required for maintaining normal embryogenesis. Embryo polarity, for example, is ensured by
the directional movement of auxin that is controlled by various types of auxin transporters.
Here, we present pieces of evidence for the auxin-gibberellic acid (GA) hormonal crosstalk
during embryo development and the regulatory role of the Arabidopsis thaliana Calcium-
Dependent Protein Kinase-Related Kinase 5 (AtCRK5) in this regard. It is pointed out that …