Page 21 - EM BIOLOGY NOTES 10TH CLASS PSR DIGITAL BOOKS

 C.B. Van Neils equation in 1931 is .....

Light
CO  2 H O   CH O  H O O

2 2 Chlorophyll 2 2 2
Light
6CO  12H O  C H O  6H O  6O
2 2 Chlorophyll 6 12 6 2 2
 Factors/Essential materials for photosynthesis are :
1. CO [from air, through stomata]
2
2. H O [through roots from soil]
2
3. Light [from Sun]
4. Chlorophyll [present in the leaves of plant]
 End products of Photosynthesis are :
1. Glucose [C H O ]
6 12 6
2. Oxygen [O ]
2
3. Water [H O ]
2
 Photosynthesis occurs in chloroplasts of the leaves of the plant.
 Plants  leaves (green parts)  Mesophyll  Chloroplast
(plant cell)
T.S. OF LEAF (TRANSVERSE SECTION OF LEAF)

Structure of Chloroplast :
1. In 1883, Julius Von Sachs discovered the chloroplast in leaf cell.
2. Chloroplasts are present in mesophyll of leaves and other greeny parts of the plant.
3. About 40-100 chloroplasts are present in a plant cell.
4. Typical chloroplasts are in disc shaped.
5. They are green in colour due to the presense of chlorophyll.
6. They are covered by a double layered membrane.
7. They are filled with colourless fluid called stroma.
8. Stalks of thylakoid membranes are located in stroma are called Grana (or) Grana
thylakoids.
9. Grana thylakoids are connected by Stroma thylokoids.
10.Chlorophyll and other accessory pigments are located in the lipid part of the thylakoid
membrane and they are organized to form the reaction centres called P.S.I and P.S.II
(OR) light harvesting complex.

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