Plastid

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Plastid

Plastid (/ˈplæstɪd/; from Greek πλαστός, plastos, meaning "molded") is a major double-membrane organelle found, among others, in the cells of plants and algae. Plastids are the site of manufacture and storage of important chemical compounds used by the cell.

Etymology

The term "plastid" was coined by Ernst Haeckel in 1866, but A. F. W. Schimper was the first to provide a clear definition in 1883.

Types of Plastids

Plastids may develop into several forms, depending on which function they play in the cell. The major types are:

  • Chloroplasts: These are responsible for photosynthesis, the process by which light energy is converted into chemical energy.
  • Chromoplasts: These are responsible for pigment synthesis and storage.
  • Leucoplasts: These are non-pigmented and have functions varying from storage (amyloplasts) to the synthesis of various molecules.

Function

Plastids are involved in a variety of functions, including photosynthesis, storage of products like starch and fatty acids, and the synthesis of many types of molecules. They are critical for many plant functions and aspects of plant development.

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