Lu Anhuai, Liu Jia, Xu Meiying, Zhou Shungui, Liu Juan, Liu Fanghua, Nie Yong, Ding Hongrui, Li Yan
Beijing Key Laboratory of Mineral Environmental Function, Peking University, Beijing 100871, China.
Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510070, China.
Fundam Res. 2024 Feb 8;5(4):1584-1596. doi: 10.1016/j.fmre.2023.12.014. eCollection 2025 Jul.
This review focuses on new approaches adopted by microorganisms to acquire energy in oligotrophic and low-energy hydrosphere habitats, which involves increasing income, reducing expenditure and cooperation among different microorganisms. The various energy sources, electron transfer pathways and carbon, nitrogen, and sulfur cycles are involved in these processes. Specifically, this review delves into the potential molecular mechanisms on microbes utilizing photoelectrons from semiconducting minerals in natural photocatalytic systems. Also, it aims to reveal the regulation mechanisms of photoelectrons on interspecific electron transfer pathways and the energy synthesis processes in and sulfate reducing bacteria, as well as the molecular mechanisms of perception and adaptation to different potentials of extracellular receptors and changes of oxygen gradients. Moreover, it demonstrates the network structure, formation and mechanisms of long-distance electron transfer driven by cable bacteria, particularly in the context of reducing CH and NO coupled with the increase of dimethyl sulfide. This paper attempts to put forward new ideas for the energy utilization by microorganisms and their impact on element cycle in the hydrosphere, which contributes to a better understanding of the energy metabolism in interspecific, interspecies, and ecosystem contexts during the cycle-coupled processes of elements.
本综述聚焦于微生物在贫营养和低能量水圈生境中获取能量所采用的新方法，这涉及增加收入、减少支出以及不同微生物之间的合作。这些过程涉及各种能源、电子传递途径以及碳、氮和硫循环。具体而言，本综述深入探讨了微生物在天然光催化系统中利用半导体矿物的光电子的潜在分子机制。此外，它旨在揭示光电子对种间电子传递途径和产甲烷菌及硫酸盐还原菌能量合成过程的调控机制，以及细胞外受体对不同电位的感知和适应机制以及氧梯度变化的分子机制。此外，它展示了由索细菌驱动的长距离电子传递的网络结构、形成和机制，特别是在减少CH和NO以及二甲基硫增加的背景下。本文试图为微生物的能量利用及其对水圈元素循环的影响提出新观点，这有助于更好地理解元素循环耦合过程中种内、种间和生态系统背景下的能量代谢。
