Determining the taxonomic position of Bradyrhizobium species isolated from the root nodules of Acacia dealbata

The research presented in aimed to determine the taxonomic position of Bradyrhizobium species isolated from the root nodules of Acacia dealbata, Acacia decurrens and Acacia mearnsii in a previous study. Additionally, we aimed to increase the knowledge of Bradyrhizobium diversity occurring in the root nodules of A. mearnsii, A. dealbata and A. decurrens growing in invasive settings. This was achieved through phenotypic analysis, genealogical concordance analysis and Multilocus sequence analysis of various housekeeping genes. While, phylogeographic inferences regarding the symbiotic properties were made based on phylogenetic analysis of sequences of the common nodulation gene nodA.

本研究旨在确定从先前研究中分离自金合欢属植物白合欢（Acacia dealbata）、金合欢（Acacia decurrens）和密花合欢（Acacia mearnsii）根瘤中的Bradyrhizobium物种的分类地位。此外，本研究还旨在扩展对在入侵环境中生长的A. mearnsii、A. dealbata和A. decurrens根瘤中存在的Bradyrhizobium多样性的认识。通过表型分析、谱系一致性分析和多个管家基因的多位点序列分析，实现了这一目标。同时，基于常见根瘤基因nodA的序列系统发育分析，对共生特性的系统地理推断亦得以实现。