Figure 2.

Endogenous hormone content change in different development stages during symbiotic and asymbiotic germination of Dendrobium officinale seeds. (A) GA₃/ABA ratio in different stage between symbiotic and asymbiotic germination; (B) IAA/ABA ratio; (C) ZT/ABA ratio; (D) JA/ABA ratio. Mean and SE values were calculated from at least three replicates. Asterisks indicate significant differences in same development stage between asymbiotic and symbiotic germination according to the t-test (* p < 0.05 and ** p < 0.001). AG, asymbiotic germination; SG, symbiotic germination.