Document Type
Article
Publication Date
2019
DOI
10.1656/058.018.0110
Publication Title
Southeastern Naturalist
Volume
18
Issue
1
Pages
147-164
Abstract
We evaluated whether geographic distance and soil characteristics influence genetic structure of nitrogen-fixing bacterial symbionts associated with the host plant Chamaecrista fasciculata (Partridge Pea). We tested phylogeographic clustering and associations between genetic distance, geographic distance, and soil variables using sequences of 2 bacterial genes and soil chemistry across 23 sites in Mississippi. We identified rhizobia isolated from Partridge Pea as Bradyrhizobium. We detected significant genetic structure at a regional level, and determined that rhizobia within each region were more phylogenetically related than expected. Significant correlation between genetic distance and distances based on soil chemistry suggests environmental influences on rhizobia diversity. High levels of diversity among rhizobia over small spatial scales suggest that symbionts respond to local factors. Understanding geographic diversity in natural assemblages of rhizobia aids in predicting how hosts and symbionts respond to environmental perturbations.
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Original Publication Citation
Dorman, H. E., & Wallace, L. E. (2019). Diversity of nitrogen-fixing symbionts of Chamaecrista fasciculata (Partridge pea) across variable soils. Southeastern Naturalist, 18(1), 147-164. doi:10.1656/058.018.0110
Repository Citation
Dorman, Hanna E. and Wallace, Lisa E., "Diversity of Nitrogen-Fixing Symbionts of Chamaecrista fasciculata (Partridge Pea) Across Variable Soils" (2019). Biological Sciences Faculty Publications. 382.
https://digitalcommons.odu.edu/biology_fac_pubs/382
Voucher information and GPS coordinates of locations containing Chamaecrista fasciculata sampled for this study.