AUTOTROPHIC NUTRITION

PHOTOSYNTHESIS

AUTOTROPHS

Auto= SELF Troph= NOURISH

Autotrophs

are

PLANTS

AUTOTROPHS:

•Organisms that can

make their own food

•Also called PRODUCERS

•Examples:

flowers, plants,

trees, fruits,

vegetables

HETEROTROPHS:

•Hetero = OTHER

•Organisms that cannot make

their own food, they need to

consume it

•Also called CONSUMERS

Examples: animals,

fungus, some bacteria

Types of AUTOTROPHIC NUTRITION

•PHOTOSYNTHESIS: light energy

from the sun is changed into

chemical energy in the form of

glucose in plants

CHEMOSYNTHESIS: process by

which some organisms, like certain

bacteria, use chemical energy to

produce carbohydrates

formula for PHOTOSYNTHESIS

PHOTOSYNTHESIS

CHEMICAL FORMULA FOR

PHOTOSYNTHESIS

Sunlight +

CO2 + H20

Ingredients

Raw Materials

Reactants

End Products

C6H12O6 + O2

ENERGY + Carbon

Dioxide +Water

Glucose +

Oxygen

Summary of Photosynthesis:

Light energy is absorbed by

the CHLOROPLAST

and is used to make oxygen

and (C6H12O6) GLUCOSE

from the raw materials of CO2

and H2O

GLUCOSE

provides all of

our cells with

energy

C6H12O6

PROCESS OF

PHOTOSYNTHESIS

1.Sunlight is made up of many

different colors of light.

2.These colors make up the visible

light of the ELECTROMAGNETIC

SPECTRUM

PROCESS

1.There are

7 colors in

the spectrum

ROY G BIV

REDORAN

GEYELLO

WGREEN

BLUEINDIG

OVIOLET

PROCESS

1.RED and BLUE wavelengths

are the most effective colors of

light for photosynthesis 1.CHLOROPHYLL is a green

pigment in plants that

absorbs the light that is

needed for photosynthesis.

WHERE DOES IT OCCUR?

•in the LEAF of the plant, there are

organelles called

CHLOROPLASTS

FIRST REACTION

•Takes place in the GRANA or

THYLAKOIDS

•These reactions are called LIGHT

DEPENDENT or

PHOTOCHEMICAL

Two sets of reactions take place in two parts of

the chloroplast

FIRST REACTION

•In this part of the chloroplast, light

splits water (H2O) into

HYDROGEN And OXYGEN

•The HYDROGEN stays inside

the chloroplast but the OXYGEN

leaves the plant and this is the

oxygen that we breathe in

SECOND REACTION

•The second reaction takes place in

the STROMA (LIQUID part of the

chloroplast)

•This is where the CALVIN CYCLE

takes place. It is also known as

LIGHT INDEPENDENT, or DARK

REACTION.

SECOND REACTION

•Here CARBON DIOXIDE

combines with HYDROGEN from

the light reactions to make

GLUCOSE

•The glucose is stored in the

plant for use as energy for life

processes.

LEAF