Canadian Medical Guide > Organisms > Plants > Plant Components > Plant Components, Aerial > Plant Shoots Terms and Definitions

Plant Shoots

Medical Definition:	New immature growth of a plant including stem, leaves and tips of branches.
Guide Notes:	for new root growth use MERISTEM; coord with specific plant
Previously Indexed:	Plants (1966-1994)

Plant Shoots Categories.

	Cotyledon - A part of the embryo in a seed plant. The number of cotyledons is an important feature in classifying plants. In seeds without an endosperm, they store food which is used in germination. In some plants, they emerge above the soil surface and become the first photosynthetic leaves. (From Concise Dictionary of Biology, 1990)
	Hypocotyl - The region of the stem beneath the stalks of the seed leaves (cotyledons) and directly above the young root of the embryo plant. It grows rapidly in seedlings showing epigeal germination and lifts the cotyledons above the soil surface. In this region (the transition zone) the arrangement of vascular bundles in the root changes to that of the stem. (From Concise Dictionary of Biology, 1990)
	Meristem - A group of plant cells that are capable of dividing infinitely and whose main function is the production of new growth at the growing tip of a root or stem. (From Concise Dictionary of Biology, 1990)

Plant Shoots Medical Definitions and Terms

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