Dataset Fig2F_C-uchidai-growth_1
Project
408-Sarper-TentacleArrange
Title
Z-series and time-lapse images showing phyllotaxis-like periodic and symmetric tentacle arrangements
Description
Periodic organ arrangements occur during growth and development and are widespread in both animals and plants. In bilaterian animals, repetitive organs are typically arranged periodically in a two-dimensional space defined by two body axes. In contrast, radially symmetrical animals and plants exhibit organ arrangements in three-dimensional space—around the body axis in animals and around the stem in plants. While the principles of periodic organ arrangement have been extensively studied in bilaterians, investigations in radially symmetrical animals remain limited.
In the present study, the authors combined live imaging, quantitative analysis, and mathematical modeling to elucidate periodic organ arrangement in a radially symmetrical animal, Coryne uchidai (Cnidaria, Hydrozoa). The polyps of C. uchidai simultaneously formed multiple tentacles in a regularly spaced, ring-like pattern exhibiting radial symmetry. Multiple such rings appeared periodically along the body and largely maintained symmetrical organization.
Additionally, the researchers observed polymorphisms in symmetry types—specifically tri-, tetra-, and pentaradial symmetries—occurring as individual variations. Notably, the type of radial symmetry was positively correlated with polyp diameter, with pentaradial polyps exhibiting a larger diameter than tetra- or triradial ones. Their mathematical model suggested that the selection of size-dependent radial symmetry is governed by activation-inhibition dynamics and positional information emanating from the mouth that guides tentacle initiation.
Funding
This work
was supported by Grants-in-Aid for Scientific Research from the
Ministry of Education, Culture, Sports, Science, and Technology of
Japan for SS (22KJ3132) and KF (21K19297 and 22H04719).
Title
Time-lapse images of the growing polyps of Coryne uchidai
Description
Time lapse images of Coryne uchidai in various stages including hydranth bud formation, transformation, tentacle initiation, and polyp growth. The Coryne uchidai was visualized with bright field observation.
Description
The living Coryne uchidai.
Gene ontology: Biological processes
Gene ontology: Cellular components
Gene ontology: Molecular functions
Dimensions
1388x1040x211x1x106
Contrast enhancing methods
Resolution enhancing methods
Sample preparation methods
living tissue