Life Cycle of Peridinium sp. B3 (Dinophyceae) Isolated from Lake Begnas, Nepal

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概要

• 論文の詳細を見る

• Encystment and excystment in the life cycle of a dinoflagellate Peridinium sp.B3,which was isolated from Lake Begnas in the Pokhara Valley, Nepal, were investigated by use of a clonal population. The maximum cell concentration was 3×10^3 vegetative cells・ml^<-1> in BL medium after about 4 weeks at 30℃. Sexual reproduction of the cells was induced after the cells in late logarithmic phase were inoculated into nitrogen and phosphorous deficient medium, and also was spontaneously induced in BL medium. Sexual reproduction was isogamous and homothallic. The cycle was initiated by gamete formation, in which gametes were produced by binary asexual divisions of the vegetative cells. Fusing pairs were formed by the mid-ventral union of gametes. The planozygote retained two red bodies and remained motile for about 2 weeks. Two weeks after the planozygote lost motility, the zygotes enlarged and became dark in color. The theca of the planozygote split around the girdle region and the hypnozygote (cyst) was produced. The matured cysts were dormant and remained viable for at least 1 month at 10℃ in darkness following maturation for 3 months at 30℃. The dark-cold treated cysts excysted synchronously when the incubation temperature was raised to 30℃. The protoplast emerged from the cyst wall by amoeboid movement. The excysted cell had two red bodies. This cell divided within 24-48 h into 2 daughter cells each with a red body.

• 日本微生物生態学会の論文
• 1986-08-10

著者

• Ishida Y

  Laboratory Of Microbiology Department Of Fisheries Faculty Of Agriculture Kyoto University

• Ishida Yuzaburo

  Laboratory Of Marine Microbiology Department Of Applied Bioscience Graduate School Of Agriculture Ky

• SAKO Yoshihiko

  Laboratory of Marine Microbiology, Department of Applied Bioscience, Graduate School of Agriculture,

• Shrestha Keshab

  Laboratory Of Microbiology Department Of Fisheries Faculty Of Agriculture Kyoto University

• Shrestha Rajendra

  Natural History Museum Institute Of Science And Technology Tribhuvan University

• Sako Y

  Graduate School Of Agriculture Kyoto University

• Sako Yoshihiko

  Laboratory Of Microbiology Department Of Fisheries Faculty Of Agriculture Kyoto University

• Sako Yoshihiko

  Laboratory Of Marine Microbiology Division Of Applied Biosciences Graduate School Of Agriculture Kyo

• Nakanishi Masami

  Otsu Hydrobiological Station Faculty Of Science Kyoto University

• KONDA TOSHIFUMI

  Department of Biology, Faculty of Science, Tokyo Metropolitan University

• SHRESTHA KESHAB

  Natural History Museum, Institute of Science and Technology, Tribhuvan University

• BHANDARY HEMANTA

  Natural History Museum, Institute of Science and Technology, Tribhuvan University

• KADOTA HAJIME

  Department of Fisheries, Faculty of Agriculture, Kinki University

• Kadota Hajime

  Department Of Fisheries Faculty Of Agriculture Kinki University

• Konda Toshifumi

  Department Of Biology Faculty Of Science Tokyo Metropolitan University:(present Address)laboratory O

• Konda Toshifumi

  Department Of Bacterial And Blood Products National Institute Of Infectious Diseases

• Bhandary Hemanta

  Natural History Museum Institute Of Science And Technology Tribhuvan University

• Sako Yoshihiko

  Laboratory Of Marine Microbiology Department Of Applied Bioscience Graduate School Of Agriculture Ky

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