Blackmann’s law of limiting factor states that :
If a chemical process is affected by more than one, then the rate is determined by the factor which is nearest to its minimal value. The minimum or limiting factor is the factor which directly affects the process if its quantity id changed. “
What is Kranz anatomy?
Kranz anatomy is the special arrangement of the cells found in the C4 plants.
The characteristics of Kranz anatomy are:
The bundle sheath cells form several layers around the vascular bundles. The chloroplasts of bundle sheath cells are large and more in number, they have thick walls and no intercellular spaces. Mesophyll cells are undifferentiated and arranged in concentric layers around the vascular bundles.
Chlorophyll ‘a’ |
Chlorophyll ’b’ |
1. Molecular formula is C55 H72 O5 N4 Mg. |
Molecular formula is C55 H70 O6 N4 Mg. |
2. It is bluish green in colour. |
It is olive green in colour. |
3. It is universal and found in lower and higher plants except bacteria. |
3. It is found only in higher plants. |
4. It has methyl group attached to the third carbon of porphyrin head. |
4. It has –CHO group attached to the third carbon atom of porphyrin head. |