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陆地生态系统中植物和微生物C₁代谢之间的进化和功能关系

Kolby J Jardine¹, Linnea K Honeker², Zhaoxin Zhang³

¹Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA, 94720, USA.

The New phytologist

|August 7, 2025

概括

使用S-adenosyl methionine (SAM) 的单碳 (C1) 代谢对植物和微生物生命至关重要. 这一途径将二氧化碳同化和营养循环联系起来,与微生物的潜在起源以及对系外行星生物特征的含义.

科学领域:

生物化学生物化学
植物生理学植物生理学
微生物的新陈代谢

背景情况:

使用S-adenosyl methionine (SAM) 的单碳 (C1) 代谢对于植物和微生物的生物合成,氧化还原平衡和应激适应至关重要.
一种新型的光合作用C1途径通过RuBisCO将SAM甲基与二氧化碳同化集成,将和硫代谢联系起来.
依赖光的SAM合成可以调节甲基化,减轻光呼吸应激,并影响植物对环境变化的反应.

研究的目的:

探索植物和微生物中C1代谢的作用和进化起源.
研究C1代谢与光合作用,营养循环和应激反应的整合.
突出C1代谢在陆地碳循环和天体生物学中的重要性.

主要方法:

核心C1代谢酶的遗传学分析.
审查拟议的光合作用C1通路及其与其他代谢过程的整合.
讨论C1流量量化的实时气体传感方面的进展.

主要成果:

遗传学数据表明,C1代谢酶的微生物起源是通过对陆地植物进行内共生基因转移而产生的.
C1代谢驱动了大量的生物圈和大气之间的挥发性化合物的交换.
S-甲基氨酸作为移动C1代谢物,将C1循环连接到地面和地下.

结论:

C1代谢是陆地碳和营养循环的未被认可但至关重要的组成部分.
微生物祖先和C1代谢的挥发性生产为生命起源和系外行星生物签名检测提供了洞察力.
对C1代谢的进一步研究可以促进我们对植物应激反应和全球生物地球化学循环的理解.

关键词:

C1光合作用过程中的光合作用全球碳和营养循环.甲氨酸的使用方法甲基转化成甲基的方法一个碳代谢的一个碳代谢.摄影呼吸是一种摄影呼吸.植物微生物相互作用氧化还原调节的调节

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