从绿色到红色:城市热力压力推动了叶子颜色的进化
Yuya Fukano1, Wataru Yamori2, Hayata Misu2
1Graduate School of Horticulture Sciences, Chiba University, Chiba, Japan.
Science advances
|October 20, 2023
概括
城市热岛会导致更高的温度,但植物会适应. 红叶植物在炎热的城市中壮成长,而绿叶植物更喜欢凉爽的地区,显示了Oxalis corniculata的适应性进化.
科学领域:
- 植物生物学 植物生物学
- 生态生态学 生态生态学
- 进化生物学是进化的生物学.
背景情况:
- 城市地区会形成热岛,导致气温上升.
- 城市植物对热应激的适应反应尚不清楚.
- 牛 (Oxalis corniculata) 呈现了叶子颜色多态 (绿色和红色).
研究的目的:
- 调查Oxalis corniculata的叶子颜色变化是否与城市热应激有关.
- 为了确定红色与绿色叶子在不同热环境中的适应意义.
主要方法:
- 在地方,景观和全球范围内进行现场观测.
- 在不同温度下进行生长和光合作用实验.
- 全基因组SNP分析以推断进化历史.
主要成果:
- 绿叶牛 (Oxalis corniculata) 占据了较冷,更绿的息地.
- 红叶个体在温暖的城市息地更为普遍.
- 红叶植物在热压下表现优越,而绿叶植物在非压力条件下表现出色.
- SNP分析表明,红叶来自绿色祖先的多个独立起源.
结论:
- 叶子颜色变化在Oxalis corniculata是一种适应城市热岛的适应性反应.
- 红叶代表城市环境中适应热应激的适应.
- 这些发现表明,城市植物的耐热性发生了趋同的演变.
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