In 1986, Devlin proved that the process of photosynthesis takes place in the chloroplast. For this he called chloroplast as Photosynthetic apparatus. Photosynthesis occurs in the mesophyll tissue of plant leaves. Photoneutral reactions occur in the stroma of chloroplasts and photoreactions occur in quantosomes. A quantosome contains 250 chlorophylls, enzymes, electrons and pigments. Photosynthesis takes place in the green leaves of higher plants, flower petals and peduncles, green skin of flowers and fruits. Bacteria, cyanobacteria, red and brown algae carry out photosynthesis (chemosynthesis) with chromatophores. Photosynthesis occurs in the leaves and young stems of higher plants. Algae and bryophytes have chloroplasts throughout their bodies and carry out photosynthesis. Green leaves have the most chloroplasts. So green leaves are the main part of photosynthesis
is identified as Aquatic plants have a high rate of photosynthesis due to the high amount of dissolved CO2 in the water. Unicellular organisms like Euglena, Crysamoeba etc. carry out photosynthesis due to the presence of chlorophyll. The amount of CO2 in the atmosphere is 0.03% and that of water is 0.3%. Although Mucor, Yeast, Agaricus etc. are plants, they cannot carry out photosynthesis due to lack of pigments.
[ Organelles of Photosynthesis-Green Leaves, Organelles of Photosynthesis-Chloroplasts and Organelles of Photosynthesis-Thylakoids]