由于大气中二氧化碳的升高导致重新编程,导致森林树木的种子蛋白质和营养质量下降
Barbara Karpinska1,2, Rosa Sanchez-Lucas1,2, Andrew Plackett1,2
1School of Biosciences, College of Life and Environmental Sciences, University of Birmingham Edgbaston, Birmingham B15 2TT, UK.
Plant physiology
|September 30, 2025
概括
大气中二氧化碳 (CO2) 的升高会对树种子质量产生负面影响,增加植物酸盐含量,降低蛋白质含量. 这项研究揭示了在高二氧化碳条件下子转录组和蛋白质组的显著变化.
科学领域:
- 环境科学 环境科学
- 植物生物学 植物生物学
- 生物化学 生物化学
背景情况:
- 大气二氧化碳水平的上升为植物生长带来了一些好处.
- 然而,二氧化碳对种子质量的有害影响往往被低估.
- 树种子 () 是一个重要的食物来源和标志物种.
研究的目的:
- 研究二氧化碳增加对成熟树 (Quercus robur) 种子质量的影响.
- 在高CO2下分析中的蛋白质和植物酸盐含量变化.
- 通过蛋白质组学和转录组学来探索这些变化的分子基础.
主要方法:
- 分析了在环境二氧化碳 (aCO2) 和高二氧化碳 (eCO2) 条件下生长的成熟树的子.
- 使用量化无标签蛋白质组学来识别和量化子蛋白质.
- 用RNA测序 (RNA-seq) 来分析基因表达的变化.
主要成果:
- 与aCO2相比,来自eCO2条件的呈现出更高的植物酸盐含量和较低的蛋白质含量.
- 蛋白质组分析显示了蛋白质丰度的变化,一些蛋白质在eCO2下变得无法检测或独特地检测到.
- 转录组分析显示了基因表达的显著变化,与转录因子,植物激素信号和三糖代谢相关的转录的丰度增加.
结论:
- 升高的CO2显著改变了树的蛋白质组和转录组.
- 这些分子变化对种子的新陈代谢产生了重大影响,影响了蛋白质和植物酸盐水平.
- 这些发现突出了未来气候情景下对食物网动态和森林再生的潜在风险.
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