plastid

(noun)

any of various organelles found in the cells of plants and algae, often concerned with photosynthesis

Related Terms

  • conjugation
  • chloroplast
  • thylakoid
  • osmoregulation

Examples of plastid in the following topics:

  • The Evolution of Plastids

    • There are three type of plastids: chloroplasts, chromoplasts, and leucoplasts.
    • Chloroplasts are plastids that conduct photosynthesis.
    • Chromoplasts are plastids that synthesize and store pigments.
    • Plastids, like mitochondria, cannot live independently outside the host.
    • In addition, like mitochondria, plastids derive from the binary fission of other plastids.
  • Chromalveolata: Alveolates

    • However, some chromalveolates appear to have lost red alga-derived plastid organelles or lack plastid genes altogether.
    • This phenomenon is called a red tide and results from the abundant red pigments present in dinoflagellate plastids.
  • Characteristics of Eukaryotic Cells

    • In addition, plant cells have a cell wall, a large central vacuole, chloroplasts, and other specialized plastids, whereas animal cells do not.
    • Plant cells have a cell wall, chloroplasts, plasmodesmata, and plastids used for storage, and a large central vacuole, whereas animal cells do not.
  • Endosymbiosis and the Evolution of Eukaryotes

    • More detailed electron microscopic comparisons between cyanobacteria and chloroplasts combined with the discovery that plastids (organelles associated with photosynthesis) and mitochondria contain their own DNA led to a resurrection of the idea in the 1960s.
  • Plant Responses to Gravity

    • Amyloplasts (also known as statoliths) are specialized plastids that contain starch granules and settle downward in response to gravity.
  • Comparing Plant and Animal Cells

    • Plant cells have a cell wall, chloroplasts and other specialized plastids, and a large central vacuole, whereas animal cells do not.
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