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...

    Still Water Community Plants
    Still Water Community Plants

    This tutorial looks at the adaptations of freshwater plants for them to thrive in still water habitats. Familiarize your..

    Origins of Life on Earth
    Origins of Life on Earth

    Earth was created around 4.5 billion years ago and life began not long after. Primitive life likely possessed the elemen..

    An artist's depiction of the origin of amphibians
    Amphibians & Early Reptiles

    Obtaining air outside an aquatic environment required species to acquire suitable adaptations, and this was the case of ..

    Thermographic image of face and neck
    Regulation of Organic Metabolism, Growth and Energy Balance

    The human body is capable of regulating growth and energy balance through various feedback mechanisms. Get to know the e..

    Biosecurity and Biocontrol
    Biosecurity and Biocontrol

    This lesson explores the impact of biosecurity threats, and why they need to be identified and managed. Examples to incl..

    Genetics and Evolution
    Genetics and Evolution

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

    Related Articles...

    No related articles found

    See all Related Topics