Etioplast

Etioplast
Übergeordnet
Plastid
Untergeordnet
Etioplastenhülle
Etioplasten-Stroma
Prothylakoid
Prolamellarkörper
Gene Ontology
AmiGO QuickGO

Etioplasten (von fr. étiolé „erbleichen“ und altgriechisch πλαστός plastós „geformt“) sind in der Biologie Zellorganellen. Diese Plastiden sind Chloroplasten, die nicht dem Licht ausgesetzt wurden und bei denen sich auf Grund des fehlenden Lichtes die innere Membranstruktur verändert und das Chlorophyll zurück- oder noch gar nicht gebildet hat. Durch Bestrahlung mit Licht entwickeln sie sich zu Chloroplasten. Es werden dann auch die Thylakoide ausgebildet, in deren Membranen die für die Photosynthese notwendigen Chlorophylle sitzen.


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  • Etioplast — Etioplasts are chloroplasts that have not been exposed to light. They are usually found in plants grown in the dark. If a plant is kept out of light for several days, its normal chloroplasts will actually convert into etioplasts. Etioplasts lack… …   Wikipedia

  • etioplast — Form of plastid present in plants grown in the dark. Lacks chlorophyll, but contains chlorophyll precursors and can develop into a functional chloroplast in the light …   Dictionary of molecular biology

  • etioplast — noun A chloroplast that has never been exposed to light …   Wiktionary

  • 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

  • Leucoplast — Leucoplasts are a category of plastid and as such are organelles found in plant cells. They are non pigmented, in contrast to other plastids such as the chloroplast.Lacking pigments, leucoplasts are not green, so they are predictably located in… …   Wikipedia

  • Thylakoid — A Thylakoid is a membrane bound compartment inside chloroplasts and cyanobacteria. They are the site of the light dependent reactions of photosynthesis. The word thylakoid is derived from the Greek thylakos , meaning sac . Thylakoids consists of… …   Wikipedia

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  • 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… …   Wikipedia

  • Chromoplast — Chromoplasts are plastids responsible for pigment synthesis and storage. They, like all other plastids (including chloroplasts and leucoplasts), are organelles found in specific photosynthetic eukaryotic species. Chromoplasts in the traditional… …   Wikipedia

  • Elaioplast — The differentiation of Elaioplasts Elaioplasts are a type of leucoplast that is specialized for the storage of lipids in plants. Elaioplasts house oil body deposits as rounded plastoglobuli, which are essentially fat droplets. Being a variety of… …   Wikipedia

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