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Divergent Flowering Time Responses to Increasing Temperatures Are Associated With Transcriptome Plasticity and Epigenetic Modification Differences at FLC Promoter Region of Arabidopsis thaliana

文献类型： 外文期刊

作者： Han, Yu 1 ; Liu, Li 1 ; Lei, Mengyu 1 ; Liu, Wei 2 ; Si, Huan 1 ; Ji, Yan 1 ; Du, Qiao 1 ; Zhu, Mingjia 4 ; Zhang, Wenjia 1 ; Dai, Yifei 5 ; Liu, Jianquan 2 ; Zan, Yanjun 1 ;

作者机构： 1.Chinese Acad Agr Sci, Tobacco Res Inst, Qingdao, Peoples R China

2.Sichuan Univ, Coll Life Sci, Minist Educ, Key Lab Bioresource & Ecoenvironm, Chengdu, Peoples R China

3.Sichuan Univ, Coll Life Sci, Sichuan Zoige Alpine Wetland Ecosyst Natl Observat, Chengdu, Peoples R China

4.Lanzhou Univ, Coll Ecol, State Key Lab Grassland Agroecosyst, Lanzhou, Peoples R China

5.Univ Michigan, Sch Publ Hlth, Biostat Dept, Ann Arbor, MI USA

关键词： ecological adaptation; flowering time; gene co-expression network; plasticity

期刊名称：MOLECULAR ECOLOGY （ 影响因子：3.9； 五年影响因子：4.8 ）

ISSN： 0962-1083

年卷期： 2025 年 34 卷 15 期

页码：

收录情况： SCI

摘要： Understanding the genetic, and transcriptomic changes that drive the phenotypic plasticity of fitness traits is a central question in evolutionary biology. In this study, we utilised 152 natural Swedish Arabidopsis thaliana accessions with re-sequenced genomes, transcriptomes and methylomes and measured flowering times (FTs) under two temperature conditions (10 degrees C and 16 degrees C) to address this question. We revealed that the northern accessions exhibited advanced flowering in response to decreased temperature, whereas the southern accessions delayed their flowering, indicating a divergent flowering response. This contrast in flowering responses was associated with the isothermality of their native ranges, which potentially enables the northern accessions to complete their life cycle more rapidly in years with shorter growth seasons. At the transcriptome level, we observed extensive rewiring of gene co-expression networks, with the expression of 25 core genes being associated with the mean FT and its plastic variation. Notably, variations in FLC expression sensitivity between northern and southern accessions were found to be associated with the divergence FT response. Further analysis suggests that FLC expression sensitivity is associated with differences in CG, CHG and CHH methylation at the promoter region. Overall, our study revealed the association between transcriptome plasticity and flowering time plasticity among different accessions, providing evidence for its relevance in ecological adaptation. These findings offer deeper insights into the genetics of rapid responses to environmental changes and ecological adaptation.

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