What metabolic processes does a dormant embryo in a seed carry out?
Seeds will not germinate, either because of a lack of favourable conditions, seed hibernation, or because of a genetically pre-determined physical or physiological mechanism preventing germination before a specific period or event. In addition to not germinating due to those factors, seeds can also experience dormancy.
With these germination preventing mechanisms in place, the seed will not germinate in the absence of specific triggers. But the seed viability period is limited in which it germinates if the trigger is available.
If any, what metabolic processes do seeds carry out in their dormant/hibernating state, on cessation of which, the seed becomes non-viable?
Does the embryo in a dessicated dormant seed respire, excrete, ingest etc, though with a reduced speed? If it does, is the depletion of the respiratory substrate which results in termination of seed viability?