Dictionary > Bast fiber

Bast fiber

Definition
noun
(botany) The durable, nonliving sclerenchyma fiber in the phloem, providing support to the plant
Supplement
The phloem sclerenchyma is one of the major components of the phloem in vascular plants. The others are sieve elements, companion cells, and phloem parenchyma. The phloem is the vascular tissue responsible for the translocation of photosynthate materials throughout the plant. The phloem sclerenchyma includes the phloem fibers and the sclereids. They are specialized sclerenchyma cells. They provide the plant mechanical support as both of them have thick, lignified cell walls. Apart from the primary cell wall, they form secondary cell wall in between the primary cell wall and the plasma membrane. The phloem fibers are able to provide tension strength without limiting flexibility (unlike sclereids).
The phloem fibers are narrow and elongated, and in some plants, are relatively longer. They are found both in the primary phloem and the secondary phloem. In the secondary phloem, though, the phloem fibers form the bast fibers. The bast fibers are the durable, nonliving sclerenchyma fiber in the secondary phloem. Some of the bast fibers are commercially important. Because of their commercial value, they are collected and marketed as:

  • jute
  • hemp
  • flax
  • ramie
  • kenaf
  • rattan

Variant(s):

  • bast fibre (British)
  • Synonym(s):

    See also:

  • phloem
  • sclerenchyma


  • You will also like...

    Electromagnetic spectrum of a brain
    Sleep and Dreams – Neurology

    While learning and intelligence are associated with the functions of a conscious mind, sleep and dreams are activities o..

    Non-Mendelian Inheritance
    Non-Mendelian Inheritance

    In this tutorial, find out more about certain types of inheritance that does not follow the Mendelian inheritance patter..

    Control of body movement
    Control of Body Movement

    Some of the body movements can be controlled at will, others cannot. The body has a motor program, which is the pattern ..

    Protein (illustration)
    Protein Variety

    The sequence of amino acids determines the type of protein. Protein is synthesized according to the sequence of nucleoti..

    Schematic diagram of bacterial lactose operon
    Gene Action – Operon Hypothesis

    Learn how the way genes control and determine every aspect of the body. This lesson uses lac operon as an example. ..

    ..

    vitamins
    A Balanced Vitamin Diet – Vitamins A – K

    A balanced diet is essential to a healthy organism. Insufficiency or too much of a particular element or compound, such ..

    Related Articles...

    No related articles found

    See all Related Topics