Dictionary > Meristem

Meristem

Definition
noun, plural: meristems
(”botany’) An undifferentiated plant tissue that can give rise to different tissues and organs as the plant grows
Supplement
A meristem is comprised of indeterminate, actively dividing cells that give rise to differentiated tissues such as epidermis, trichomes, phellem, and vascular tissues. The meristem (also called meristematic tissue) is responsible for the growth of plants.
There are many ways to classify meristematic tissues. Based on the type of growth they are associated with, they may be primary or secondary. Another way of classifying them is according to their location in the plant: (1) apical meristem (terminal portions), (2) intercalary meristem (at the nodes of certain monocots), and (3) lateral meristem (toward or from the sides).
The cells of meristematic tissue are usually small and thin-walled (with primary cell wall only). They are compact, leaving no intercellular spaces in between. They are a parenchymatous-type of cell. They have a large nucleus and extremely small vacuoles (when present). The type of plastid present is a proplastid. The genes responsible for keeping the cells at an undifferentiated state belong to a family of genes controlling plant morphologenesis, the knotted1-like homeobox (KNOX) genes.
Also called:

  • meristematic tissue
  • embryonic tissue
  • growth tissue

See also:

  • cambium
  • Related term(s):

    Related form(s):

  • meristematic (adjective, of, pertaining to, relating to, or characterized by a meristem)


    You will also like...

    Cell Respiration
    Cell Respiration

    Cell respiration is the process of creating ATP. It is "respiration" because it utilizes oxygen. Know the different stag..

    Pink Lotus plant on a pond
    Freshwater Lentic Communities & Animals

    This tutorial looks at some of the communities in freshwater lentic habitats. For instance, symbiosis occurs in a commun..

    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..

    human respiratory system
    Respiration

    The human respiratory system is an efficient system of inspiring and expiring respiratory gases. This tutorial provides ..

    Lights' Effect on Growth
    Lights’ Effect on Growth

    This tutorial elaborates on the effect of light on plant growth. It describes how different plants require different amo..

    Balanced Diet
    A Balanced Diet – Minerals and Proteins

    Proteins and minerals can be derived from various dietary sources. They are essential for the proper growth and developm..