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. 2021 Jun 26;72(17):6003–6017. doi: 10.1093/jxb/erab266

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© The Author(s) 2021. Published by Oxford University Press on behalf of the Society for Experimental Biology.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.

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Fig. 2. — Scheme for linear and cyclic electron transport in the light reactions of photosynthesis. The arrows indicate electron transport. Thick curved arrows show the number of protons produced per electron transported. J denotes linear electron transport through PSII, J₁ is electron transport through PSI, and J_cyc is the rate of cyclic electron transport. f_cyc denotes the fraction of J₁ that flows via the cyclic mode. The diagram has been adapted from Yin et al. (2004). Since J=J1-Jcyc=J1(1-fcyc), J1=J/(1-fcyc).