Evidence map›Paper›PMID 42185977›Full record

ArticleBMC plant biology2026

Aeschynomene americana induces terminal bacteroid differentiation in Bradyrhizobium sp. USDA3516, a novel model for dalbergioid-rhizobium symbiosis.

T Scott Carlew, Annika P Atherton Puri, Ashley Shim, Camilo Parada Rojas, Riley A Buchanan, Jeff H Chang, Joel L Sachs, Brittany J Belin

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Article in BMC plant biology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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1 · What the graph read from it

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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

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3 · Its place in the literature

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4 · The record

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5 · Who and what money

Authors and funding

8 authors.

T Scott CarlewDepartment of Embryology, Carnegie Science, Baltimore, MD, 21218, USA.
Annika P Atherton PuriDepartment of Embryology, Carnegie Science, Baltimore, MD, 21218, USA.
Ashley ShimDepartment of Embryology, Carnegie Science, Baltimore, MD, 21218, USA.
Camilo Parada RojasDepartment of Botany and Plant Pathology, Oregon State University, Corvallis, OR, 97331, USA.
Riley A BuchananDepartment of Botany and Plant Pathology, Oregon State University, Corvallis, OR, 97331, USA.
Jeff H ChangDepartment of Botany and Plant Pathology, Oregon State University, Corvallis, OR, 97331, USA.ORCID http://orcid.org/0000-0002-1833-0695
Joel L SachsDepartment of Ecology, Evolution, and Organismal Biology, UC Riverside, Riverside, CA, 92521, USA.ORCID http://orcid.org/0000-0002-0221-9247
Brittany J BelinDepartment of Embryology, Carnegie Science, Baltimore, MD, 21218, USA. belin@carnegiescience.edu.ORCID http://orcid.org/0000-0002-1837-3214

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundThe paradigms of legume-rhizobium symbiosis are derived primarily from conserved features of Inverted-Repeat Lacking Clade (IRLC) legumes and closely related species. The Dalbergioids diverged from the IRLC early in legume evolution and possess unique symbiotic features but few genetically tractable models. The small, diploid dalbergioid Aeschynomene americana (American jointvetch) has promise as a genetic model for Dalbergioid-rhizobia symbiosis, yet only a few studies have examined its symbiotic properties.

resultsWe examined the symbiont range of A. americana from central Florida and characterized a native A. americana nodule isolate, Bradyrhizobium sp. USDA3516. We find that A. americana forms effective symbioses with Bradyrhizobium sp. USDA3516, which is closely related to Thai A. americana symbiont Bradyrhizobium sp DOA9, and with symbionts from the dalbergioids stylo and peanut. Interestingly, several strains that effectively nodulated A. americana exhibited branched bacteroid morphologies, but we found that branching was neither necessary nor sufficient for effective symbiosis.

conclusionsOur study contradicts the prevailing view that bacteroid shape is a major determinant of symbiotic efficiency and presents the A. americana-Bradyrhizobium sp. USDA3516 interaction as an optimal model of A. americana symbiosis.

Indexed as

BradyrhizobiumFabaceaeSymbiosisModels, BiologicalPhylogenyRoot Nodules, PlantAeschynomeneBacteroid differentiationBradyrhizobiaDalbergiaLegume–rhizobium symbiosis

Identifiers

PMID42185977
PMCPMC13386809

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