I am not sure about exactly what will happen after one hour, it may be too soon to notice anything. But over a longer period of time, the germinating seeds will absorb oxygen and release carbon dioxide during the respiration process. The soda lime should then absorb the carbon dioxide that is produced while the seeds keep absorbing oxygen. Over time, the amount of oxygen in the test tube will decrease, which will cause the indicator fluid to move towards the test tube due to lower pressure.