Figure - PMC

Skip to main content

An official website of the United States government

Here's how you know

Here's how you know

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

View full-text article in PMC

. 2023 Mar 30;9(4):661–672. doi: 10.1038/s41477-023-01377-1

Search in PMC
Search in PubMed
View in NLM Catalog
Add to search

© The Author(s) 2023

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

PMC Copyright notice

Fig. 5 — a, Under control temperature conditions, light regulates the circadian clock and also HY5 and HYH-regulated genes. HY5 and HYH are necessary for the circadian regulation of SIG5 transcript accumulation, and circadian clock components might also regulate SIG5 expression directly. SIG5 regulates transcription of psbD via the BLRP, and HY5 or HYH might regulate psbD BLRP transcription through additional mechanisms. b, In response to cold temperatures, HY5 and HYH are necessary for the accumulation of SIG5 transcripts in response to cold, and the circadian clock gates the response to cold of SIG5 transcripts. SIG5 regulates PSII D2 and PSAC protein abundance, either by direct transcriptional regulation or through indirect mechanisms. SIG5 is necessary to maintain photosynthetic efficiency under long-term cold. SIG5 mutants have altered nuclear gene expression in response to cold, suggesting that SIG5 indirectly regulates nuclear genome transcription. Black solid arrows indicate regulatory relationships, broken arrows indicate inferred connections, a blue arrow entering the chloroplast indicates SIG5 targeting to chloroplasts and the sine wave icon indicates circadian regulation. Subcellular localization is inferred.