Corn and other grasses (monocots) have a special sheath of cells called a coleoptile which surrounds the true leaves. On germination, this coleoptile is first to emerge from the ground and provides protection for the young tender meristem of the first true leaf which then emerges from within it (see diagram). As we shall see later, oat coleoptiles are famous for being used in experiments on growth hormones. See also: 'Types of Seed Germination - Epigeal and Hypogeal'
31 March 2011
Hypogeal Germination of Monocot, Corn ('Zea mays') Produces Coleoptile
In monocots, such as corn and grasses, only one cotyledon is present. At germination, this remains below ground (hypogeal germination), permanently in the grain, and in direct contact with the large endosperm. COLEOPTILE PROTECTS THE SHOOT TIP 
Corn and other grasses (monocots) have a special sheath of cells called a coleoptile which surrounds the true leaves. On germination, this coleoptile is first to emerge from the ground and provides protection for the young tender meristem of the first true leaf which then emerges from within it (see diagram). As we shall see later, oat coleoptiles are famous for being used in experiments on growth hormones. See also: 'Types of Seed Germination - Epigeal and Hypogeal'
Corn and other grasses (monocots) have a special sheath of cells called a coleoptile which surrounds the true leaves. On germination, this coleoptile is first to emerge from the ground and provides protection for the young tender meristem of the first true leaf which then emerges from within it (see diagram). As we shall see later, oat coleoptiles are famous for being used in experiments on growth hormones. See also: 'Types of Seed Germination - Epigeal and Hypogeal'
Subscribe to:
Post Comments (Atom)
No comments:
Post a Comment