Zhang Fengjuan, Sun Jianru, Wang Chang, Li Chunying, Chen Fengxin, Xu Haiyun, Chen Xue
College of Life Science, Hebei University, Baoding, Hebei, China.
School of Life Sciences, Fudan University, Shanghai, China.
Front Plant Sci. 2023 Jan 12;13:1069016. doi: 10.3389/fpls.2022.1069016. eCollection 2022.
can help plants to acquire nutrients either directly or indirectly. However, the role of community on the competitive growth of invasive is poorly understood. Native is often found in areas that have been invaded by . We sought to determine whether the quantitative and/or qualitative differences in the community present on the invasive and native provide a competitive advantage to the invasive over native species. A field experiment was established to imitate the invasion of . The 16S rRNA gene was commercially sequenced to identify the bacilli isolated from the rhizosphere soil of field-grown and . The communities in their rhizosphere were compared, and their effects on the competitive growth of and were tested in the pot experiments. in the rhizosphere soil of significantly enhanced its intra-specific competitive ability. The relative abundance of in the rhizosphere soil of was significantly higher than that of . Inoculation with that was isolated from the rhizosphere soil of both and significantly enhanced the relative competitiveness of and inhibited that of . The higher abundance of in the rhizosphere of creates higher levels of available nutrients than that in the native , which enhance the competitive growth of . The result helps to discover the mechanism of community in the invasion of .
可直接或间接帮助植物获取养分。然而，群落对入侵植物竞争生长的作用却知之甚少。本地植物常出现在已被入侵植物侵占的区域。我们试图确定入侵植物和本地植物根际存在的细菌群落的数量和/或质量差异是否为入侵植物提供了相对于本地物种的竞争优势。开展了一项田间试验来模拟入侵情况。对16S rRNA基因进行商业测序，以鉴定从田间种植的入侵植物和本地植物根际土壤中分离出的杆菌。比较了它们根际的细菌群落，并在盆栽试验中测试了这些群落对入侵植物和本地植物竞争生长的影响。入侵植物根际土壤中的细菌显著增强了其种内竞争能力。入侵植物根际土壤中该细菌的相对丰度显著高于本地植物。接种从入侵植物和本地植物根际土壤中均分离出的该细菌，显著增强了入侵植物的相对竞争力并抑制了本地植物的竞争力。入侵植物根际中该细菌的较高丰度比本地植物根际创造了更高水平的有效养分，这增强了入侵植物的竞争生长。该结果有助于揭示细菌群落在入侵植物入侵过程中的机制。
