. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. MDH ISOZYMES OF SCYPHOZOANS 275 Aurelia aurita Chrysaora quinquecirrha Cyanea capillata [MEDUSAE] •9 OVA X EPHYRAE OVA X EPHYRAE OVA X EPHYRAE SPERMATOZOA k / SPERMATOZOA k. / SPERMATOZOA PLANULA- CYST. STROBILA PLANULA STROBILA SCYPHISTOMA SCYPHISTOMA SCYPHISTOMA I! It PODOCYSTS PODOCYSTS FIGURE 5. Life cycles of Chesapeake Bay jellyfish. In A. aurita, the change of the MDH isozyme pattern is restricted to the cytosol MDH. Because the genes which are responsible for the synthesis of mito- chonclrial MDH are always in the sa
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. MDH ISOZYMES OF SCYPHOZOANS 275 Aurelia aurita Chrysaora quinquecirrha Cyanea capillata [MEDUSAE] •9 OVA X EPHYRAE OVA X EPHYRAE OVA X EPHYRAE SPERMATOZOA k / SPERMATOZOA k. / SPERMATOZOA PLANULA- CYST. STROBILA PLANULA STROBILA SCYPHISTOMA SCYPHISTOMA SCYPHISTOMA I! It PODOCYSTS PODOCYSTS FIGURE 5. Life cycles of Chesapeake Bay jellyfish. In A. aurita, the change of the MDH isozyme pattern is restricted to the cytosol MDH. Because the genes which are responsible for the synthesis of mito- chonclrial MDH are always in the same activated states, the explanation that certain genes for energy production are activated is not applicable. It should be noted that differences in the life cycles of these three Chesapeake Bay jellyfish exist (Figure 5). C. capillata planulae develop into planulocysts, which undergo further development into scyphistomae. The C. quinquecirrha planulae develop directly into scyphistomae, without formation of the planulocysts, and the scyphisto- mae normally form numerous podocysts. Furthermore, the scyphistomae may undergo transformation to form podocysts under adverse conditions, and may revert back to scyphistomae when the adverse conditions are removed. In contrast, cyst formation in the life cycle of A. aurita from Chesapeake Bay has not been observed. This may account for differences in the MDH isozyme patterns changes in A. aurita when compared to the other two scyphozoans. The electrophoretic pattern of glucose-6-phosphate dehydrogenase is unlike that of other enzymes of scyphozoan jellyfish (Lin and Zubkoff, 1973; Zubkoff and Lin, 1975). MDH, superoxide dismutase (SOD, EC -- terazolium ox\- dase), and esterase of Chesapeake Bay jellyfish all have isozyme patterns whereas G6PD appears as a single band in the polyacrylamide gel enzyme assay. Although Blanquet (1972) indicated that scyphistomae of C. quinquecirrha have an increased G6PD activity during cold acc
Size: 1132px × 2208px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
