amyloplast


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Related to amyloplast: Elaioplast

amyloplast

(ăm`əlōplăst'), 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.

amyloplast

[′am·ə·lō‚plast]
(botany)
A colorless cell plastid packed with starch grains and occurring in cells of plant storage tissue.
References in periodicals archive ?
Structure and presence of the amyloplast membrane proteins, puroindolines, are associated with wheat grain hardness.
There is an exception concerning amyloplast formation during the bicellular stage of some grasses, such as Sorghum bicolor, in which the plastids next to the tapetum accumulate starch before those that are far from the tapetum do (Christensen & Homer, 1974).
In plants, sedimentable amyloplasts have been conceived of, since the turn of the century, as potential statoliths (Haberlandt, 1900; Nemec, 1900).
In Mo17, however, both endosperm cell division and amyloplast initiation appears to be equally heat labile.
1992) and may hold these two proteins to the lipidrich surface of the amyloplast membrane, transiently attached to the starch granule.
Starch is synthesized and accumulated in amyloplasts, a polymer formed by the association of two polysaccharides: amylose (approximately 25% of the total content) and amylopectin (the remaining 75%), the main component of starch granules (Zeeman, Kossmann, & Smith, 2010).
They have a dense cytoplasm with irregular shape filled with numerous small vesicles, oil body, abundant amyloplasts and a prominent centrally placed nucleus (Fig.
Transmission electron microscopy showed that cells of the yellow friable callus had dense cytoplasm, nuclei with prominent nucleoli, a large number of amyloplasts, and absence of vacuoles.
A complete ferredoxin/thioredoxin system regulates fundamental processes in amyloplasts," Proceedings of the National Academy of Sciences of the United States of America, vol.
ABA has been detected in every major organ of plant from the root cap to the apical bud and synthesized in almost all cells that contain chloroplast and amyloplasts.
Starch has been found to serve as the predominant energy reserve in other well-studied secretory structures (Fahn 1979, Paiva & Machado 2008), and the juxtaposition of mitochondria and amyloplasts indicate the energy need for starch hydrolysis, as discussed by Paiva & Machado (2008).