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Kawafune K, Hongoh Y, Hamaji T, Sakamoto T, Kurata T, Hirooka S, Miyagishima SY, Nozaki H. Two different rickettsial bacteria invading Volvox carteri. PLoS One 2015; 10:e0116192. [PMID: 25671568 PMCID: PMC4324946 DOI: 10.1371/journal.pone.0116192] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2014] [Accepted: 12/02/2014] [Indexed: 12/02/2022] Open
Abstract
BACKGROUND Bacteria of the family Rickettsiaceae are principally associated with arthropods. Recently, endosymbionts of the Rickettsiaceae have been found in non-phagotrophic cells of the volvocalean green algae Carteria cerasiformis, Pleodorina japonica, and Volvox carteri. Such endosymbionts were present in only C. cerasiformis strain NIES-425 and V. carteri strain UTEX 2180, of various strains of Carteria and V. carteri examined, suggesting that rickettsial endosymbionts may have been transmitted to only a few algal strains very recently. However, in preliminary work, we detected a sequence similar to that of a rickettsial gene in the nuclear genome of V. carteri strain EVE. METHODOLOGY/PRINCIPAL FINDINGS Here we explored the origin of the rickettsial gene-like sequences in the endosymbiont-lacking V. carteri strain EVE, by performing comparative analyses on 13 strains of V. carteri. By reference to our ongoing genomic sequence of rickettsial endosymbionts in C. cerasiformis strain NIES-425 cells, we confirmed that an approximately 9-kbp DNA sequence encompassing a region similar to that of four rickettsial genes was present in the nuclear genome of V. carteri strain EVE. Phylogenetic analyses, and comparisons of the synteny of rickettsial gene-like sequences from various strains of V. carteri, indicated that the rickettsial gene-like sequences in the nuclear genome of V. carteri strain EVE were closely related to rickettsial gene sequences of P. japonica, rather than those of V. carteri strain UTEX 2180. CONCLUSION/SIGNIFICANCE At least two different rickettsial organisms may have invaded the V. carteri lineage, one of which may be the direct ancestor of the endosymbiont of V. carteri strain UTEX 2180, whereas the other may be closely related to the endosymbiont of P. japonica. Endosymbiotic gene transfer from the latter rickettsial organism may have occurred in an ancestor of V. carteri. Thus, the rickettsiae may be widely associated with V. carteri, and likely have often been lost during host evolution.
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Affiliation(s)
- Kaoru Kawafune
- Department of Biological Sciences, Graduate School of Science, University of Tokyo, Bunkyo-ku, Tokyo, Japan
| | - Yuichi Hongoh
- Department of Biological Sciences, Graduate School of Bioscience and Biotechnology, Tokyo Institute of Technology, Ookayama, Meguro-ku, Tokyo, Japan
| | - Takashi Hamaji
- Donald Danforth Plant Science Center, Saint Louis, Missouri, United States of America
| | - Tomoaki Sakamoto
- Plant Global Education Project, Graduate School of Biological Sciences, Nara Institute of Science and Technology, Ikoma, Nara, Japan
| | - Tetsuya Kurata
- Plant Global Education Project, Graduate School of Biological Sciences, Nara Institute of Science and Technology, Ikoma, Nara, Japan
| | - Shunsuke Hirooka
- Center for Frontier Research, National Institute of Genetics, Mishima, Shizuoka, Japan
| | - Shin-ya Miyagishima
- Center for Frontier Research, National Institute of Genetics, Mishima, Shizuoka, Japan
| | - Hisayoshi Nozaki
- Department of Biological Sciences, Graduate School of Science, University of Tokyo, Bunkyo-ku, Tokyo, Japan
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Mogi Y, Hamaji T, Suzuki M, Ferris P, Mori T, Kabeya Y, Miyagishima SY, Nozaki H. EVIDENCE FOR TUBULAR MATING STRUCTURES INDUCED IN EACH MATING TYPE OF HETEROTHALLIC GONIUM PECTORALE (VOLVOCALES, CHLOROPHYTA)(1). JOURNAL OF PHYCOLOGY 2012; 48:670-4. [PMID: 27011083 DOI: 10.1111/j.1529-8817.2012.01149.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Gametes were induced separately in cultures of each mating type of the heterothallic, isogamous colonial volvocalean Gonium pectorale O. F. Müll. to examine the tubular mating structure (TMS) of both mating types plus and minus (plus and minus), referred to as "bilateral mating papillae." Addition of dibutyryl cyclic adenosine monophosphate (DcAMP or db-cAMP) and 3-isobutyl-1-methylxanthine (IBMX) to approximately 3-week-old cultures of each mating type induced immediate release of naked gametes from the cell walls. Both plus and minus gametes formed a TMS in the anterior region of the protoplasts. Accumulation of actin was visualized by antibody staining in the TMS of both mating types as occurs in the TMS (fertilization tubule) of the plus gametes of the unicellular volvocalean Chlamydomonas reinhardtii P. A. Dang. Induction of naked gametes with a TMS in each mating type will be useful for future cell biological and evolutionary studies of the isogametes of colonial volvocalean algae.
