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amyloplast

The Columbia Encyclopedia, Sixth Edition

amyloplast , also called leucoplast, a nonpigmented organelle, or plastid, occurring in the cytoplasm of plant cells. Amyloplasts transform glucose, a simple sugar, into starch through the process of polymerization, and store starch grains within their stretched membranes. Especially large numbers occur in subterranean storage tissues of some plants, such as the common potato.

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The Columbia Encyclopedia, Sixth Edition. Copyright 2008 Columbia University Press

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Related entries from encyclopedias, dictionaries, and thesauruses

	amyloplast amyloplast A plastid that synthesizes and stores starch , to the exclusion of other activities. Read more
	amyloplast amyloplast An organelle in plants that stores starch. Amyloplasts are often found in nonphotosynthetic tissue, such as roots and storage tubers. Read more
	leucoplast see amyloplast . Read more
	statolith statolith 1. See statocyst . 2. A membrane-bound group of starch grains (see amyloplast ) in plant cells that is believed to act as a sensor to gravity. Starch statoliths are found in cells at the root tips and in the... Read more