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THE FACTORS AFFECTING
THE RATE OFPHOTOSYNTHESIS
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THE FACTORS AFFECTING THERATE OF PHOTOSYNTHESIS
Factors
Light
intensity
Temperature
Concentration
of CO2
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1. Light intensity
Light is essential during the light reaction of
photosynthesis.
Plants shows various adaptations to obtain
the maximum amount of light.
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1. Light intensity
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1. Light intensity
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1. Light intensity
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1. Light intensity
Rate
ofphotosynt
hesis
Light intensity
Graph II
Graph IP Q
0.13% CO2 at 30C
0.03% CO2 at 30C
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2. Concentration of CO2
Carbon dioxide is required in dark reaction as
the raw materials used in the synthesis of
glucose.
The concentration of carbon dioxide in the
atmosphere varies between 0.03% to 0.04%.
In places where the density of plants is high,
competition of CO2 arises and will affect the
rate of photosynthesis.
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2. Concentration of CO2
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2. Concentration of CO2
Rate
ofphotosynthesis
CO2 concentration
30C at high light intensity
30C at low light intensity
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3. Temperature
The dark reaction of photosynthesis is
catalyzed by enzymes.
Changes in temperature will affect the rate of
photosynthesis.
An increase of 10C in the surrounding will
double the rate of photosynthesis.
When the temperature is too high, the
photosynthetic enzymes will destroy.
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3. Temperature
Q: What happens to photosynthesis
process?????
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3. Temperature
Rate
ofphotosynthesis
Temperature
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The difference in the rate of
photosynthesis in plants
throughout the day
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Q1: Does the rate of photosynthesis in plants
constant throughout the day????
Q2: What factors that contribute to this
differences?????
Q3: What happens to rate of photosynthesis
during morning, midday, evening and night???
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Increasing the productivity of
crops based on the factorsaffecting the rate of
photosynthesis
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Q1: What happens in countries with 4
seasons????
Q2: How to overcome this problem?????
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Greenhouse
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A caring attitude towards plants
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Importance of photosynthesis
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Technology used in foodproduction
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Methods used to improve the quality and
quantity of food production
Direct seedling
Hydroponics
Aeroponics
Breeding of plants and animals
Tissue culture
Genetic engineering
Soil management
Biological control
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Technological development infood processing
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Food processing
The necessity of food processing.
Food processing methods:
Cooking
Treating food with salt, sugar and vinegar
Fermentation
Drying
Pasteurisation
Canning
Refrigeration