Grains have endosperm in mature seed, but trees don’t.

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Presentation transcript:

Grains have endosperm in mature seed, but trees don’t. = stored food Embryo = baby plant Grains have endosperm in mature seed, but trees don’t. All nutrients in embryo, including cotyledons. http://www.lima.ohio-state.edu/biology/images/zeaseed.jpg

Epigeous germination in honey locust. http://www.uky.edu/Ag/Horticulture/kytreewebsite/Propagation/schoolprojects/seedling%20emergence%20project.htm Epigeous germination in honey locust. Cotyledons above ground for photosynthesis. Typical of most tree species.

Hypogeous germination in oak. Fleshy cotyledons remain below ground. http://www.uky.edu/Ag/Horticulture/kytreewebsite/Propagation/schoolprojects/seedling%20emergence%20project.htm Hypogeous germination in oak. Fleshy cotyledons remain below ground. Stored food provides E to produce root system.