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The document discusses the structure and function of plant tissues, including the epidermis, meristematic tissues, and permanent tissues. It explains the roles of apical and lateral meristems in plant growth, as well as the types of permanent tissues, such as simple and complex tissues like phloem and xylem. Additionally, it details the specific cell types involved in nutrient transport and structural support within plants.

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JohnLoyd Pogi
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52 views2 pages

Genbio Reviewer

The document discusses the structure and function of plant tissues, including the epidermis, meristematic tissues, and permanent tissues. It explains the roles of apical and lateral meristems in plant growth, as well as the types of permanent tissues, such as simple and complex tissues like phloem and xylem. Additionally, it details the specific cell types involved in nutrient transport and structural support within plants.

Uploaded by

JohnLoyd Pogi
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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Epidermis

4-14 ●It covers the whole body of nonwoody


and young woody plants and is protected
by a waxy cuticle.
Plant Tissues
○The cuticle prevents loss of water and
Meristematic tissues
invasion of disease-causing
-are found in the growing areas of plants.
microorganisms.

Apical Meristem

* responsible for the primary growth of


blants.
*The Blue terminal bud represents
location of the apical meristem.

Apical meristems located at the root tips


(right) are responsible for the primary
growth of plants. The microscopic view of
cells (left)
shows the apical meristems of Allium
cena.

Lateral Meristem
-Responsible for secondary growth

Types of Lateral Meristem

Vascular cambium
-gives rise to secondary xylem and
phloem. Secondary xylem gives rise to
wood.

Cork cambium
-gives rise to cork cells which replaces
epidermis of plants once they mature.
Cork cambium, cork.

Permanent tissues

-are composed of nondividing cells.

Simple permanent tissues


- are composed of one kind of cell.

Complex permanent tissues


-are composed of two or more kinds of
cells.
21-29 Complex Permanent (phloem)
a.​ Phloem​
Simple Permanent (ground) -is composed of sieve-tube elements
a.​ Parenchyma cells​ that help in the transport of nutrients
- are mostly responsible for the throughout the plant’s body.
synthesis and storage of plant food.
b.​ Collenchyma cells​
- provides a furnishing flexible
support to immature parts of plants
c.​ Sclerenchyma cells​
- has two kinds,( sclereids & fibers)​
- sclereids, strengthen seed coats
and are responsible for
gritty-textured flesh of some fruits,
while fibers are used commercially
as components of making rope and
flax fibers.
Complex Permanent (xylem)
a.​ Vascular Tissues ​
- are the only complex permanent
tissues in plants​
2 types​
- xylem (water transport)​
-phloem (transport of
photosynthates)
b.​ Tracheids​
- are thin and elongated cells where
water passes through
c.​ Vessel Elements​
-They have perforated plates that
allow the transport of water through
the vessels.

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