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Plant Tissues - Meristematic Tissue

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Plant tissues

  • Plants do not move, i.e., they are stationary.

  • Most of the tissues they have are supportive, which provides them with structural strength.

  • Most of these tissues are dead, as they can provide better mechanical strength than the live ones, and need less maintenance.

  • Some of the plant tissues keep on dividing throughout the plant life. These tissues are localised in certain regions

Types of Plant Tissues:

Based on the dividing capacity of the tissues, various plant tissues can be classified as growing or meristematic tissue and permanent tissue which have further sub-divisions as explained below:

Meristematic Tissue

  • Only certain parts of a plant tend to grow. The tissues located in such parts are called meristematic tissues.
  • They have the capability to divide themselves and form new tissues. They have thin cell wall made of cellulose. Also have dense nucleus and cytoplasm but lack vacuoles.
  • They can further we classify differently based on the areas of the plants where they are located -
  1. Apical
  2. Lateral
  3. Intercalary

1.Apical Meristem:

  • They are responsible for the growth of stems and roots in the plants.
  • They are found on the tips of the roots and stems.

2.Lateral Meristem:

  • They are responsible for increasing the circumference of the middle part of the stem and hence are found there.

3.Intercalary Meristem:

  • These tissues are present at internodes or stem regions between the places at which leaves attach.
  • Vacuoles are responsible for storage of food in water. The intercalary tissues do not store them. They are rather responsible for manufacturing them.
  • Moreover, vacuoles contain sap which provides rigidity to a cell. This property of vacuoles may not allow the intercalary tissues to divide and manufacture new cells. Hence vacuoles are not present in intercalary meristem.

 

 

 

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