植物通过感知气体扩散来监测屏障的完整性，这一成果由赫尔辛基大学Ari Pekka Mhnen团队经过不懈努力而取得。该研究于2025年7月2日发表于国际一流学术期刊《自然》杂志上。

在这里，课题组报道了拟南芥根的周皮完整性是通过气体乙烯和氧气的扩散来感知的。外周损伤后，乙烯通过伤口泄漏，氧气进入，导致乙烯信号和缺氧信号的衰减。这种情况促进根部的周皮再生。当再生完成，屏障完整性重新建立，损伤前的乙烯水平和缺氧信号恢复。气体扩散监测的另一个主题是在表皮受损后重建花序茎中的屏障。他们提出，植物以气体扩散为主题，作为监测和重建屏障完整性的一般原则。

研究人员表示，屏障组织将生物体与周围环境隔离开来。维持组织的完整性对这一功能至关重要。在许多种子植物中，周皮在二次生长过程中形成外部屏障，以防止水分流失和病原体感染。当损伤后其完整性丧失时，包皮再生；然而，尽管其对植物的生存很重要，其潜在的机制仍然很大程度上未知。

附：英文原文

Title: Plants monitor the integrity of their barrier by sensing gas diffusion

Author: Iida, Hiroyuki, Abreu, Isidro, Lpez Ortiz, Jennifer, Peralta Ogorek, Lucas Len, Shukla, Vinay, Mkel, Meeri, Lyu, Munan, Shapiguzov, Alexey, Licausi, Francesco, Mhnen, Ari Pekka

Issue&Volume: 2025-07-02

Abstract: Barrier tissues isolate organisms from their surrounding environment. Maintaining the integrity of the tissues is essential for this function. In many seed plants, periderm forms as the outer barrier during secondary growth to prevent water loss and pathogen infection1. The periderm is regenerated when its integrity is lost following injury; however, the underlying mechanism remains largely unknown, despite its importance for plant survival. Here we report that periderm integrity in Arabidopsis roots is sensed by diffusion of the gases ethylene and oxygen. Following injury of the periderm, ethylene leaks out through the wound and oxygen enters, resulting in attenuation of ethylene signalling and hypoxia signalling. This condition promotes periderm regeneration in the root. When regeneration is complete and barrier integrity is re-established, pre-injury levels of ethylene and hypoxia signalling are regained. Gas diffusion monitoring is also used to re-establish the barrier in inflorescence stems after the epidermis is injured. We thus propose that gas diffusion is used by plants as a general principle to monitor and re-establish barrier integrity.

DOI: 10.1038/s41586-025-09223-4

Source: https://www.nature.com/articles/s41586-025-09223-4