BYHARITHA KRISHNAN .R.V

NATURALSCIENCEK.U.C.T.E KULAKKADA

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.

PLANTS

PHOTOSYNTHESIS THE WORD COMES FROM TWO GREEK WORDS ;

photon = LIGHT

AND

synthesis = PUTTING TOGETHER

DEFINITION

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

REQUIREMENTS

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

CHEMICAL EQUATION

6CO2 + 6H2O =light energy=> C6H12O6 + 6O2

PHOTOSYNTHETIC PIGMENTS

1) CHLOROPHYLLS

2) CAROTENOIDS

3) PHYCOBILINS

4) RHODOPSIN

PHOTOSYNTHESIS

PHASES OF PHOTOSYNTHESIS

1. LIGHT REACTION

2. DARK REACTION

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.

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 .

THANKYOU