Growth and Development in Plants. Here is the explanation about it.

1. GROWTH AND
DEVELOPMENT
I N P L A N T S
Topic 1

2. Learning Objectives
Students able to explain the definition of growth and
development process in plants
Students able to describe two types of germination
Students able to read and explain the growth curve
Students able to describe the factors affecting growth
Students ableto mention 6 hormones of growth and
development
1.
2.
3.
4.
5.

3. All plant cells are the descendent of the zygote

4. Growth is an irreversible
increase in
the number and size of a
cell, organ or whole
organism
Growth

5. Types of
Growth
Primary
Growth
Secondary
Growth

6. Germination
Epigeal Hypogeal
Cotyledones
grow to up
Cotyledones
grow keep in soil

7. Growth Curve
The Lag Phase
01. 02.
03. 04.
The Logarithmic
Phase
The Stationary
Phase
The Linear
Phase

8. WARDIERE INC.
Factors Affecting Growth
and Development in Plants
Temperature
Light
Humidity
Nutrition
Gene
Hormone

9. Temperature
1.
Plants will grow well
and may come into
flower/fruit
at 22 - 37 degree
Celcius

10. 2. Light
Photoperiodism
Kinds Of Flowers
Long-Day Plants
Short-Day Plants
Day-Neutral Plants
1.
2.
3.


11. 3. Humidity
Humidity is a condition when
the air is saturated to vapour.
Vapour content in the higher air
will make the plant take out
water in the form of water
drops on the tip of leaf
(guttation)

12. 4. Nutrition
WARDIERE INC.
Nutrition are nutrient substances; chemicals which are
necessary for plants. If the plants live in the place
containing more nutrient substances, they can use those
substances for the growth of the entire organs rapidly

13. 5. Gene
Gene is inherittable. The plants
with an excellent gene will
produce a good descendant.
Gene will also control the
metabolism in the cells of
plants.

14. 6. Hormone
Auxin
Gibberellin
Cytokinin
Ethylene
Traumatic acid
Abscisic Acid
There are 6 hormones in Plants:
1.
2.
3.
4.
5.
6.

15. A. Auxin
Rhizocaline (controls the growth of roots)
Caulocaline (spurs on the growth of stem)
Phyllocaline (spurs on the growth of leaves)
Anthocaline (spurs on the formation of flowers)
Loc: embryo of seeds, apical shoot meristem, and young leaves.
Function: increasing the cell elongation and controls the
physiology process to spur on making fruits without pollination.
Types :

16. B. Gibberellin
Stimulate the formation of seedless
Make the plants grow massively
Make the plants bloom in time (not seasonal)
Stimulate the formation of cambium in dicotyledonous
plants
Break the dormancy of fruits and seeds
Loc: apical shoot meristem, roots, young leaves and embryo
Function:

17. C. Cytokinin
Spur on the cell cleavage
Accelerate the enlargement of leaves
Accelerate the growth of roots
Stimulate on the lateral shooting on the tip of stem
Delay the falling of leaves, flower and fruits
Loc: Stem, roots
Function:

18. D. Ethylene
Accelerate the maturity of fruits (apples, bananas)
Cause the thickening of stem
Spur on flowering
Loc: In the tissues of ripe fruits, stems, leaves and flowers
Function:

19. E. Traumatic Acid
timulates cell division near a trauma site to form a
protective callus
Heal the damaged tissue.
It may also act as a growth hormone, especially in inferior
plants (e.g. algae).
Loc: Cell wall of plants
Function:

20. E. Abscisic Acid
Impede the growth in plants
Help plants solve and adhere to the
beneficial condition of environtment
(dormancy period)
Loc: In leaves, stems, roots and green fruits
Function:

21. THANK YOU