Structural Aspects of the Photosynthetic Apparatus

The leaves of water plants are not covered by cutin and contain no stomata. The epidermal cells very often contain chloroplasts as do the other cells in the leaf. Carbon dioxide enters the leaf in the dissolved state and comes into intimate contact with the chloroplast-containing cells. 

The chloroplasts are embedded in the cytoplasm of the cell and are one of a number of cytoplasmic particles that are found in plant cells. There is no general agreement as to the nature of these various cytoplasmic particles (5). The term mitochondria is commonly used to denote one of these fractions, and a great deal of work has been carried out on their physiological role particularly with respect to the localization of enzymes 

Granick, in Photosynthesis in Plants (J. Franck and W. E. Loomis, eds.), p. 113. Iowa State College Press, Ames, 1949. 

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