Abstract
Porphyra vietnamensis Tanaka & Pham-Hoang Ho is a tropical species of high potential for farming. Studies of the life cycle have been conducted for many years but have not been successful until recently. Mature thalli were collected from Songkhla, in the southern part of Thailand, and were used to obtain ‘Conchocelis’ in the laboratory in Bangkok. ‘Conchocelis’ in shells as well as free-floating filaments could be observed after one week of incubation at 25 °C, 25‰ salinity and 350–500 lux light intensity, and covered the culture shell surface within 2 months. Conchosporangia were formed after being incubated for 10 days at 30 °C, 20‰ salinity under light intensities of 350–500 lux with a photoperiod of 12 hours a day. Induction of conchospore release was achieved by lowering the temperature to 25 °C and the salinity to 10–15‰ and increasing the light intensity to 800–1000 lux. Liberated conchospores germinated into young thalli which became mature after 70 days.
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Lewmanomont, K., Chittpoolkusol, O. Life cycle of Porphyra vietnamensis Tanaka & Pham-Hoang Ho from Thailand. Hydrobiologia 260, 397–400 (1993). https://doi.org/10.1007/BF00049047
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DOI: https://doi.org/10.1007/BF00049047