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Fig. 6 | Zoological Letters

Fig. 6

From: Polymorphism in the symmetries of gastric pouch arrangements in the sea anemone D. lineata

Fig. 6

A biradially symmetrical arrangement for 12-striped individuals (24 pouches) in the model simulation. Temporal evolution of the concentrations of a, b, and c in a semilogarithmic plot (left panel) as a function of the gastric pouch index (Fig. 5f) and 2-D arrangement of specified and nonspecified pouches (right panel). Except for the initial condition (t = 0) of the two PDs positioned oppositely (Fig. 5f), the definitions of the colors, lines, and indexes used in each panel and the model setting are identical to those in Fig. 5g. Following the same rule of irreversible specification in Fig. 5g, pouches neighboring two PDs remain nonspecified pouches due to the suprathreshold of b and c (a > Ta, b,c > Ti) (t = 1, gastric pouch index = 2, 12, 14, 24). Adjacent pouches to these pouches, in which the suprathreshold of a was achieved, are specified as P2s due to subthreshold c (a > Ta, b > Ti, c < Ti) (t = 1, gastric pouch index = 3, 11, 15, 23). B and C Secretion from P2s surrounding pouches as nonspecified pouches (a > Ta, b,c > Ti) (t = 2, gastric pouch index = 4, 10, 16, 22). Adjacent pouches to these pouches are irreversibly specified as first pouches (P1s) due to the subthreshold of b (a > Ta, b < Ti, c > Ti) (t = 2, gastric pouch index = 5, 9, 17, 21). Surrounding pouches are left as nonspecified pouches, and the adjacent pouches are irreversibly specified as P2s due to the subthreshold of c (a > Ta, b > Ti, c < Ti) (t = 3, gastric pouch index = 7, 19). Gray dotted lines indicate symmetry planes (right bottom panel)

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