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. 2022 Jan 20;188(1):29-31.
doi: 10.1093/plphys/kiab517.

Ancient sun protection: the evolutionary origin of plant UV-B signaling

Martin Balcerowicz  1
Affiliations

Ancient sun protection: the evolutionary origin of plant UV-B signaling

Martin Balcerowicz. Plant Physiol. .
No abstract available

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Figures

Figure 1
Figure 1
Schematic representation of the Arabidopsis UV-B signaling pathway. A, In the absence of UV-B, the UVR8 photoreceptor remains in its dimeric, inactive state. B, Upon UV-B absorption, UVR8 monomerizes and the monomer interacts with and inhibits COP1, thereby promoting HY5 accumulation but destabilizing PIF TFs. In addition, monomeric UVR8 also interferes with the function of TFs WRKY36, BES1/BIM1, MYB73/77, and MYB13 through direct interaction, thus controlling gene expression in a UV-B dependent manner. UV-B signaling also triggers expression of RUP1 and RUP2, which facilitate UVR8 redimerization and thereby attenuate UV-B signaling (reproduced from Zhang et al. [2021], Figure  1).
Figure 2
Figure 2
Evolution of the plant UV-B signaling pathway. Schematic representation of the plant phylogenetic tree and the likely points at which different components of the UV-B signaling pathway evolved within the last 1,100 million years (Ma) (reproduced from Zhang et al. [2021], Figure 6D).
See this image and copyright information in PMC

References

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    1. Zhang Z, Xu C, Zhang S, Shi C, Cheng H, Liu H, Zhong B (2022) Origin and adaptive evolution of UV RESISTANCE LOCUS 8-mediated signaling during plant terrestrialization. Plant Physiol 188: 332–346 - PMC - PubMed

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