Formation and growth of filamentous thalli from isolated utricles with medullary filaments of Codium fragile spongy thalli
Nanba, N.; Kado, R.; Ogawa, H.; Komuro, Y. (2002). Formation and growth of filamentous thalli from isolated utricles with medullary filaments of Codium fragile spongy thalli. Aquat. Bot. 73(3): 255-264. https://dx.doi.org/10.1016/S0304-3770(02)00036-0
In: Aquatic Botany. Elsevier Science: Tokyo; Oxford; New York; London; Amsterdam. ISSN 0304-3770; e-ISSN 1879-1522, more
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| Keywords |
Chloroplasts
Flora > Weeds > Marine organisms > Seaweeds
Population functions > Growth
Utricle
Codium fragile (Suringar) Hariot, 1889 [WoRMS]
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| Authors | | Top |
- Nanba, N.
- Kado, R.
- Ogawa, H.
- Komuro, Y.
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| Abstract |
Formation and growth of filamentous thalli from isolated utricles with medullary filaments of Codium fragile (Suringar) Hariot was studied in the laboratory. Immediately after isolation of the utricles, their fusiform chloroplasts began to be transferred, leading to formation of the filamentous thalli after culture for 2-6 days. The utricles became attached to the substratum by elongation of those thalli developing immediately after the initiation of formation. Differences in medullary filament length extending from the isolated utricles had no effect on the formation of the filamentous thalli from the utricles, nor their ability to attach to the substratum. The filamentous thalli remained viable for 32 weeks. One primordium of spongy thallus surrounded by many filamentous thalli regenerated from the isolated utricles after 6 weeks of culture, and the primordium grew into young spongy thallus with four axes and filamentous thalli by 10 weeks. Furthermore, its separated axes grew into young spongy thalli by 6 weeks of separation. The filamentous thalli and utricles of the regenerated spongy thalli contain numerous fusiform chloroplasts. These results suggest that the protoplasm containing numerous chloroplasts plays an important role in vegetative reproduction of the isolated utricles and filamentous thalli. |
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