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タイトル :Significance of Photosynthetic Products of Symbiotic Chlorella to Establish the Endosymbiosis and to Express the Mating Reactivity Rhythm in Paramecium bursaria
著者 :TANAKA, Miho / MIWA, Isoji
作成日 :1996
要約(Abstract) :Paramecium bursaria contain several hundred cells of the green algae Chlorella as endosymbionts and are designated green. Chlorella-free white cells can be obtained from natural green cells by rapid growth in constant darkness (DD). Chlorella were isolated easily from their host cells and re-infected. The infection of Chlorella was restrained by a photosynthesis inhibitor (DCMU). This result can be related with the fact that symbiotic Chlorella release their photosynthetic products. Furthermore, when green cells were cultured in DD, the number of endosymbiotic Chlorella decreased and the density of host cells increased. On the other hand, the mating reactivity rhythm of green cells disappeared in DD. The photosynthetic products of symbiotic Chlorella, maltose and oxygen, induced the rhythms of their host cells in DD, but they could not shift the phase of the rhythms. Moreover, arrhythmic mutant white cells reverted to rhythmicity after infection with Chlorella isolated from wild type green cells. Thus the photosynthetic products released by endosymbiotic Chlorella have important roles in the establishing of the endosymbiosis and the expression of circadian rhythms in P. bursaria cells.
収録種別 :雑誌掲載論文
出版社版URL :http://www.bioone.org/doi/full/10.2108/zsj.13.685
URI :http://hdl.handle.net/10109/1972
掲載雑誌 :Zoological Science Vol.13 no.5 p.685 -692
出現コレクション:雑誌掲載論文(理学部)

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