Advantages of Biochemical Production in Plants -

1. Production of the biomass (or the culture filtrate for the externally secreted products) from which the desired biochemical is to be purified is called upstream production.
Upstream production costs are much lower in case of plants than in micro-organisms.

2. The cellular environment of plants, on the other hand, is as good as that of animals for post-translational modification and folding of the proteins so that animal proteins recovered from plants are usually at least as good as the native animal proteins.

3. Plant seeds could be stored under ambient conditions from which the proteins may be isolated as per need. This would greatly reduce storage costs of the products.
4. Biochemical production from transgenic animals raises several public and ethical concerns, while no such problem is associated with plants.