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In a non-endospermic dicot such as the pea, where do the food reserves end up?
AThey stay in the endosperm until germination
BThey move into the hardened seed coat layers
CThey stay in the ovary wall around the seed
DThey move into the developing cotyledons
Answer & Solution
Correct answer: D. They move into the developing cotyledons
1. In a non-endospermic dicot the triploid endosperm develops normally after double fertilisation.
2. Its food reserves are then quickly remobilised and moved into the developing cotyledon for storage.
3. The two halves of a peanut seed and the split peas of split pea soup are individual cotyledons loaded with those reserves.
4. In endospermic dicots such as tobacco, tomato and pepper, the reserves instead stay in the endosperm.
5. In those seeds the two cotyledons act as absorptive organs, much as the scutellum does in monocots.
6. The seed coat and the ovary wall are protective tissues and never serve as the reserve store.
_Source: OpenStax Biology (1st ed., CC BY 4.0), Ch 32 "Plant Reproduction", section 32.2 Pollination and Fertilization_
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