amyloplast


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Related to amyloplast: Elaioplast

am·y·lo·plast

(am'i-lō-plast),
A granule in the protoplasm of a plant cell that is the center of a starch-forming process and starch storage.
Synonym(s): amylogenic body
[amylo- + G. plastos, formed]

amyloplast

a type of cell inclusion found in many plant tissues, particularly storage organs such as the potato tuber. Amyloplasts contain starch enclosed in a UNIT MEMBRANE, the whole structure being a type of LEUCOPLAST. Besides serving as a starch store, amyloplasts are thought by some scientists to function also as a gravity-seeking device, helping the roots to push through the soil in the correct direction (see GEOTROPISM).
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References in periodicals archive ?
In differentiated cells, plastids can be involved in anabolism (chloroplasts) or in storing reserves in amyloplasts and elaioplasts (Wheatley, 1977).
Amyloplast sedimentation, the putative first step of the response chain (Sack, 1991), was investigated in vibratome sections after starch was stained with Lugol solution.
The vegetative cell cytoplasm is very dense, filled with numerous small vesicles, mitochondria, lipidic globules, amyloplasts and ERr with extended cisternae.
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.
Cai et al., "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. It is a 15-carbon compound that resembles the terminal portion of some carotenoid molecules.
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).
If polarized light microscopy is included, it can be used as a tool to identify plant material on the basis of the Maltese cross evident in amyloplasts when viewed with crossed polars and the birefringence exhibited by cellulosic fibers (for complete instructions for a lab on polarized light microscopy, see McMahon, 2004).
Proteomic characterization of wheat amyloplasts using identification of proteins by tandem mass spectrometry.
Physiological stress expressed by salinity during this period reduces the storage capacity of cereal kernels by decreasing the number of endosperm cells and/or the number of amyloplasts initiated (Jones et al., 1996).