Fig. 3From: Influence of light-emitting diodes on phenylpropanoid biosynthetic gene expression and phenylpropanoid accumulation in Agastache rugosaRosmarinic acid content in A. rugosa after exposes to various LED lights at different time intervals (1, 2, and 3 weeks). Each of the three individual experimental groups was analyzed by using HPLC. Error bars represent standard deviation values. Significant difference are highlighted with *P < 0.05 and **P < 0.01. DW, dry weightBack to article page