Why Chlorophyll-A is called essential pigment ?
Dear student,
Chlorophyll A is the primary pigment of photosynthesis which absorbs light of the violet, blue and red wavelengths. It is the principal electron donor in the electron transport chain initiated during light absorption. Inside both P680 and P700 reaction centres, the chlorophyll A is present and it gives two electrons to the transport chain. These electrons are released via redox reactions. Chlorophyll A along with accessory pigments help in covering the large range of wavelengths, however, chlorophyll A is the donor of electrons and thus, is considered to be the essential pigment.
Regards!
Chlorophyll A is the primary pigment of photosynthesis which absorbs light of the violet, blue and red wavelengths. It is the principal electron donor in the electron transport chain initiated during light absorption. Inside both P680 and P700 reaction centres, the chlorophyll A is present and it gives two electrons to the transport chain. These electrons are released via redox reactions. Chlorophyll A along with accessory pigments help in covering the large range of wavelengths, however, chlorophyll A is the donor of electrons and thus, is considered to be the essential pigment.
Regards!