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Fig. 5 | Zoological Letters

Fig. 5

From: Branching pattern and morphogenesis of medusa tentacles in the jellyfish Cladonema pacificum (Hydrozoa, Cnidaria)

Fig. 5

Effect of MEK inhibitor on branch formation. ad Tentacle images of a control (a, c) and a UO126-treated (b, d) medusa on Days 6 (a, b) and 8 (c, d). The insets in the images are blown-up from the regions indicated by arrows. Arrowheads represent the presence (a, c) or absence (b, d) of the second (a, b) (Branch) and third (c, d) (Branch) branches. The mean numbers of branches observed are indicated in the right-bottom corner of the images. Samples were treated with DMSO or UO126 for two days either from Day 4 to 6 (a, b) or from Day 6 to 8 (c, d), during which most of the second or third branches, respectively, form normally (Fig. 2j). Feeding was terminated before drug treatment to prevent tentacle growth from affecting the results. Scale bars: 200 μm

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