 หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Effects of Temperature on the Germination of Marine Phytoflagellate Cysts) ผู้เขียน: ดร.เชษฐพงษ์ เมฆสัมพันธ์, ศาสตราจารย์ , ดร.จารุมาศ เมฆสัมพันธ์, รองศาสตราจารย์ ,  Shigeru Montani สื่อสิ่งพิมพ์:pdf AbstractThe 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 ?C, but it took at least 5 days at the initial incubation temperature of 10 ?C. 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 ?C. For Scrippsiella spp., Gymnodinium spp. (small) and Gymnodinium spp., the optimum temperature for their cyst germination was considered to be 13 ?C, whereas that for Chattonella spp. could be as high as 25 ?C. |
 ที่มา:KASETSART UNIVERSITY FISHERIES RESEARCH BULLETINหัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : CHEMICAL COMPONENTS OF RED-BROWN MATERIAL IN CYST OF SCRIPPSIELLA TROCHOIDEA (DINOPHYCEAE)) ผู้เขียน:ดร.เชษฐพงษ์ เมฆสัมพันธ์, ศาสตราจารย์, Shigeru Montani สื่อสิ่งพิมพ์:pdf AbstractMarine dinoflagellate Scrippsiella trochoidea (Stein) Loeblich III was induced to form cyst under laboratory conditions. The cysts of dinoflagellate generally have red-brown material containing in cytoplasm. This present study attempted to examine the chemical components of this material. The results demonstrated that the red-brown material composed of fucoxanthin, 19'-hexanoyl fucoxanthin, diadinoxanthin and diatoxanthin. Furthermore, glutamic acid and glycine were found to be the dominant amino acid components of the red-brown material. The result was also revealed that the red-brown material was not composed of polysaccharides. The results from the observation of red-brown material after cyst germination suggesfed that the red-brown material may be useful for growth of vegetative cell after germination from cyst. |