Correction: Deep Evolutionary Comparison of Gene Expression Identifies Parallel Recruitment of Trans-Factors in Two Independent Origins of C4 Photosynthesis

There is an error in the first sentence of the Materials and Methods. The correct sentence is: C. gynandra was grown in soil under long-day conditions in a cabinet with light intensity of 350 μmol photons m-2 s-1 and a temperature of daytime 23°C/20°C