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Affiliation(s)
- Yuko Mogi
- Department of Biological Sciences, Graduate School of Science, University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo 113-0033, JapanDepartment of Botany, Laboratory of Plant Molecular Genetics, Kyoto University, Oiwake-cho, Kita-shirakawa, Sakyo-ku, Kyoto 606-8502, JapanDepartment of Biological Sciences, Graduate School of Science, University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo 113-0033, JapanDepartment of Ecology and Evolutionary Biology, University of Arizona, Tucson, Arizona 85721, USAWaseda Institute for Advanced Study (WIAS), Waseda University, 1-6-1 Nishiwaseda, Shinjuku-ku, Tokyo 169-8050, JapanCenter for Frontier Research, National Institute of Genetics, 1111 Yata, Mishima, Shizuoka 411-8540, JapanDepartment of Biological Sciences, Graduate school of Science, University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Takashi Hamaji
- Department of Biological Sciences, Graduate School of Science, University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo 113-0033, JapanDepartment of Botany, Laboratory of Plant Molecular Genetics, Kyoto University, Oiwake-cho, Kita-shirakawa, Sakyo-ku, Kyoto 606-8502, JapanDepartment of Biological Sciences, Graduate School of Science, University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo 113-0033, JapanDepartment of Ecology and Evolutionary Biology, University of Arizona, Tucson, Arizona 85721, USAWaseda Institute for Advanced Study (WIAS), Waseda University, 1-6-1 Nishiwaseda, Shinjuku-ku, Tokyo 169-8050, JapanCenter for Frontier Research, National Institute of Genetics, 1111 Yata, Mishima, Shizuoka 411-8540, JapanDepartment of Biological Sciences, Graduate school of Science, University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Masahiro Suzuki
- Department of Biological Sciences, Graduate School of Science, University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo 113-0033, JapanDepartment of Botany, Laboratory of Plant Molecular Genetics, Kyoto University, Oiwake-cho, Kita-shirakawa, Sakyo-ku, Kyoto 606-8502, JapanDepartment of Biological Sciences, Graduate School of Science, University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo 113-0033, JapanDepartment of Ecology and Evolutionary Biology, University of Arizona, Tucson, Arizona 85721, USAWaseda Institute for Advanced Study (WIAS), Waseda University, 1-6-1 Nishiwaseda, Shinjuku-ku, Tokyo 169-8050, JapanCenter for Frontier Research, National Institute of Genetics, 1111 Yata, Mishima, Shizuoka 411-8540, JapanDepartment of Biological Sciences, Graduate school of Science, University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Patrick Ferris
- Department of Biological Sciences, Graduate School of Science, University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo 113-0033, JapanDepartment of Botany, Laboratory of Plant Molecular Genetics, Kyoto University, Oiwake-cho, Kita-shirakawa, Sakyo-ku, Kyoto 606-8502, JapanDepartment of Biological Sciences, Graduate School of Science, University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo 113-0033, JapanDepartment of Ecology and Evolutionary Biology, University of Arizona, Tucson, Arizona 85721, USAWaseda Institute for Advanced Study (WIAS), Waseda University, 1-6-1 Nishiwaseda, Shinjuku-ku, Tokyo 169-8050, JapanCenter for Frontier Research, National Institute of Genetics, 1111 Yata, Mishima, Shizuoka 411-8540, JapanDepartment of Biological Sciences, Graduate school of Science, University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Toshiyuki Mori
