Temperature-dependent jumonji demethylase modulates flowering time by targeting H3K36me2/3 in Brassica rapa

Xiaoyun Xin, Peirong Li, Xiuyun Zhao, Yangjun Yu, Weihong Wang, Guihua Jin, Jiao Wang, Liling Sun, Deshuang Zhang, Fenglan Zhang (), Shuancang Yu () and Tongbing Su ()
Additional contact information
Xiaoyun Xin: Beijing Academy of Agriculture and Forestry Science
Peirong Li: Beijing Academy of Agriculture and Forestry Science
Xiuyun Zhao: Beijing Academy of Agriculture and Forestry Science
Yangjun Yu: Beijing Academy of Agriculture and Forestry Science
Weihong Wang: Beijing Academy of Agriculture and Forestry Science
Guihua Jin: Beijing Academy of Agriculture and Forestry Science
Jiao Wang: Beijing Academy of Agriculture and Forestry Science
Liling Sun: Beijing Academy of Agriculture and Forestry Science
Deshuang Zhang: Beijing Academy of Agriculture and Forestry Science
Fenglan Zhang: Beijing Academy of Agriculture and Forestry Science
Shuancang Yu: Beijing Academy of Agriculture and Forestry Science
Tongbing Su: Beijing Academy of Agriculture and Forestry Science

Nature Communications, 2024, vol. 15, issue 1, 1-19

Abstract: Abstract Global warming has a severe impact on the flowering time and yield of crops. Histone modifications have been well-documented for their roles in enabling plant plasticity in ambient temperature. However, the factor modulating histone modifications and their involvement in habitat adaptation have remained elusive. In this study, through genome-wide pattern analysis and quantitative-trait-locus (QTL) mapping, we reveal that BrJMJ18 is a candidate gene for a QTL regulating thermotolerance in thermotolerant B. rapa subsp. chinensis var. parachinensis (or Caixin, abbreviated to Par). BrJMJ18 encodes an H3K36me2/3 Jumonji demethylase that remodels H3K36 methylation across the genome. We demonstrate that the BrJMJ18 allele from Par (BrJMJ18Par) influences flowering time and plant growth in a temperature-dependent manner via characterizing overexpression and CRISPR/Cas9 mutant plants. We further show that overexpression of BrJMJ18Par can modulate the expression of BrFLC3, one of the five BrFLC orthologs. Furthermore, ChIP-seq and transcriptome data reveal that BrJMJ18Par can regulate chlorophyll biosynthesis under high temperatures. We also demonstrate that three amino acid mutations may account for function differences in BrJMJ18 between subspecies. Based on these findings, we propose a working model in which an H3K36me2/3 demethylase, while not affecting agronomic traits under normal conditions, can enhance resilience under heat stress in Brassica rapa.

Date: 2024
References: View references in EconPapers View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.nature.com/articles/s41467-024-49721-z Abstract (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-49721-z

Ordering information: This journal article can be ordered from
https://www.nature.com/ncomms/

DOI: 10.1038/s41467-024-49721-z

Access Statistics for this article

Nature Communications is currently edited by Nathalie Le Bot, Enda Bergin and Fiona Gillespie

More articles in Nature Communications from Nature
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().