Dictionary > Chromoplast

Chromoplast

Definition
noun, plural: chromoplasts
Any of the coloured plastids associated with pigment synthesis and storage
Supplement
Plastids are organelles involved in the synthesis and storage of food. They are found within the cells of photosynthetic eukaryotes. In plants, plastids may develop into these forms: (1) chloroplasts, (2) chromoplasts, (3) gerontoplasts, and (4) leucoplasts. Certain plastids have the ability to differentiate from one form to another. An example of it is the chloroplasts re-differentiating into chromoplasts during the ripening of a fruit.
Chromoplasts are plastids that are coloured due to the pigments that are produced and stored inside them. They are found in fruits, flowers, roots, and senescent leaves. The colour of these plant organs is associated with the presence of pigments, apart from chlorophyll.
Chromoplasts vary in structural appearance under an electron microscope. They may generally be grouped into five types: (1) globular, (2) crystalline, (3) fibrillar, (4) tubular, and (5) membranous.1 Nevertheless, some chromoplasts may be harder to classify when their structure is rather complicated, such as those of tomatoes that appear both membranous and crystalline in appearance.
Chloroplasts are sometimes regarded as a subgroup of chromoplasts just so to differentiate them from the colourless plastids, the leucoplasts. However, chloroplasts are made distinct from chromoplasts because they are associated mainly in photosynthesis and not in producing and storing pigments.
Synonym(s):

  • chromoplastid
  • chromoleucite

See also:

  • plastid
  • chloroplast
  • leucoplast
  • accessory pigment
  • photosynthesis
  • Reference(s):

    1 Camara, B., Hugueney, P., Bouvier, F., Kuntz, M., & Monéger, R. (1995). “Biochemistry and molecular biology of chromoplast development”. Int. Rev. Cytol. 163: 175–247.


    You will also like...

    Psychiatry and mental disorders
    Psychiatry & Mental Disorders

    Different mental disorders are described here. Read this tutorial to get an overview of schizophrenia, affective mood di..

    Plant Auxins
    Plant Auxins – Phototropism & Geotropism

    Plants produce hormones to regulate their growth. Auxins, for instance, influence plant growth. Know the role of auxin i..

    Neurology of Illusions
    Neurology of Illusions

    Illusions are the perceptions and sensory data obtained from situations in which human error prevents us from seeing the..

    Ploidy
    Polyploidy

    Humans are diploid creatures. This means that for every chromosome in the body, there is another one to match it. Howeve..

    Buttress roots
    Roots

    This study guide tackles plant roots in greater detail. It delves into the development of plant roots, the root structur..

    Birth Control and Contraception
    Birth Control and Contraception

    Different pregnancy and birth control and contraception strategies are described. Read this tutorial to learn each of th..