Plant Tissue Flashcards
What are meristematic cells?
Are thin-walled and rich in cytoplasm (with small vacuoles)
Consist of immature cells and undifferentiated cells at the shoot tips and root tips and are regions of active cell division
What is the function of apical meristem?
For the increase in length of the plant body
Example sentence: Apical meristem is responsible for the growth of the plant upwards.
Where is lateral meristem/vascular cambium found?
Found embedded as a single layer in the vascular core of stem and roots; for the increase in girth of the plant body
Example sentence: Lateral meristem plays a role in the thickening of plant stems.
Where is intercalary meristem found?
Found in the nodes of grasses or monocots
Example sentence: Intercalary meristem helps in the growth of grasses at the nodes.
What is meristematic tissue?
Cells are small, spherical or polygonal in shape. This allows for close packing of a large number of cells. Vacuoles are very small or completely absent. Vacuoles provide rigidity to cells thus preventing rapid division. The lack of organelles is a feature of an undifferentiated cell. Large amount of cytoplasm and cell. Large amount of nuclear material contains the DNA necessary for division and differentiation.
Meristematic tissues - localized regions of cell division
What are Apical Meristems responsible for?
Primary or Transitional Meristem Primary growth. Protoderm gives rise to epidermis. Ground meristem gives rise to ground tissue. Procambium gives rise to 1° vascular tissue.
Apical Meristems
What do Lateral Meristems include?
Vascular cambium 2° vascular tissue. Cork cambium or phellogen periderm.
Lateral Meristems
Where are Intercalary Meristems found?
Found in the nodes of grasses.
Intercalary Meristems
