Effects of Temperature on the Germination of Marine Phytoflagellate Cysts
Keywords:
Chattonella spp., cyst germination, phytoflagellate, Protoperidinium pellucidum, temperatureAbstract
The effect of temperature on the germination of some phytoflagellate cysts was studied in two different temperature conditions, step-gradient temperature and constant temperature. The highest number of newly germinated cell of Scrippsiella spp., Alexandrium spp., Protoperidinium spp., Gyrodinium spp., Gymnodinium spp., and Diplopelta spp. was observed after incubation 2 or 3 days when the initial temperatures were 13 and/or 19 oC, but it took at least 5 days at the initial incubation temperature of 10 oC. The germination rates of phytoflagellate cyst under optimum window should be faster than the other temperature ranges. The optimum temperature for cyst germination of Alexandrium spp., Protoperidinium pellucidum Bergh and Protoperidinium spp. was considered to be at 16 oC. For Scrippsiella spp., Gymnodinium spp. (small) and Gymnodinium spp., the optimum temperature for their cyst germination was considered to be 13 oC, whereas that for Chattonella spp. could be as high as 25 oC.
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online 2452-316X print 2468-1458/Copyright © 2022. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/),
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