Photosynthesis is the process by which chlorophyll-containing cells produce carbohydrates from carbon dioxide and water using energy from sunlight. During photosynthesis, carbon dioxide and water are converted into glucose and oxygen using light energy captured by chlorophyll. The key structures and functions of leaves that facilitate photosynthesis include stomata for gas exchange, veins for transport, palisade mesophyll containing many chloroplasts for photosynthesis, and spongy mesophyll for gas diffusion. Plants have adapted traits like stomata distribution and chloroplast placement to optimize photosynthesis according to their habitat.

1. Lesson 6.10
Fotosintesis
Photo=light
Synthesis=produce
Disediakan oleh:
NUR SUHAIDAH SUKOR
SMK SANDAKAN, SABAH

2. Photosynthesis is the process by which
chlorophyll containing cells
synthesis carbohydrates
from carbon dioxide and water
using the energy of sunlight.
light
Carbon dioxide (6CO2) Glucose (C6H12O6) +
+ water (6H2O) oxygen (6O2)
chlorophyll

3. Sejarah Penemuan Fotosintesis
1) Jean Baptiste 5) De Saussure
Tumbuhan tumbuh daripada air Fotosintesis perlukan air
dan bukannya tanah
6) Robert Mayer
2) Joseph Priestly Fotosintesis menukarkan tenaga
Tumbuhan hijau kembalikan solar kepada tenaga kimia
oksigen ke udara dan sokong
respirasi 7) Blackman
Light dependent process and
3) Jan Ingenhousz light-independent.
Kehadiran cahaya matahari dan
pigmen hijau (klorofil)hasilkan 8) Robert hill
oksigen Kloroplas hasilkan oksigen
4) Jean Senebier
CO2 digunakan oleh tumbuhan

4. Leaf structure and function
a) Leaf mosaic
- Kurangkan pertindihan diantara satu sama lain
- Menerima cahaya secara optimum
b) Lamina
- Struktur nipis memudahkan resapan CO2 dan penembusan
cahaya.
- joined to stem by a petiole.
c) Petiole
– Memegang daun pada kedudukan terbaik untuk menerima
cahaya matahari
d) Vein – menyokong lamina

5. Struktur dan Fungsi Daun
Notes: complete the function of each structure. Textbook pg 130. Lesson 60 content 5

6. Bundle Upper
Xylem Palisade
sheat epidermis
parenchyma
Stoma Phloem Spongy
Lower parenchyma

7. Adaptation of plants to its habitat to carry out
photosynthesis
Habitat Types of Stomata distribution Chloroplast
plant Distribution
Land Plant Hibiscus, Lower epidermis > upper High in palisade
balsam epidermis mesophyll
Water Lotus leaf Upper epidermis > lower
•
High in palisade
surface epidermis mesophyll
Stomata open most of time
•
In the water Hydrilla sp. no stomata
•
Found in all part
difussion of gases occurs all
•
of the plant
over plant surface
Dessert or cactus •
sunken stomata/in pits on •
many in stems
arid places the stem •
photosynthesis at
•
leaves modified into needles the stems
and thorn
•
reduce leaves surface to
control transpiration

8. Kuiz
a) Diffusion of CO2 and O2 in
and out of leaves
b) Transport of organic
product
c) contains lot of chloroplast
d) Diffusion of CO2 and O2
within leaf
e) Prevent excessive water
lost
f) Transport water

9. End SlidE
ThanK you
Quiz answer:
a) stoma
b) Phloem
c) Palisade mesophyll
d) Spongy mesophyll
e) cuticle
f) xylem

11. Net or pinnate venation Parallel venation
(dicots) (monocots)

12. Dry habitat (cacti)

14. • Cuticle is waterproof layer on
the surface of the upper
epidermis.
• Fx to protect the leaves