入侵植物紫茎泽兰化感作用及其途径研究

紫茎泽兰广泛入侵中国西南地区，研究结果表明化感作用是其入侵的重要武器，但其化感作用的途径并不十分清楚。本研究中，我们发现紫茎泽兰可以通过多种途径对两种栽培植物大麦和玉米的生长产生化感作用，这些途径包括了叶挥发物、叶淋溶物以及根分泌物。并且在紫茎泽兰幼苗早期就可以检测到这些化感作用。然而，没有实验证据表明紫茎泽兰落叶的微生物降解物对两种测试植物具有化感作用。

Allelopathic Potential and Pathway of an Invasive Weed Eupatorium adenophorum (Asteraceae)

Crofton weed ( Eupatorium adenophorum) is one of the most notoriously invasive plants in China. Allelopathy has been considered to play an important role for population spread. In this study, we demonstrate that this weed has strong adverse effects on two agronomic cultivars, barley and maize, through a variety of allelopathic pathways including volatiles, leachates and root exudates. The allelopathic effect was even detected in early growth stages of the weed. However, there was no evidence to indicate that allelochemicals in dead leaf tissue either persisted or converted into new allelochemicals by naturally colonizing phyllosphere microbes.