Size matters for single-cell C4 photosynthesis in Bienertia.
Size matters for single-cell C4 photosynthesis in Bienertia.
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DOI：
10.1093/jxb/erw374
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发表时间：
2017-01
影响因子：
6.9
通讯作者：
Burroughs NJ
中科院分区：
文献类型：
--
作者：
Jurić I;González-Pérez V;Hibberd JM;Edwards G;Burroughs NJ
即使在没有任何细胞内扩散屏障的情况下，初级和次级羧化酶之间的空间分离也足以容纳单细胞C4途径。
Bienertia cycloptera属于潜水员的一组植物，最近发现这些植物如何在不采用Kranz解剖学的情况下完成高光合作用的效率。在典型的生物植物细胞几何形状中，我们表明，空间分离低至10μm原发性和次级羧化酶可以单独提供足够的区分电阻，以在20°C下维持可行的C4途径，二氧化碳泄漏<35％。观察到的范围是生物植物的叶肉细胞开始发展其特征成熟的解剖结构。适用性甚至扩展到水生植物。
A spatial separation of 10 µm between primary and secondary carboxylases is sufficient for a single-cell C4 pathway, even in the absence of any intracellular diffusion barriers. Bienertia cycloptera belongs to a diverse set of plants, recently discovered to perform C4 photosynthesis within individual mesophyll cells. How these plants accomplish high photosynthetic efficiency without adopting Kranz anatomy remains unanswered. By modelling the processes of diffusion, capture, and release of carbon dioxide and oxygen inside a typical Bienertia mesophyll cell geometry, we show that a spatial separation as low as 10 μm between the primary and the secondary carboxylases, can, on its own, provide enough diffusive resistance to sustain a viable C4 pathway at 20 °C, with a CO2 leakage <35%. This critical separation corresponds to a cell diameter of 50 μm, consistent with the observed range where Bienertia’s mesophyll cells start to develop their characteristic mature anatomy. Our results are robust to significant alterations in model assumptions and environmental conditions, their applicability extending even to aquatic plants.
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影响因子：
7.3
作者：
King, Jenny L.;Edwards, Gerald E.;Cousins, Asaph B.
通讯作者：
Cousins, Asaph B.
影响因子：
3.7
作者：
Kubasek, Jiri;Setlik, Jiri;Santrucek, Jiri
通讯作者：
Santrucek, Jiri
影响因子：
6.2
作者：
Lung, Shiu-Cheung;Yanagisawa, Makoto;Chuong, Simon D. X.
通讯作者：
Chuong, Simon D. X.
影响因子：
7.4
作者：
LUGG, GA
通讯作者：
LUGG, GA
影响因子：
7.4
作者：
Boyd, Ryan A.;Gandin, Anthony;Cousins, Asaph B.
通讯作者：
Cousins, Asaph B.