Hosts winnow symbionts with multiple layers of absolute and conditional discrimination mechanisms
In mutualism, hosts select symbionts via partner choice and preferentially direct more resources to symbionts that provide greater benefits via sanctions. At the initiation of symbiosis, prior to resource exchange, it is not known how the presence of multiple symbiont options (i.e. the symbiont social environment) impacts partner choice outcomes. Furthermore, little research addresses whether hosts primarily discriminate among symbionts via sanctions, partner choice or a combination. We inoculated the legume, Acmispon wrangelianus, with 28 pairs of fluorescently labelled Mesorhizobium strains that vary continuously in quality as nitrogen-fixing symbionts. We find that hosts exert robust partner choice, which enhances their fitness. This partner choice is conditional such that a strain's success in initiating nodules is impacted by other strains in the social environment. This social genetic effect is as important as a strain's own genotype in determining nodulation and has both transitive (consistent) and intransitive (idiosyncratic) effects on the probability that a symbiont will form a nodule. Furthermore, both absolute and conditional partner choice act in concert with sanctions, among and within nodules. Thus, multiple forms of host discrimination act as a series of sieves that optimize host benefits and select for costly symbiont cooperation in mixed symbiont populations.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2023 |
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| Erschienen: |
2023 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:290 |
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| Enthalten in: |
Proceedings. Biological sciences - 290(2023), 1990 vom: 11. Jan., Seite 20222153 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Montoya, Angeliqua P [VerfasserIn] |
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| Links: |
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| Themen: |
Host discrimination |
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| Anmerkungen: |
Date Completed 05.01.2023 Date Revised 04.04.2023 published: Print-Electronic Dryad: 10.5061/dryad.bk3j9kdgd figshare: 10.6084/m9.figshare.c.6328053 Citation Status MEDLINE |
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| doi: |
10.1098/rspb.2022.2153 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| 500 | |a figshare: 10.6084/m9.figshare.c.6328053 | ||
| 500 | |a Citation Status MEDLINE | ||
| 520 | |a In mutualism, hosts select symbionts via partner choice and preferentially direct more resources to symbionts that provide greater benefits via sanctions. At the initiation of symbiosis, prior to resource exchange, it is not known how the presence of multiple symbiont options (i.e. the symbiont social environment) impacts partner choice outcomes. Furthermore, little research addresses whether hosts primarily discriminate among symbionts via sanctions, partner choice or a combination. We inoculated the legume, Acmispon wrangelianus, with 28 pairs of fluorescently labelled Mesorhizobium strains that vary continuously in quality as nitrogen-fixing symbionts. We find that hosts exert robust partner choice, which enhances their fitness. This partner choice is conditional such that a strain's success in initiating nodules is impacted by other strains in the social environment. This social genetic effect is as important as a strain's own genotype in determining nodulation and has both transitive (consistent) and intransitive (idiosyncratic) effects on the probability that a symbiont will form a nodule. Furthermore, both absolute and conditional partner choice act in concert with sanctions, among and within nodules. Thus, multiple forms of host discrimination act as a series of sieves that optimize host benefits and select for costly symbiont cooperation in mixed symbiont populations | ||
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a Research Support, Non-U.S. Gov't | |
| 650 | 4 | |a Research Support, U.S. Gov't, Non-P.H.S. | |
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| 650 | 4 | |a indirect genetic effects | |
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| 700 | 1 | |a Wendlandt, Camille E |e verfasserin |4 aut | |
| 700 | 1 | |a Benedict, Alex B |e verfasserin |4 aut | |
| 700 | 1 | |a Roberts, Miles |e verfasserin |4 aut | |
| 700 | 1 | |a Piovia-Scott, Jonah |e verfasserin |4 aut | |
| 700 | 1 | |a Griffitts, Joel S |e verfasserin |4 aut | |
| 700 | 1 | |a Porter, Stephanie S |e verfasserin |4 aut | |
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