Perrella, G., Fasano, C., Donald, N. A., Daddiego, L., Fang, W., Martignago, D., Carr, C., Conti, L., Herzyk, P. and Amtmann, A. (2023) Histone Deacetylase Complex 1 and Histone 1 epigenetically moderate stress responsiveness of Arabidopsis thaliana seedlings. New Phytologist, (doi: 10.1111/nph.19165) (PMID:37565540) (Early Online Publication)
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Abstract
Summary. Summary Early responses of plants to environmental stress factors prevent damage but can delay growth and development in fluctuating conditions. Optimising these trade-offs requires tunability of plant responsiveness to environmental signals. We have previously reported that Histone Deacetylase Complex 1 (HDC1), which interacts with multiple proteins in histone deacetylation complexes, regulates the stress responsiveness of Arabidopsis seedlings, but the underlying mechanism remained elusive. Here, we show that HDC1 attenuates transcriptome re-programming in salt-treated seedlings, and we identify two genes (LEA and MAF5) that inhibit seedling establishment under salt stress downstream of HDC1. HDC1 attenuates their transcriptional induction by salt via a dual mechanism involving H3K9/14 deacetylation and H3K27 trimethylation. The latter, but not the former, was also abolished in a triple knockout mutant of the linker histone H1, which partially mimics the hypersensitivity of the hdc1-1 mutant to salt stress. Although stress-induced H3K27me3 accumulation required both H1 and HDC1, it was not fully recovered by complementing hdc1-1 with a truncated, H1-binding competent HDC1 suggesting other players or independent inputs. The combined findings reveal a dual brake function of HDC1 via regulating both active and repressive epigenetic marks on stress-inducible genes. This natural ‘anti-panic’ device offers a molecular leaver to tune stress responsiveness in plants.
| Item Type: | Articles |
|---|---|
| Status: | Early Online Publication |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Carr, Mr Craig and Perrella, Dr Giorgio and Amtmann, Professor Anna and Herzyk, Dr Pawel and Donald, Miss Naomi |
| Authors: | Perrella, G., Fasano, C., Donald, N. A., Daddiego, L., Fang, W., Martignago, D., Carr, C., Conti, L., Herzyk, P., and Amtmann, A. |
| College/School: | College of Medical Veterinary and Life Sciences > School of Molecular Biosciences |
| Journal Name: | New Phytologist |
| Publisher: | Wiley |
| ISSN: | 0028-646X |
| ISSN (Online): | 1469-8137 |
| Published Online: | 10 August 2023 |
| Copyright Holders: | Copyright © 2023 The Authors |
| First Published: | First published in New Phytologist 2023 |
| Publisher Policy: | Reproduced under a Creative Commons licence |
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