Arbuscular mycorrhizal fungi are a double-edged sword in plant invasion controlled by phosphorus concentration
Arbuscular mycorrhizal fungi are a double-edged sword in plant invasion controlled by phosphorus concentration
复制标题
丛枝菌根真菌是磷浓度控制植物入侵的双刃剑
DOI：
10.1111/nph.16359
复制
发表时间：
2020-01-02
期刊：
影响因子：
9.4
通讯作者：
Peng, Shaolin
中科院分区：
文献类型：
--
作者：
Chen, Enjian;Liao, Huixuan;Peng, Shaolin
一些外来植物的入侵成功取决于与丛枝菌根 (AM) 真菌的关联，这些真菌的范围从强互利共生到寄生，经常受到土壤磷 (P) 可用性的影响。目前尚不清楚磷的有效性如何改变本地植物和入侵植物的 AM 关联，从而影响它们的竞争。在这项工作中，我们进行了三因素普通花园实验，包括磷利用率、AM真菌发生和种间竞争的操纵，以评估AM真菌如何影响不同磷利用率下两对入侵植物和本地植物之间的竞争。我们的结果表明，富磷减少了 AM 对本地和入侵植物生长的积极影响。竞争对入侵植物上的 AM 定植没有影响，但减少了本地植物上的 AM 定植，这导致入侵植物在低磷处理下获得更大的 AM 益处，但与本地竞争者相比，在高磷处理下受到更强的 AM 损害。因此，AM真菌在低磷处理下增强了入侵植物与本地植物的竞争优势，但在高磷处理下削弱了入侵植物的竞争优势。我们的工作强调了在未来的研究中将土壤微生物和养分有效性之间的相互作用纳入植物入侵的必要性。由于 AM 共生的宿主特异性相对较低，AM 真菌可以与非本地栖息地的入侵物种形成共生关系，即使它们缺乏与这些新宿主的共同进化历史（Moora 等，2011；Dickie 等，2017）。植物和 AM 真菌之间的相互作用可能会促进入侵植物在新栖息地的建立、持续存在和优势地位，从而增强物种的入侵性（Pringle 等，2009；Menzel 等，2017）。先前的研究表明，碳和矿物质养分可以通过常见的菌根网络从本地植物转移到入侵植物（Carey等人，2004年；Awaydul等人，2019年）。因此，与本地物种相比，AM 对入侵物种的益处更大，可能是 AM 诱导植物入侵的重要驱动因素。
The invasion success of some exotic plants depends on associations with arbuscular mycorrhizal (AM) fungi, which range along a continuum from strong mutualism to parasitism frequently affected by soil phosphorus (P) availability. It is unclear how P availability shifts AM associations on native and invasive plants, which in turn influence their competition. In this work, we conducted a three-factor common garden experiment, including manipulations of P availability, AM fungi occurrence and interspecific competition to evaluate how AM fungi influence competition between two pairs of invasive and native plants under different P availabilities. Our results showed that P enrichment reduced positive AM effects on the growth of both native and invasive plants. Competition had no effect on AM colonization on the invasive plants, but reduced AM colonization on the native plants, which led invasive plants to receive greater AM benefits under low-P treatment, but to be exposed to stronger AM detriments under high-P treatment compared to the native competitors. Therefore, the competitive advantage of invasive vs native plants was enhanced by AM fungi under low-P treatment, but weakened under high-P treatment. Our work highlights the necessity to incorporate the interaction between soil microbes and nutrient availability on plant invasion in future studies. Due to relatively low host specificity of AM symbioses, AM fungi can form symbiotic associations with invasive species in nonnative habitats even though they lack a co-evolutionary history with these new hosts (Moora et al., 2011; Dickie et al., 2017). Interactions between plants and AM fungi may enhance species invasiveness by facilitating the establishment, persistence and dominance of invasive plants in new habitats (Pringle et al., 2009; Menzel et al., 2017). Previous studies showed that carbon and mineral nutrients can be transferred from native plants to invasive plants via common mycorrhizal networks (Carey et al., 2004; Awaydul et al., 2019). Thus, greater AM benefits on the invasive than the native species may be an important driver of AM-induced plant invasion.