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...

    Buttress roots
    Roots

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

    Human gastrointestinal tract
    Human Biology – Food and Digestion

    This tutorial recognizes the importance of food as a source of energy that will fuel many biological processes. A good d..

    human brain structure
    The Conscious & Unconscious Nervous System

    This tutorial elaborates on how the nervous system works, particularly at the tissue level of the brain. There are three..

    Population Growth and Survivorship
    Population Growth and Survivorship

    This lesson looks at population attributes, regulation, and growth. It also covers population genetics, particularly gen..

    3D rendering of an antibody
    Passive and Active Types of Immunity

    Lymphocytes are a type of white blood cell capable of producing a specific immune response to unique antigens. In thi..

    squirrel
    Animal Water Regulation

    Animals adapt to their environment in aspects of anatomy, physiology, and behavior. This tutorial will help you understa..