Seeds and germination
Dicotyledons have two embryonic leaves (cotyledons), while monototyledons have only one.
germination, bean, maize plant, monocot, dicotyledon, cotyledon, core, seed coat, plumule, radicle, embryo, endosperm, leaf, maize ear, plant, angiosperm, biology
- corn seed
Angiosperms can be grouped into monocots and dicots according to the number of cotyledons they possess.
Bean seeds have 2 cotyledons, which contain the stored food reserves of the seed.
The embryo develops between the cotyledons. Its two main parts are the plumule and the radicle. The former grows into the root of the new plant, while the latter develops into the stem and the leaves, that is, the shoot.
Maize, or corn, is a monocotyledon, that is, its seed contains only one cotyledon. Its function is to transport nutrients from the endosperm to the embryo. The endosperm stores the food required for the development of the embryo, which, in case of maize, is starch. We can easily observe the embryo in the maize seed, with the plumule and the radicle.
During germination, the seed absorbs water and swells. Then the pericarp opens and the radicle starts to develop into the root. In dicots the developing plumule pushes cotyledons above the ground, while in monocots the cotyledon stays underground.
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The two groups of angiosperms are monocots and dicots.
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One of the most important monocot crops.
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The animation demonstrates the different flower types of angiosperms.
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