See also: Hypocotyl Hypothesis Hypocrite Hypocritical Hypocrisy Hypotonic Hypothesize Hypothermia Hypothecation Hypoxic Hypogeal Hypotaxis Hypophora Hypophysis Hypoxemia Hypoxemic Hypothetical Hypodermis Hypoechoic Hypothalamus Hypostatize Hypochondria Hypoglycemia Hypo Hypotonia
1. Hypocotylis [ˈhīpəkädl, ˌhīpəˈkädl] NOUN
HYPOCOTYLIS [ˈhīpəkädl, ˌhīpəˈkädl]
hypocotyls synonyms, hypocotyls pronunciation, hypocotyls translation, English dictionary definition of hypocotyls. hypocotyl bean seed germinating n. The part of a plant embryo or seedling plant that is between the cotyledons and the radicle or root.
hypocotyl [ hī ′pə-kŏt′l ] The part of a plant embryo or seedling that lies between the radicle and the cotyledons. Upon germination, the hypocotyl pushes the cotyledons above the ground to develop.
Eudicots. After emergence of the radicle, the hypocotyl emerges and lifts the growing tip (usually including the seed coat) above the ground, bearing the embryonic leaves (called cotyledons ), and the plumule that gives rise to the first true leaves. The hypocotyl is the primary organ of extension of the young plant and develops into the stem .
A lens focusses the light from O, on the hypocotyl, and that from O', on the tip of the cotyledon. Contrary to generally accepted view the hypocotyl not only perceives but responds to light. If the cotyledon be shaded and the light be permitted to fall on one side of the hypocotyl, no heliotropic curving takes place.