Amyloplast

Amyloplast

. Amyloplasts also convert this starch into sugar, for when the plant needs energy. In the day, in plants, there is more sugar than starch present. At night, there is more starch than sugar present.

Large numbers of amyloplasts can be found in underground storage tissues of some plants, such as potato.Amyloplasts are derived from plastids, which are a specialized class of cellular organs. The plastids carry their own genome and are believed to be descendants of cyanobacteria (blue-green algae) which formed a symbiotic relationship with the eukaryotic cell.

In the root cap (a tissue at the tip of the root) some specialized amyloplasts are thought to be involved in the perception of gravity by the plant (gravitropism). These specialized amyloplasts can sediment according to the gravity vector and are called statoliths.

Compare

*Plastid
**Chloroplast and etioplast
**Chromoplast
**Leucoplast

***Amyloplast
****Statolith
***Elaioplast
***Proteinoplast


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  • amyloplast — noun Date: 1886 a colorless plastid that forms and stores starch …   New Collegiate Dictionary

  • Amyloplast — Amyloplasten in einer Kartoffelzelle Amyloplasten (von altgriechisch ἄμυλον ámylon „Kraftmehl“, „Stärke“ und altgriechisch πλαστός plastós „geformt“) sind Organellen, die in manchen Pflanzenzellen vorkommen. Sie sin …   Deutsch Wikipedia

  • amyloplast — A plant plastid involved in the synthesis and storage of starch. Found in many cell types, but particularly storage tissues. Characteristically has starch grains in the plastid stroma …   Dictionary of molecular biology

  • amyloplast — /am euh loh plast /, n. Bot. a starch forming granule in plants; leucoplast. [1885 90; AMYLO + PLAST] * * * …   Universalium

  • amyloplast — noun A specialized leucoplast responsible for the storage of amylopectin through the polymerization of glucose …   Wiktionary

  • amyloplast — A granule in the protoplasm of a plant cell that is the center of a starch forming process. SYN: amylogenic body. [amylo + G. plastos, formed] * * * am·y·lo·plast am ə lō .plast n a colorless starch forming plastid …   Medical dictionary

  • amyloplast — n. starch producing granule in plants …   English contemporary dictionary

  • amyloplast — am·y·lo·plast …   English syllables

  • amyloplast — …   Useful english dictionary

  • Plastid — Plastids are major organelles found in plants and algae. Plastids often contain pigments used in photosynthesis, and the types of pigments present can change or determine the cell s color. Plastids are also the site of manufacture and storage of… …   Wikipedia

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