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. 2022 Jan 20;12:811948. doi: 10.3389/fpls.2021.811948

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Copyright © 2022 Yin, Tang, Xia and Yu.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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A proposed model for the induction of photosynthesis by BRs in a BZR1-dependent way. BZR1 regulates photosynthesis through the activation of the Calvin cycle in tomatoes. BRs induced the accumulation of BZR1 protein, especially the dephosphorylated forms of BZR1, which activates the transcription of the Calvin cycle genes such as FBA1, RCA1, FBP5, and PGK1 by directly binding to their promoters, subsequently enhancing the Calvin cycle. The induction of the Calvin cycle promotes photosynthesis. Arrows denote positive regulation.