. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. ANEMONE-DINOFLAGELLATE SYMBIOSIS SPECIFICITY 7M Table 1 Infectivity over time of different Symbiodinium isolmc on aposyrnbiotic Atptasia iint'iiionc-* Alaal strain (elude! Weeks follow inn inoculation Original source of isolate Control (none) CS156(C) HA3-5 (A) Hh2a(A) Tc2a(A) CS164 (B) Aiptasia FIZ (B) Mixture eit above Montipora verrucosa (coral) Free-living in subtidal sand Hippopus hippopus (tridacmd) Trittucna crocea (tridacmd) Aiptasia tagetes (anemone) Aiptasia sp. (anemone) All of above _|_day2 [ —] = no infection; [
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. ANEMONE-DINOFLAGELLATE SYMBIOSIS SPECIFICITY 7M Table 1 Infectivity over time of different Symbiodinium isolmc on aposyrnbiotic Atptasia iint'iiionc-* Alaal strain (elude! Weeks follow inn inoculation Original source of isolate Control (none) CS156(C) HA3-5 (A) Hh2a(A) Tc2a(A) CS164 (B) Aiptasia FIZ (B) Mixture eit above Montipora verrucosa (coral) Free-living in subtidal sand Hippopus hippopus (tridacmd) Trittucna crocea (tridacmd) Aiptasia tagetes (anemone) Aiptasia sp. (anemone) All of above _|_day2 [ —] = no infection; [day#] = observed time of initial infection; ( + ] = extent of infection. relative growth of the algal populations in different treat- ments. Anemones inoculated with the clade B isolate (CS164) or Aiptasia FIZ (clade B algae) from anemones were successfully infected, with dense algal populations in the hosts' tentacles and basal columns. Those inoculated with a mixture of all isolates were also successfully in- fected. Infectivity of the different algal isolates, as deter- mined by microscopic observation, was the same whether the previously bleached hosts were fed or unfed. Comparison of the external morphology of different Symbiodinium isolates The coccoid forms of Symbiodinium isolates seen under a scanning electron microscope appeared similar, except for size (data not shown). The same was true for all motile forms. No motile forms were observed among symbionts that were freshly isolated from Aiptasia. It is difficult, if not impossible, to distinguish one isolate from the other based on their external morphology ( Trench and Blank 1987, LaJeunesse, 2001). Stability of induced symbioses over time and upon re-inoculation Figure 2 shows the population profiles of the S\mhi«- dininni isolates used for inoculating the anemones, the algal populations present in the anemones 1 to 3 months after initial inoculation, and the algal populations 1 month after re-inoculation wit
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
