. In this study we aimed to characterise differences between C4 and C3 photosynthetic induction responses by analysing steady state photosynthesis and photosynthetic induction in three phylogenetically linked pairs of C3 and C4 species from Alloteropsis, Flaveria, and Cleome genera. Experiments were conducted both at 21% and 2% O2 to evaluate the role of photorespiration during photosynthetic induction. Our results confirm C4 species have slower activation of CO2 assimilation during photosynthetic induction than C3 species, but the apparent mechanism behind these differences varied between genera. Incomplete suppression of photorespiration was found to impact photosynthetic induction significantly in C4 Flaveria bidentis, whereas in the Cleome and Alloteropsis C4 species, delayed activation of the C3 cycle appeared to limit induction and a potentially supporting role for photorespiration was also identified. The sheer variation in photosynthetic induction responses observed in our limited sample of species highlights the importance of controlling for evolutionary distance when comparing C3 and C4 photosynthetic pathways.
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影响因子：
7.3
作者：
Kromdijk, Johannes;Griffiths, Howard;Schepers, Hans E.
通讯作者：
Schepers, Hans E.
DOI：
10.1071/pp9900579
发表时间：
1990-01-01
期刊：
AUSTRALIAN JOURNAL OF PLANT PHYSIOLOGY
影响因子：
--
作者：
KRALL, JP;EDWARDS, GE
通讯作者：
EDWARDS, GE
影响因子：
6.9
作者：
Arrivault S;Obata T;Szecówka M;Mengin V;Guenther M;Hoehne M;Fernie AR;Stitt M
通讯作者：
Stitt M
DOI：
10.1016/0304-4165(85)90004-2
发表时间：
1985-01-01
期刊：
BIOCHIMICA ET BIOPHYSICA ACTA
影响因子：
--
作者：
DIETZ, KJ
通讯作者：
DIETZ, KJ
影响因子：
7.3
作者：
Driever, Steven M.;Baker, Neil R.
通讯作者：
Baker, Neil R.