Photosynthesis is the process by which plants synthesize carbohydrates from carbon dioxide, water, and sunlight. It is significant as it maintains oxygen levels in the atmosphere, provides both direct and indirect food sources for humans and animals, and has created fossil fuel reserves like coal and oil. The key reaction of photosynthesis occurs in the chloroplasts of plant leaves where chlorophyll and other pigments absorb sunlight and convert it into chemical energy that is used to produce glucose and oxygen from carbon dioxide and water.
1. Photosynthesis in Higher Plants
(HS 1st Year/Chapter 13)
Tridip Boruah
(M.Phil/NET/GATE/SLET)
Assistant Professor
Department of Botany
M.C College, Barpeta
4. Definition
Photosynthesis (Photon = Light, Synthesis = Putting
together) is an anabolic, endergonic process by
which green plant synthesize carbohydrates
(initially glucose) requiring carbon dioxide, water,
pigments and sunlight.
5. Significance of Photosynthesis
It maintains equilibrium of O2 in the atmosphere
It provides food either directly as vegetables, or
indirectly as meat or milk of animals which in turn
are fed on plants
Photosynthesis has also provided vast reserves of
energy to man as fuel such as coal, oil, peat and
also wood and dung.
