Chromoplast
Chromoplast
Chromoplasts (/ˈkroʊməˌplæsts/; from the Greek chrōma meaning color and plastós meaning formed) are a type of plastid responsible for pigment synthesis and storage in specific photosynthetic eukaryotic organisms. They are derived from proplastids and can differentiate into other forms of plastids.
Etymology
The term "chromoplast" is derived from the Greek words chrōma meaning "color" and plastós meaning "formed". This refers to the role of chromoplasts in giving color to the cells in which they are found.
Function
Chromoplasts synthesize and store pigments such as orange carotene, yellow xanthophylls, and various other types of pigments that give color to plant tissues. They are most commonly found in fruits, flowers, and aging leaves, and are responsible for their distinctive colors. This is different from chloroplasts, which are involved in photosynthesis and give plants their green color.
Structure
Chromoplasts, like all plastids, have a double membrane and contain their own DNA and ribosomes. They are generally larger than chloroplasts and have a variable internal structure. It is believed that they may differentiate from chloroplasts or other plastids, through the process of plastid differentiation.
Related Terms
External links
- Medical encyclopedia article on Chromoplast
- Wikipedia's article - Chromoplast
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