lesson 6.10
TRANSCRIPT
Lesson 6.10Fotosintesis
Photo=lightSynthesis=produce
Disediakan oleh:NUR SUHAIDAH SUKOR
SMK SANDAKAN, SABAH
Photosynthesis is the process by which chlorophyll containing cells
synthesis carbohydrates from carbon dioxide and water
using the energy of sunlight.
Carbon dioxide (6CO2)+ water (6H2O)
Glucose (C6H12O6) + oxygen (6O2)
light
chlorophyll
Sejarah Penemuan Fotosintesis
1) Jean Baptiste Tumbuhan tumbuh daripada air dan bukannya tanah
2) Joseph PriestlyTumbuhan hijau kembalikan oksigen ke udara dan sokong respirasi
3) Jan IngenhouszKehadiran cahaya matahari dan pigmen hijau (klorofil)hasilkan oksigen
4) Jean SenebierCO2 digunakan oleh tumbuhan
5) De SaussureFotosintesis perlukan air
6) Robert Mayer Fotosintesis menukarkan tenaga solar kepada tenaga kimia
7) BlackmanLight dependent process and light-independent.
8) Robert hillKloroplas hasilkan oksigen
a) Leaf mosaic - Kurangkan pertindihan diantara satu sama lain
- Menerima cahaya secara optimumb) 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 mataharid) Vein – menyokong lamina
Leaf structure and function
Struktur dan Fungsi Daun
Notes: complete the function of each structure. Textbook pg 130. Lesson 60 content 5
Palisade parenchyma
Spongy parenchyma
Upper epidermis
Bundle sheat
PhloemStoma
Xylem
Lower epidermis
Adaptation of plants to its habitat to carry out photosynthesis
Habitat Types of plant
Stomata distribution Chloroplast Distribution
Land Plant Hibiscus, balsam
Lower epidermis > upper epidermis
High in palisade mesophyll
Water surface
Lotus leaf •Upper epidermis > lower epidermis•Stomata open most of time
High in palisade mesophyll
In the water Hydrilla sp. • no stomata• difussion of gases occurs all over plant surface
Found in all part of the plant
Dessert or arid places
cactus • sunken stomata/in pits on the stem• leaves modified into needles and thorn• reduce leaves surface to control transpiration
• many in stems• photosynthesis at the stems
a) Diffusion of CO2 and O2 in and out of leaves
b) Transport of organic product
c) contains lot of chloroplastd) Diffusion of CO2 and O2
within leafe) Prevent excessive water
lostf) Transport water
Kuiz
End SlideThank you
Quiz answer: a) stomab) Phloemc) Palisade mesophylld) Spongy mesophylle) cuticlef) xylem
Net or pinnate venation(dicots)
Parallel venation(monocots)
Dry habitat (cacti)
• Cuticle is waterproof layer on the surface of the upper epidermis.• Fx to protect the leaves