Black mustard plants use old weapons for chemical warfare in their new range

Black mustard (Brassica nigra) uses glucosinolate compounds to allelochemically suppress its competitors. This native Eurasian species has successfully invaded North America, raising the question of whether its chemical weapons have changed in the invasion process and made black mustard plants more competitive in their new range. Oduor et al. show that extracts from invasive and native black mustard plants similarly suppressed root growth of seedlings of competitor species native to North America and Europe. Thus, they conclude that the invasive North American mustard plants still use their old weapons to suppress new competitors.

Ayub M. O. Oduor et al. 2020. Allelopathic effects of native and invasive Brassica nigra do not support the novel‐weapons hypothesis. American Journal of Botany https://doi.org/10.1002/ajb2.1516

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黑芥菜植物在新范围内使用旧武器进行化学战

黑芥末（Brassica nigra）使用芥子油苷化合物化感抑制其竞争者。这个欧亚大陆物种成功入侵了北美，引发了一个问题，即其化学武器在入侵过程中是否发生了变化，并使黑芥菜植物在新范围内更具竞争力。Oduor等。结果表明，入侵和本地黑芥菜植物的提取物同样抑制了北美和欧洲本地竞争品种的幼苗的根部生长。因此，他们得出结论，入侵的芥菜工厂仍然使用旧武器来压制新的竞争对手。

Ayub MO Oduor等。2020年。天然和侵入性芸苔属的化感作用不支持新武器假说。美国植物学杂志https://doi.org/10.1002/ajb2.1516