Green plants are essential to life on Earth as they produce their own food through the process of photosynthesis. Photosynthesis requires light energy, carbon dioxide, and water to produce carbohydrates and oxygen. It occurs in two phases - the light reaction where water is split using energy from light, and the dark reaction where carbohydrates are synthesized without light. Plants are important as they are producers, can make their own food, and support all life on the planet, so conservation of nature through planting trees is important.

1. BY
HARITHA KRISHNAN .R.V
NATURALSCIENCE
K.U.C.T.E KULAKKADA

2. GREEN PLANTS
 PLANTS ARE THE BACKBONE OF ALL LIFE ON
EARTH.
 PLANTS ARE ESSENTIAL TO BALANCE NATURE.
 PLANTS ARE THE ULTIMATE SOURCE OF ENERGY.
 HUMANS EAT FOOD BUT PLANTS MAKE THEIR
FOOD THROUGH PHOTOSYNTHESIS.

3. PLANTS

4. PHOTOSYNTHESIS
 THE WORD COMES FROM TWO GREEK WORDS ;
photon = LIGHT
AND
synthesis = PUTTING TOGETHER

5. DEFINITION
“GREEN PLANTS MANUFACTURE THEIR OWN
FOOD AND GIVE OFF OXYGEN IN THE PROCESS
CALLED PHOTOSYNTHESIS.”

6. REQUIREMENTS
GREEN PLANTS (POSSESSING
CHLOROPHYLL) NEED ONLY LIGHT ENERGY ,
CARBONDIOXIDE AND WATER TO MAKE
CARBOHYDRATE.

7. CHEMICAL EQUATION
6CO2 + 6H2O =light energy=> C6H12O6 + 6O2

8. PHOTOSYNTHETIC PIGMENTS
1) CHLOROPHYLLS
2) CAROTENOIDS
3) PHYCOBILINS
4) RHODOPSIN

9. PHOTOSYNTHESIS

10. PHASES OF PHOTOSYNTHESIS
1. LIGHT REACTION
2. DARK REACTION

11. LIGHT AND DARK REACTION
 LIGHT REACTION (PHOTOPHASE REACTION) IS
THE LIGHT DEPENDED FIRST PHASE OF
PHOTOSYNTHESIS IN WHICH HYDROLYSIS OF
WATER OCCUR.
 DARK REACTION IS THE SYNTHESIS OF
CARBOHYDRATE BY GREEN PLANTS IN A LIGHT
INSENSITIVE PHASE.

12. IMPORTANCE OF PLANTS
PLANTS ARE THE PRODUCERS OF THE
ECOSYSTEM .
ONLY GREEN PLANTS CAN MAKE FOOD .
PLANTS ARE THE BASIS OF ALL LIFE ON EARTH.
SO WE CONSERVE OUR NATURE THROUGH
PLANTING TREES .

13. THANKYOU