在海洋沉积物中的巨型多细胞磁触性原核生物
Elsa C A Turrini1, Christian Godon1, Marine Bergot1
1Université Aix-Marseille, CNRS, CEA, BIAM, UMR7265 Institut de Biosciences and Biotechnologies d'Aix-Marseille, CEA Cadarache, F-13108 Saint-Paul-lez-Durance, France.
The ISME journal
|February 13, 2026
概括
研究人员在地中海发现了一种新的海洋细菌形态,巨大的多细胞磁触性原核生物,这是一个新的海洋细菌形态. 这些细菌使用磁性晶体进行导航,并代表了多细胞性进化的重要发现.
科学领域:
- 微生物学 微生物学
- 海洋生物学 海洋生物学
- 进化生物学 进化生物学
背景情况:
- 多细胞磁触性核细胞是使用铁磁纳米晶体进行导航的海洋细菌.
- 以前,只有球形和圆形形态型,大约3-6微米,由~50个细胞组成,是已知的.
- 这些细菌属于Desulfobacterota类中的三个属,居住在减少的海洋沉积物中.
研究的目的:
- 报告发现了一种新型,显著更大的多细胞磁触性 prokaryotes 的形态型.
- 为了研究这种新形态的细胞超结构,生态和生理学.
- 为了确定这些巨型细菌的遗传位置.
主要方法:
- 使用磁性丰富技术将细菌分离出来.
- 传输电子显微镜和共聚焦显微镜被用来检查细胞超结构.
- 为了分类,进行了单个联盟的基因组学和家族基因组学分析.
主要成果:
- 在地中海中发现了一种新的巨型多细胞磁触性 prokaryotes 的形态,大约比以前已知的形式大30倍.
- 这些联盟平均包含130个细胞,每个细胞产生100多个灰色磁体.
- 遗传学分析将这些细菌置于Candidatus Magnetomoraceae家族中的一个新属和物种Magnetogigantoglobus mediterraneus中.
结论:
- 发现Magnetogigantoglobus mediterraneus扩大了众所周知的多细胞磁触性 prokaryotes 的多样性.
- 这些巨型细菌,尽管有遗传分歧和不同的超结构,但与其他形态类型共享诸如硫酸盐减少等生理特征.
- 这些发现有助于理解 prokaryotes 中的多细胞性和磁毒性演变.
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