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Survival on railway tracks of Geranium robertianum—a glyphosate-tolerant plant
Ecotoxicology ( IF 2.7 ) Pub Date : 2021-06-10 , DOI: 10.1007/s10646-021-02430-5
Olga Bemowska-Kałabun , Agnieszka Bogucka , Bogusław Wiłkomirski , Małgorzata Wierzbicka

Geranium robertianum is a herbaceous plant that prefers shady and fertile forest habitats. However, it also occurs on railway tracks, where there are difficult conditions for plant growth and regular herbicide spraying (in high concentrations, twice a year). One of the most commonly used herbicides in railway areas is glyphosate. The effect of the glyphosate on the G. robertianum plants found on railway tracks and in nearby forests in north-eastern Poland was checked. The aim of the study was to explain how G. robertianum can survive on railway tracks despite spraying with the glyphosate. Increased tolerance to the glyphosate of the G. robertianum plants from track populations was demonstrated compared to the plants from forest populations that had not previously been in contact with the herbicide. After 35 days after treatment with the herbicide, 75% of the plants from the observed forest populations withered, while only 38% did from the track populations. Ultrastructure of plant leaf cells from forest populations was strongly disturbed, which was not observed in plants from track populations. It was also shown that plants from track populations accumulated more glyphosate and AMPA in their tissues than plants from forest populations. The obtained results indicate that long-term use of herbicides may cause formation of biotypes of plants resistant to a given herbicide. This fact explains the possibility of G. robertianum occurring on railway tracks, despite spraying with the glyphosate. It is also a manifestation of microevolutionary processes.



中文翻译:

天竺葵在铁轨上的生存——一种耐草甘膦植物

Geranium robertianum是一种草本植物,喜欢阴凉肥沃的森林栖息地。然而,它也发生在铁路轨道上,那里的植物生长和定期喷洒除草剂(高浓度,一年两次)条件困难。铁路地区最常用的除草剂之一是草甘膦。检查了草甘膦对波兰东北部铁路轨道和附近森林中发现的G. robertianum植物的影响。该研究的目的是解释G. robertianum如何在喷洒草甘膦的情况下仍能在铁路轨道上存活。增加对G. robertianum草甘膦的耐受性与之前未接触过除草剂的森林种群的植物相比,来自追踪种群的植物被证明。用除草剂处理 35 天后,观察到的森林种群中 75% 的植物枯萎,而径迹种群中只有 38% 的植物枯萎。来自森林种群的植物叶细胞的超微结构受到强烈干扰,这在来自追踪种群的植物中未观察到。研究还表明,来自追踪种群的植物在其组织中积累的草甘膦和 AMPA 比来自森林种群的植物更多。获得的结果表明,长期使用除草剂可能会导致形成对给定除草剂具有抗性的植物生物型。这个事实解释了G. robertianum的可能性尽管喷洒了草甘膦,但仍发生在铁路轨道上。它也是微进化过程的一种表现。

更新日期:2021-07-22
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