Correction to: Nature Plants https://doi.org/10.1038/s41477-019-0422-z, published online 06 May 2019.

In the version of this Letter originally published, several in-text figure citations were written incorrectly: in the sentence beginning “To validate genetically that two...”, “Fig. 3b” should have read “Fig. 3e”; in the sentence beginning “In a j2 mutant background...”, “Fig. 3c” should have read “Fig. 3f”; in the sentence beginning “Quantitative differences in branching...”, “Fig. 3d” should have read “Fig. 3g”; and in the sentence beginning “Importantly, higher EJ2 gene dosage...”, “Fig. 3c,d” should have read “Fig. 3f,g”. These errors have now been amended.