Unsolved mysteries in marine nitrogen fixation.

IF 14 1区 生物学 Q1 BIOCHEMISTRY & MOLECULAR BIOLOGY
Trends in Microbiology Pub Date : 2024-06-01 Epub Date: 2023-08-30 DOI:10.1016/j.tim.2023.08.004
Jonathan P Zehr, Douglas G Capone
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引用次数: 0

Abstract

Biological nitrogen (N2) fixation is critical in global biogeochemical cycles and in sustaining the productivity of the oceans. There remain many unanswered questions, unresolved hypotheses, and unchallenged paradigms. The fundamental balance of N input and losses has not been fully resolved. One of the major N2-fixers, Trichodesmium, remains an enigma with intriguing biological and ecological secrets. Cyanobacterial N2 fixation, once thought to be primarily due to free-living cyanobacteria, now also appears to be dependent on microbial interactions, from microbiomes to unicellular symbioses, which remain poorly characterized. Nitrogenase genes associated with diverse non-cyanobacterial diazotrophs (NCDs) are prevalent, but their significance remains a huge knowledge gap. Answering questions, new and old, such as those discussed here, is needed to understand the ocean's N and C cycles and their responses to environmental change.

海洋固氮的未解之谜。
生物固氮(N2)在全球生物地球化学循环和维持海洋生产力方面至关重要。目前仍有许多未解之谜、悬而未决的假设和未受质疑的范式。氮输入和流失的基本平衡问题尚未完全解决。其中一种主要的 N2 固定生物--蓝细菌(Trichodesmium)仍然是一个谜,蕴藏着引人入胜的生物学和生态学秘密。蓝藻的 N2 固定曾经被认为主要是由自由生活的蓝藻造成的,但现在似乎也依赖于微生物的相互作用,从微生物群到单细胞共生体,其特征仍然不甚明了。与各种非蓝藻重氮营养体(NCDs)相关的氮酶基因非常普遍,但它们的重要性仍然是一个巨大的知识空白。要了解海洋的氮和碳循环及其对环境变化的反应,就必须回答本文讨论的新老问题。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Trends in Microbiology
Trends in Microbiology 生物-生化与分子生物学
CiteScore
25.30
自引率
0.60%
发文量
193
审稿时长
6-12 weeks
期刊介绍: Trends in Microbiology serves as a comprehensive, multidisciplinary forum for discussing various aspects of microbiology, spanning cell biology, immunology, genetics, evolution, virology, bacteriology, protozoology, and mycology. In the rapidly evolving field of microbiology, technological advancements, especially in genome sequencing, impact prokaryote biology from pathogens to extremophiles, influencing developments in drugs, vaccines, and industrial enzyme research.
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