- Department of Biological Sciences, Graduate School of Science, University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo 113-0033, JapanDepartment of Botany, Laboratory of Plant Molecular Genetics, Kyoto University, Oiwake-cho, Kita-shirakawa, Sakyo-ku, Kyoto 606-8502, JapanDepartment of Biological Sciences, Graduate School of Science, University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo 113-0033, JapanDepartment of Ecology and Evolutionary Biology, University of Arizona, Tucson, Arizona 85721, USAWaseda Institute for Advanced Study (WIAS), Waseda University, 1-6-1 Nishiwaseda, Shinjuku-ku, Tokyo 169-8050, JapanCenter for Frontier Research, National Institute of Genetics, 1111 Yata, Mishima, Shizuoka 411-8540, JapanDepartment of Biological Sciences, Graduate school of Science, University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Yukihiro Kabeya
- Department of Biological Sciences, Graduate School of Science, University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo 113-0033, JapanDepartment of Botany, Laboratory of Plant Molecular Genetics, Kyoto University, Oiwake-cho, Kita-shirakawa, Sakyo-ku, Kyoto 606-8502, JapanDepartment of Biological Sciences, Graduate School of Science, University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo 113-0033, JapanDepartment of Ecology and Evolutionary Biology, University of Arizona, Tucson, Arizona 85721, USAWaseda Institute for Advanced Study (WIAS), Waseda University, 1-6-1 Nishiwaseda, Shinjuku-ku, Tokyo 169-8050, JapanCenter for Frontier Research, National Institute of Genetics, 1111 Yata, Mishima, Shizuoka 411-8540, JapanDepartment of Biological Sciences, Graduate school of Science, University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Shin-Ya Miyagishima
- Department of Biological Sciences, Graduate School of Science, University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo 113-0033, JapanDepartment of Botany, Laboratory of Plant Molecular Genetics, Kyoto University, Oiwake-cho, Kita-shirakawa, Sakyo-ku, Kyoto 606-8502, JapanDepartment of Biological Sciences, Graduate School of Science, University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo 113-0033, JapanDepartment of Ecology and Evolutionary Biology, University of Arizona, Tucson, Arizona 85721, USAWaseda Institute for Advanced Study (WIAS), Waseda University, 1-6-1 Nishiwaseda, Shinjuku-ku, Tokyo 169-8050, JapanCenter for Frontier Research, National Institute of Genetics, 1111 Yata, Mishima, Shizuoka 411-8540, JapanDepartment of Biological Sciences, Graduate school of Science, University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Hisayoshi Nozaki
- Department of Biological Sciences, Graduate School of Science, University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo 113-0033, JapanDepartment of Botany, Laboratory of Plant Molecular Genetics, Kyoto University, Oiwake-cho, Kita-shirakawa, Sakyo-ku, Kyoto 606-8502, JapanDepartment of Biological Sciences, Graduate School of Science, University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo 113-0033, JapanDepartment of Ecology and Evolutionary Biology, University of Arizona, Tucson, Arizona 85721, USAWaseda Institute for Advanced Study (WIAS), Waseda University, 1-6-1 Nishiwaseda, Shinjuku-ku, Tokyo 169-8050, JapanCenter for Frontier Research, National Institute of Genetics, 1111 Yata, Mishima, Shizuoka 411-8540, JapanDepartment of Biological Sciences, Graduate school of Science, University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo 113-0033, Japan
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