Fig 1. Effect of low temperature exposure of maize seedlings on leaf phenotype.

A. The scale for visual scoring of tolerance to low temperature exposure was as follows: 1 –severe leaf damage, large proportion of dry / dead tissue, severe wilting; 2 –intermediate level of leaf damage, some discolored / dry tissue, primarily on the edges and tips of the leaf; 3 –minimal / no leaf damage, no discoloration, minimal wilting. B. Diverse maize lines vary in their response to low temperature exposure.