一个碳-负反循环是cnidarian-Symbiodiniaceae共生的重复演变的基础
Guoxin Cui1, Jianing Mi2,3, Alessandro Moret4
1King Abdullah University of Science and Technology (KAUST), Biological and Environmental Science and Engineering Division, Red Sea Research Center, Thuwal, 23955-6900, Saudi Arabia. guoxin.cui@kaust.edu.sa.
Nature communications
|November 2, 2023
概括
昆虫宿主通过共享的碳-反循环来控制共生藻类 (Symbiodiniaceae). 这种机制通过将光合作用生产与同化联系起来来调节共生体的生长,解释了这些关键共生体的重复进化.
科学领域:
- 海洋生物学 海洋生物学
- 共生关系是共生关系.
- 分子机制的分子机制
背景情况:
- 与Symbiodiniaceae的Cnidarian共生很普遍,但它们的调节是不太了解的.
- 这些共生体在珊瑚,海和水母之间独立演化表明了潜在的保存机制.
- 控制共生体密度和鱼类-Symbiodiniaceae伙伴关系的重复演变的分子基础仍然难以捉摸.
研究的目的:
- 为了研究控制虫-Symbiodiniaceae共生中的共生生殖的分子机制.
- 为了确定一个保存的碳-反循环是否调节不同类型的类动物之间的共生体密度.
- 阐明共生体光合作用和废物的宿主同化作用.
主要方法:
- 进行了营养补充实验 (碳水化合物和氨).
- 使用稳定同位素 (C和N) 的高分辨率代谢分析.
- 研究了谷氨酸合成酶-谷氨酸合成酶途径在氨基酸生物合成中的作用.
主要成果:
- 昆虫宿主利用一个保存的碳-负反循环来调节共生体密度.
- 交生体衍生的光合作用物通过谷氨酸合成酶-谷氨酸合成酶通路被纳入宿主氨基酸生物合成.
- 碳水化合物补充剂降低了共生体密度,而氨促进了繁殖,证实了宿主控制.
结论:
- 一个一般的碳-负反循环控制着虫-Symbiodiniaceae的共生,不论它们的独立进化起源如何.
- 这种保守的机制为这些重要的共生关系的反复演变提供了温和的解释.
- 主体对营养可用性的代谢调节是维持共生平衡的关键.
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