Thursday, March 14, 2013

Seed Structure and Function

My baby corn are monocot seeds and my baby tomatos are dicot seeds. Here is the differences between monocots and dicots:
Monocots: embryo with single cotyledon, pollen with single furrow or pore, flower parts in multiples of threes, major leaf veins parallel, stem vascular bundles scattered, adventitious roots, and secondary growth absent. Other examples of monocots are rice, wheat, bamboo, banana, ginger, onion, garlic, lilies, daffodils, iris, orchids, bluebells, tulips, and amaryllis.
Dicots: embryo with two cotyledons, pollen with three furrows or pores, flower parts in multiples of fours or fives, major leaf veins reticulated, stem vascular bundles in a ring, roots developed from radicle, and secondary growth is often present. Other examples of dicots are magnolias, nutmeg, cinnamon, avocado, black pepper, water lily, star anise, and hornwort.

Monocot and dicot seeds contain an embryo which has a cotyledon, epicotyl, and hypocotyl. They also have an endosperm and seed coat. The seed coat forms the wall of the embryo sack and protects the seed. The endosperm is a food supply for the baby seed and contains 3 sets of chromosomes. The embryo is the immature plant, the cotyledon is the seed leaf that first emerges, and the radicle is the root.

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