在克莱普托塑料恐龙鞭状体中,猎物偏好与光合作用性能有关
Norico Yamada1, Bernard Lepetit2, David G Mann3,4
1Department of Biology, University of Konstanz, Konstanz, Germany. norico.yamada@uni-konstanz.de.
The ISME journal
|June 30, 2023
概括
称为"dinotoms"的dinoflagellates可以使用各种藻作为kleptoplastids. 杜林斯基 (Durinskia capensis) 选择性地保留了必要的藻,以实现充分的光合作用和碳固定.
科学领域:
- 海洋生物学 海洋生物学
- 这种共生是共生.
- 光合作用 光合作用
背景情况:
- 克里普托佩里迪尼亚科 (Kryptoperidiniaceae) 家庭中的恐龙,或"恐龙",藻内生共生体.
- 这些恐龙存在于三个进化阶段:短暂的形,多个永久的内共生体,和一个永久的内共生体.
- 像Durinskia capensis这样的克莱普塑性恐龙,提供了一个独特的模型来研究宿主-猎物代谢和遗传融合.
研究的目的:
- 研究Durinskia capensis的克莱普托塑性行为.
- 确定宿主和藻猎物的代谢和遗传整合.
- 分析不同藻物种如何影响D. capensis的光合作用能力.
主要方法:
- 观察Durinskia capensis在各种藻物种上食.
- 测量D. capensis和捕食藻类的光合作用能力.
- 在摄入的藻有机体中分析基因表达 (psbC和RuBisCO).
主要成果:
- D. capensis利用不同的藻物种作为具有不同光合作用效率的克莱普托塑体.
- 完全的光合作用,包括光反应和卡尔文循环,只有在必不可少的藻Nitzschia captiva中才能维持.
- 补充性藻如Nitzschia inconspicua提供ATP和NADPH,但缺乏用于碳固定的RuBisCO基因表达.
结论:
- D. capensis 拥有专门的碳固定代谢系统,依赖于必需的藻.
- 补充藻作为灵活的"紧急供应"用于能源生产,当必要的藻稀缺时.
- 这种选择性代谢策略凸显了恐龙和它们的藻内共生体之间的复杂的共同进化动态.
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