Nature Plants 3, 17097 (2017); published 26 June 2017; corrected 17 July 2017.

The Supplementary Information files originally published with this Letter were not the intended final versions. The Supplementary Information PDF and Supplementary Tables 3, 5 and 6 have now been updated to fix a number of cosmetic problems. No data have been affected and there have been no changes in meaning.