Plant Tissues

1. PLANT TISSUES
NITHYA J
NATURAL SCIENCE
MILLATH COLLEGE OF TEACHER EDUCATION

2. DEFINITION
A Plant tissue can be defined as a cell or group of cells
dividing to give rise to large number of cells, which is
collectively referred as tissues. They are structurally and
functionally similar to the cells
PLANT TISSUES

3. PARENCHYMA
The cells of parenchyma are large, thin walled and usually
have large central vacuole.
They are often partially separated from each other and are
usually stuffed with plastids.
Food storage and photosynthesis are the main function
TYPES OF TISSUES

4.  Collenchyma are specialized parenchyma tissue, which
are found in all green plants.
 Collenchyma cells have thick walls that are specially thick
at their corners.
 These cells provide mechanical support for the plants.
COLLENCHYMA

5.  The wall of these cells are very thick and built up in a
uniform layer around the entire margin of the cell.
 Thickness of the cell is due to lignin deposition
 Sclerenchyma cells provide mechanical support.
SCLERENCHYMA

6. XYLEM
 Xylem conduct water and dissolved minerals from the
root to all other parts of the plant.
 Xylem contains tracheids, vessels, xylem fibers and
xylem parenchyma.
 They also give mechanical support
CONDUCTIVE TISSUES

7.  They are live cells, which lack nucleus and other
organelles.
 They transport dissolved organic food materials from the
leaves to all other parts of the plant.
PHLOEM