当前位置: X-MOL 学术Heredity › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Epigenetic responses of hare barley ( Hordeum murinum subsp. leporinum ) to climate change: an experimental, trait-based approach
Heredity ( IF 3.8 ) Pub Date : 2021-02-19 , DOI: 10.1038/s41437-021-00415-y
Víctor Chano 1, 2, 3 , Tania Domínguez-Flores 2 , Maria Dolores Hidalgo-Galvez 1 , Jesús Rodríguez-Calcerrada 2 , Ignacio Manuel Pérez-Ramos 1
Affiliation  

The impact of reduced rainfall and increased temperatures forecasted by climate change models on plant communities will depend on the capacity of plant species to acclimate and adapt to new environmental conditions. The acclimation process is mainly driven by epigenetic regulation, including structural and chemical modifications on the genome that do not affect the nucleotide sequence. In plants, one of the best-known epigenetic mechanisms is cytosine-methylation. We evaluated the impact of 30% reduced rainfall (hereafter “drought” treatment; D), 3 °C increased air temperature (“warming”; W), and the combination of D and W (WD) on the phenotypic and epigenetic variability of Hordeum murinum subsp. leporinum L., a grass species of high relevance in Mediterranean agroforestry systems. A full factorial experiment was set up in a savannah-like ecosystem located in southwestern Spain. H. murinum exhibited a large phenotypic plasticity in response to climatic conditions. Plants subjected to warmer conditions (i.e., W and WD treatments) flowered earlier, and those subjected to combined stress (WD) showed a higher investment in leaf area per unit of leaf mass (i.e., higher SLA) and produced heavier seeds. Our results also indicated that both the level and patterns of methylation varied substantially with the climatic treatments, with the combination of D and W inducing a clearly different epigenetic response compared to that promoted by D and W separately. The main conclusion achieved in this work suggests a potential role of epigenetic regulation of gene expression for the maintenance of homoeostasis and functional stability under future climate change scenarios.



中文翻译:

野兔大麦 (Hordeum murinum subsp. leporinum) 对气候变化的表观遗传反应:一种基于性状的实验方法

气候变化模型预测的降雨量减少和温度升高对植物群落的影响将取决于植物物种适应和适应新环境条件的能力。适应过程主要由表观遗传调控驱动,包括不影响核苷酸序列的基因组结构和化学修饰。在植物中,最著名的表观遗传机制之一是胞嘧啶甲基化。我们评估了降雨量减少 30%(以下称为“干旱”处理;D)、气温升高 3°C(“变暖”;W)以及 D 和 W (WD) 的组合对表型和表观遗传变异性的影响鼠大麦亚兔属L.,一种与地中海农林业系统高度相关的草种。在位于西班牙西南部的类似大草原的生态系统中进行了全因子实验。鼠血吸虫表现出很大的表型可塑性以响应气候条件。经受较温暖条件(即 W 和 WD 处理)的植物开花较早,而那些经受复合胁迫 (WD) 的植物表现出更高的每单位叶质量叶面积投资(即更高的 SLA)并产生更重的种子。我们的结果还表明,甲基化的水平和模式随气候处理而显着变化,与 D 和 W 单独促进的相比,D 和 W 的组合诱导明显不同的表观遗传反应。这项工作取得的主要结论表明,在未来气候变化情景下,基因表达的表观遗传调控对于维持稳态和功能稳定性具有潜在作用。

更新日期:2021-02-19
down
wechat
bug