The immediate effects of polyploidization of <i>Spirodela polyrhiza</i> change in a strain-specific way along environmental gradients.

Although there is a clear trend of elevated Fv/Fm values under higher stress, the difference between benign and stressed is only significant for the tetraploids of line 9346, and for the benign and 3 g/L for strain 0013 (see Supplementary Table S4 ).

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Photosynthesis The non-photochemical quenching (NPQ) along the Cd gradient is fairly constant, nevertheless, we did detect a small but significant interaction effect between strain and condition (see Table 1 ).

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The corresponding contrasts are all highly significant ( p adj < 0.0001, see Supplementary Tables S3 and S4 ).

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