New Phytologist 189 (2011), 647–649.
Since its publication, it has been brought to our attention that there are two citation errors in the References to Harman (2011). The year of publication of Vargas WA, Crutcher FK, Kenerley CM. 2010 should read 2011 and in Vargas et al. (2009) the names of the co-authors are incorrect. The correct citation is:
Vargas WA, Mandawe JC, Kenerley CM. 2009. Plant-derived sucrose is a key element in the symbiotic association between Trichoderma virens and maize plants. Plant Physiology 151: 792–808.
We apologize to our readers for these mistakes.