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. 2023 Jan 4;290(1990):20222153. doi: 10.1098/rspb.2022.2153

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© 2023 The Authors.

Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited.

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Figure 1. — Evidence for partner choice: more beneficial symbionts form more nodules in one- and two-strain inocula. Nodules occupied by a mEGFP-labelled Mesorhizobium strain in a (a) darkfield image and (b) with Blue LP filter. (c) Darkfield, Blue LP and TXR overlay image of nodules containing strains marked with mEGFP and mScarlet-l. (d) Shoot mass of Acmispon wrangelianus SM2A9 in symbiosis with a one-strain inoculation of each Mesorhizobium strain. Bars, mean effects +/− s.e.; dotted lines, +/− one s.e. for plant shoot mass in the absence of any rhizobia. More beneficial Mesorhizobium strains form more nodules in (e) one-strain inoculations and in (f) two-strain inoculations of A. wrangelianus. Filled circles, genotype mean values for each Mesorhizobium strain. Black line, linear regression. Grey shading, 95% confidence interval.