Document Type
Article
Publication Date
12-2020
DOI
10.3390/plants9121719
Publication Title
Plants
Volume
9
Pages
1-20 pp.
Abstract
In natural plant populations, a fine-scale spatial genetic structure (SGS) can result from limited gene flow, selection pressures or spatial autocorrelation. However, limited gene flow is considered the predominant determinant in the establishment of SGS. With limited dispersal ability of bacterial cells in soil and host influence on their variety and abundance, spatial autocorrelation of bacterial communities associated with plants is expected. For this study, we collected genetic data from legume host plants, Chamaecrista fasciculata, their Bradyrhizobium symbionts and rhizosphere free-living bacteria at a small spatial scale to evaluate the extent to which symbiotic partners will have similar SGS and to understand how plant hosts choose among nodulating symbionts. We found SGS across all sampled plants for both the host plants and nodulating rhizobia, suggesting that both organisms are influenced by similar mechanisms structuring genetic diversity or shared habitat preferences by both plants and microbes. We also found that plant genetic identity and geographic distance might serve as predictors of nodulating rhizobia genetic identity. Bradyrhizobium elkanii was the only type of rhizobia found in nodules, which suggests some level of selection by the host plant.
Rights
© 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
Original Publication Citation
Hosseinalizadeh Nobarinezhad, M., & Wallace, L. E. (2020). Fine-scale patterns of genetic structure in the host plant Chamaecrista fasciculata (Fabaceae) and its nodulating rhizobia symbionts. Plants, 9, 1-20, Article 1719. https://doi.org/http://dx.doi.org/10.3390/plants9121719
Repository Citation
Hosseinalizadeh Nobarinezhad, Mahboubeh and Wallace, Lisa A., "Fine-Scale Patterns of Genetic Structure in the Host Plant Chamaecrista fasciculata (Fabaceae) and Its Nodulating Rhizobia Symbionts" (2020). Biological Sciences Faculty Publications. 418.
https://digitalcommons.odu.edu/biology_fac_pubs/418
ORCID
0000-0002-2280-1250 (Hosseinalizadeh Nobarinezhad)