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...

    Oligodendrocyte and Schwann cell
    The Central Nervous System

    Myelin sheath is essential for a faster conductivity of signals. Know more about this feature of some neurons in the Cen..

    dinosaurs
    The Dinosaurs

    Dinosaurs represented a major turn in the evolutionary development of organisms on Earth. The first dinosaurs were presu..

    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..

    Pikas are an indicator species for climate change
    Indicator Species and Endangered Species

    Certain species are capable of expressing characteristics indicative of the state of the ecosystem they occupy. They are..

    A chart depicting Mendel's Law of Dominance
    Mendel’s Law & Mendelian Genetics

    One of Mendel’s law of inheritance is the “law of dominance”. Read this tutorial to know more about this form of i..

    Kidneys
    Kidneys and Regulation of Water and Inorganic Ions

    The kidneys are responsible for the regulation of water and inorganic ions. Read this tutorial to learn about the differ..