New Phytologist 199 (2013), 541–549.
Since its publication, the authors of Rúa et al. (2013) have brought to our attention an error in Fig. 3(b) of their article. The key in panel (b) incorrectly described the closed columns as representing +P, and the open columns as −P, when it should indicate: closed columns, −P; open columns, +P. This error was introduced during the formatting of the figures for final publication: the content, results and conclusions of the research described were based on the correct figure and no other aspect of the article was affected by this error. The correct figure is shown below.
We apologize to our readers for this mistake.