The methylation of GA
The Arabidopsis GA methyltransferase 2 gene (GAMT2) is expressed in the bent cotyledon stage during the embryo development, as shown by in situ hybridization. The establishment of embryo pattern is completed at this developmental stage, from which on the seeds undergo desiccation to prepare for the dormancy. The high expression level of GAMT2 at this stage indicates that GA is largely methylated to reach an appropriate balance between GA and ABA. See pages 368-381 for more details.