ppt

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