Fig. 4.

Proline dehydrogenase (PDH) activity (unit/mg protein) of dark germinated barley sprouts of cultivars Pinnacle (A) and Celebration (B) at day 2, day 4, and day 6 following seed elicitor treatments (GroPro and COS). Different lowercase letters indicate significant differences in PDH activity between cultivar × treatment interactions, during the corresponding sampling time point, at 95% confidence level. Bars without lowercase letters do not have statistical significant differences between cultivar × treatment interactions at 95% confidence level