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Fig. 7a, b: Histological and cytological organization of Leptoseris fragilis. a) Electron micrograph (TEM) of the oral epithelia. E: oral epidermis; G: oral gastrodermis; Z: zooxanthellae with a diameter of ca. 8 µm. P: pigment granules; GR: gastrovascular cavity. b) Pigment granules of the hosts chromatophore system covering the zooxanthellae-containing vacuole (SEM). Z: zooxanthellae; P: pigment granules; scale bar: 3 µm. |