. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. ENDOLITHIC FUNGI IN HERMATYPIC CORALS 255 A B ssk. D Figure 1. Conical protuberances encapsulating endolithic fungi. (A) Acroponi cytlu-rca. Cone (arrow) deposited around fungal hypha lh) on skeletal surface (sk) at tip of axial septum. (B) A. cytherea. Cone, composed of layers of repair aragnmte encasing a fungal hypha on corallite wall. (C) Pocillopora eydouxi. Cluster of three cones. Note tracks of fungal hyphae (h) approaching corallum surface, at base of cones. (D) P. eydouxi. Side view of skeletal spine (see Fig. 2C) p
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. ENDOLITHIC FUNGI IN HERMATYPIC CORALS 255 A B ssk. D Figure 1. Conical protuberances encapsulating endolithic fungi. (A) Acroponi cytlu-rca. Cone (arrow) deposited around fungal hypha lh) on skeletal surface (sk) at tip of axial septum. (B) A. cytherea. Cone, composed of layers of repair aragnmte encasing a fungal hypha on corallite wall. (C) Pocillopora eydouxi. Cluster of three cones. Note tracks of fungal hyphae (h) approaching corallum surface, at base of cones. (D) P. eydouxi. Side view of skeletal spine (see Fig. 2C) penetrated by endolithic fungal hyphae (h). Hyphae interact with adjacent coral tissue and initiate external deposition of repair aragonite by the coral polyp, resulting in the formation of cones (arrows). Transmitted light photomicrographs: scale bar = 10 /im. Samples of A. cvilicrca and P. cyilouxi were collected at Johnston Atoll (16"44'N: 169"32'W) in February and June 1999, respectively. Petrographic thin sections were prepared according to the modified method of Golubic i't ul. (29). Samples were fixed in the field in either glutaraldehyde ( M cacodylate buffer. pH ). or formaldehyde, dehydrated in a graded acetone series, embedded in SPURRS low-viscosity resin (Poly- sciences. Warrington, PA) and cured at 70"C for 8 h. Thin sections were observed on an Olympus BX60 light microscope connected to a Sony CCD-IRIS/RGB (Hyper HAD) color video camera. Images were digitized usina a personal computer equipped with an Integral Technologies, Inc. "Flashpoint 128" frame capture board, and analyzed with Image-Pro Plus (Media Cybernetics. Inc.) software. the eastern Pacific (7), and Mayotte. in the western Indian Ocean (13) exists in other corals, and if so, whether endo- lithic microboring fungi are able to keep pace with skeletal accretion rates and to interact with corals that exhibit rapid axial growth. The corals selected for s
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
