Oxalic acid is the most ubiquitous and common low molecular weight organic acid produced by living organisms. Oxalic acid is produced by fungi, bacteria, plants, and animals. The aim of this review is to give an overview of current knowledge about the microbial cycling of oxalic acid through ecosystems. Here we review the production and degradation of oxalic acid, as well as its implications in the metabolism for fungi, bacteria, plants, and animals. Indeed, fungi are well known producers of oxalic acid, while bacteria are considered oxalic acid consumers. However, this framework may need to be modified, because the ability of fungi to degrade oxalic acid and the ability of bacteria to produce it, have been poorly investigated. Finally, we will highlight the role of fungi and bacteria in oxalic acid cycling in soil, plant and animal ecosystems.

草酸是由生物体产生的最普遍和最常见的低分子量有机酸。草酸是由真菌，细菌，植物和动物产生的。这篇综述的目的是概述草酸通过生态系统的微生物循环的最新知识。在这里，我们回顾了草酸的产生和降解，以及其对真菌，细菌，植物和动物的代谢的影响。确实，真菌是草酸的众所周知的生产者，而细菌被认为是草酸的消费者。但是，由于尚未充分研究真菌降解草酸的能力和细菌产生草酸的能力，因此可能需要修改此框架。最后，我们将强调真菌和细菌在土壤，植物和动物生态系统中草酸循环中的作用。