Abstract
Publisher Summary The chloroplasts are said to consist of an aqueous and a lipid phase, and both phases are said to be interspersed homogeneously under the microscope. The chloroplast is, thus, homogeneous in the natural state while a grana structure was said to be a form of precipitation caused by an injury. The chloroplasts are situated in the protoplasm and possess a shape typical of the genus. The chloroplasts of algae are the largest; not infrequently their size reaches 100 p. Usually, plate-type pigment carriers are found, which are either lobed like amoebas (Mougeotia) or ribbon-shaped (Spirogyra) groups. This chapter discusses the microscopic structure of chloroplasts, including algae and the chloroplasts of higher plants. Algal chloroplasts are homogeneous. But a grana structure is described for some species of algae. The structure of chloroplasts in algal flagellatae, Euglena gracilis bacillaris and Poteriochromonas stipitata, is investigated in the electron microscope (EM).
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