Greeness of leaves

2. Greeness of Leaves
Submitted to Submitted by
Dr. Padmapriya.P.V Sarannya.K.M
Asst. Professor Roll No. 111
NSSTC, Pandalam Natural Science

3. Leaves are the kitchen of the biosphere
Food is prepared in chloroplast using sunlight
Chloroplasts are seen in the cells of leaves

4. A Pigment called chlorophyll present in the
chloroplast helps to absorb sunlight.
There are different types of chlorophyll such as
chlorophyll a and chlorophyll b.
Chlorophyll a is bluish green in colour

5. Chlorophyll b is yellowish green in colour
Xanthophyll and carotenes are other pigments also
which give colour to leaves
Xanthophyll is yellow in colour and carotenes
yellowish orange in colour.

6. All these pigments have the ability to absorb sunlight.
Chlorophyll a alone can take part directly in
photosynthesis
The other pigments are called accessory pigments

7. The accessory pigments absorb sunlight & transfer
their energy to chlorophyll a
Chlorophyll a and chlorophyll b absorb mainly the
blue and red rays of visible light.
The green light is not absorbed at all, it is reflected
making the leaves appears green.

8. THANK YOU