Fig. 9.

The proposed working model through which DA-6 promotes germination and seedling establishment from aged soybean seeds. In the aged soybean seeds, the transition from triacylglycerol to fatty acid and glycerol and then to the soluble sugars was blocked in the absence of DA-6. The application of exogenous DA-6 treatment in aged soybean seeds promoted the transcription of several key genes and elevated the activity of invertase which is involved in this pathway. Taken together, this model revealed that DA-6 promotes the germination and seedling establishment from aged soybean seeds by increasing the hydrolysis of triacylglycerol and the conversion of fatty acids and glycerol to sugars.