由NFP促进的根结交的融合进化
Christina Finegan1, Heather R Kates2,3, Robert P Guralnick3,4
1School of Forest, Fisheries and Geomatic Sciences, University of Florida, Gainesville, FL 32611.
概括
诺德因子感知 (NFP) 基因家族的演变趋同,表明了植物微生物共生的多个独立起源. 这挑战了单增益模型,表明了植物中固化的复杂进化途径.
科学领域:
- 进化生物学是进化的生物学.
- 植物科学 植物科学
- 微生物学 微生物学
背景情况:
- 植物与固细菌之间的共生关系的演化是生物学的一个关键领域.
- 假设包括多个独立的收益和损失与单个收益相比,其次是根结节共生损失.
- 了解信号基因的演变,如Nod Factor Perception (NFP),至关重要.
研究的目的:
- 重建参与植物微生物信号传递的NFP基因的进化历史.
- 区分根结交的单个和多个起源的假设.
- 为了研究NFP的融合进化的分子基础.
主要方法:
- 在血管精子中对NFP基因家族的家族基因分析.
- 合成分析用于调查基因复制事件.
- NFP基因演变的比较进化重建.
主要成果:
- 证据表明NFP基因的演变趋同,这表明脂-胆酸糖 (LCO) 信号的多个独立起源.
- 在Cucurbitales和Rosales中确定了并列重复,创建了NFP1和NFP2组.
- 证明了大规模的重复导致Fabaceae中的MtNFP和MtLYR1,可能来自整个基因组的重复.
结论:
- 该NFP基因家族显示融合进化,支持基于NFP的LCO信号的多个独立收益.
- 这种分子融合为固植物中观察到的根结节共生的多重独立收益提供了机制.
- 挑战了先前的模型,这些模型表明NFP在固分类中的单一祖先重复事件.
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