Invasive Ageratina adenophora can maintain its ecological advantages over time through releasing its autotoxicity by accumulating a bacterium Bacillus cereus.

侵袭性腺叶黄素可以通过积累细菌蜡状芽孢杆菌释放其自毒作用 ， 从而随着时间的推移保持其生态优势。

• 影响指数: 3.776
• 发表时间: Jan 2023
• 来源期刊: Heliyon
• DOI: 10.1016/j.heliyon.2022.e12757
• PMID: 36685395
• 文章类型: Journal Article
• 作者列表: Wu AP,Bai ZX,Li J,Liu H,Chen FL,Zhang MY,Wang YH,Balah MA,Wen JH

关键词: Advantage; Autotoxicity; Bacterium; Decline; Detoxification; Invasion; Over time; Release

Abstract

Plant invasive success is attributed to invaders\' ecological advantages over their native neighbors. However, increasing evidence suggests that these advantages are expected to attenuate over time because of natural enemy accumulation, ecological evolution of native species and autotoxicity. We determined how an invasive Ageratina adenophora could remain its competitive advantages over time by avoiding its autotoxicity. Our results highlighted that the autotoxicity of A. adenophora in its invaded soil was reduced by some microbes. Moreover, an autotoxic allelochemical, 2-coumaric acid glucoside, detected in the invaded soil, demonstrated distinctly autotoxic effects on its seed germination and seedling growth. However, the autotoxic effects were greatly alleviated by a bacterium Bacillus cereus, accumulated by A. adenophora. Furthermore, the allelochemical could be almost completely degraded by B. cereus within 96 h. Accordingly, we speculate that A. adenophora could aggregate B. cereus to release its autotoxicity maintaining its competitive advantages over time.

摘要

植物入侵的成功归因于入侵者相对于其本地邻居的生态优势。然而,越来越多的证据表明，由于天敌的积累，这些优势预计会随着时间的推移而减弱，本地物种的生态进化和自毒作用。我们确定了侵入性的Ageratina腺植物如何通过避免其自毒作用来保持其竞争优势。我们的结果表明，一些微生物降低了A在其入侵土壤中的自毒作用。此外，一种自毒化感化学物质,2-香豆酸葡萄糖苷，在入侵的土壤中检测到，对其种子萌发和幼苗生长表现出明显的自毒作用。然而,细菌蜡样芽孢杆菌大大减轻了自毒作用，由A.Adenophora积累。此外，化感化学物质可以在96小时内被蜡样芽孢杆菌几乎完全降解。因此，我们推测，随着时间的推移，A.adenophora可以聚集B.cereus释放其自毒，保持其竞争优势。