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Questions and Answers
In endospermic dicots, the food reserves are stored in the cotyledons.
False
Tobacco, tomato, and pepper are examples of non-endospermic dicots.
False
In non-endospermic dicots, the endosperm food reserves are quickly remobilized and moved into the developing cotyledon for storage.
True
Peanut seeds and split peas are examples of individual cotyledons loaded with food reserves.
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Maria Elena Zavala is working to combat world hunger by manipulating plants to improve their nutritional qualities.
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Study Notes
Eudicot Seeds Structure
- Seeds are protected by a seed coat formed from the ovule’s integument.
- The seed coat consists of two layers: the outer testa and the inner tegmen.
- The hilum marks the seed's point of attachment to the endocarp, the fruit's inner layer.
- The micropyle is located near the hilum and is where the pollen tube enters the seed.
Embryo Component Overview
- The embryonic axis, or root-shoot axis, extends the length of the embryo.
- The plumule signifies the young shoot apex with a shoot apical meristem and developing leaves (leaf primordia).
- The radicle represents the embryonic root, which may not always be visible in all species.
Additional Embryonic Structures
- The hypocotyl is the segment between cotyledon attachment and radicle, meaning "below the cotyledons."
- The epicotyl is found between cotyledon attachment and shoot tip, meaning "above the cotyledons," and may be absent in some embryos with cotyledons attached at the shoot tip.
- Vascular tissue (xylem and phloem) connects the two cotyledons to the rest of the embryo.
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Description
Test your knowledge on the anatomy of eudicot seeds! Learn about the different layers and structures found in these seeds, such as the seed coat, hilum, and micropyle. Challenge yourself and see how well you understand the intricate details of eudicot seeds.
