Are the invasive Acacia melanoxylon and Eucalyptus globulus drivers of other species invasion? Testing their allelochemical effects on germination

IF 1.9 3区 农林科学 Q2 FORESTRY New Forests Pub Date : 2023-09-16 DOI:10.1007/s11056-023-10001-1
Sheila F. Riveiro, Óscar Cruz, Otilia Reyes
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Abstract

Abstract Many invasive alien species (IAS) produce secondary metabolites that affect how other plants function (allelopathic compounds) and can drive other species invasion, as proposed by the invasional meltdown hypothesis. Acacia melanoxylon and Eucalyptus globulus are two of such species. In this study, we analyzed the germination response of seven IAS ( Acacia dealbata , Acacia mearnsii , Acacia melanoxylon , Acacia longifolia , Eucalyptus globulus , Paraserianthes lophantha , Phytolacca americana ) and a native biotest species ( Lactuca sativa ) to the application of two different aqueous extracts at two different concentrations of donor species A. melanoxylon and E. globulus . Extract compounds were identified by UHPLC-ESI-QTOF-MS. Eucalyptus aqueous extracts significantly reduced germination in three species ( A. dealbata, E. globulus, P. americana ). The germination of all the species tested was reduced with acacia aqueous extracts. Our results support the postulates of the Biochemical Recognition Hypothesis in that seeds gauge establishment potential based on phytochemical release of other plants. Furthermore, A. melanoxylon and E. globulus lowered their own germination, suggesting that these species exhibit intraspecific biochemical recognition. We also found support for the Novel Weapons Hypothesis in the case of L. sativa as a native species. Our research shows that phytochemicals are a component of plant-plant interactions, including the invasion process.
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入侵的黑刺槐和蓝桉是其他物种入侵的驱动因素吗?测定其对发芽的化感作用
许多外来入侵物种(IAS)产生次生代谢物(化感化合物),影响其他植物的功能,并可以驱动其他物种的入侵,这是入侵熔毁假说提出的。黑胶刺槐和蓝桉就是其中的两种。在本研究中,我们分析了7种植物(Acacia dealbata, Acacia mearnsii, Acacia melanoxylon, Acacia longfolia, Eucalyptus globulus, Paraserianthes lophantha, Phytolacca americana)和一种本地生物试验物种(lacuca sativa)在两种不同浓度的供体植物a . melanoxylon和E. globulus的两种不同水浸提液的萌发反应。采用UHPLC-ESI-QTOF-MS对提取物成分进行鉴定。桉树水提液显著降低了三种植物(A. dealbata, E. globulus, P. americana)的萌发率。金合欢水提取物降低了所有被试物种的萌发率。我们的研究结果支持生物化学识别假说的假设,即种子根据其他植物的植物化学释放来衡量建立潜力。此外,黑梭梭和绿梭梭降低了自己的发芽,这表明这些物种表现出种内生化识别。我们还发现了对新武器假说的支持,在L. sativa作为一个本地物种的情况下。我们的研究表明,植物化学物质是植物与植物相互作用的一个组成部分,包括入侵过程。
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来源期刊
New Forests
New Forests 农林科学-林学
CiteScore
5.00
自引率
9.10%
发文量
48
审稿时长
3 months
期刊介绍: New Forests publishes original papers on the fundamental and applied aspects of afforestation and reforestation for a broad international audience of scientists and practitioners. Journal articles concern the reproduction of trees and forests originating from seed, planted seedlings or coppice for the purposes of resource protection, timber production, and agro-forestry. Natural and artificial methods of regeneration and all stand structures from even-aged to uneven-aged are considered. Topics include general silviculture, plant physiology, genetics, biotechnology, ecology, economics, protection, and management of all stages in the process of afforestation and reforestation.
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