Chloroplast phylogenomics to resolve the phylogenetic relationships of major taxonomic groups in bryophytes

2013 Fiscal Year Final Research Report

• Project/Area Number: 23370045
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Biodiversity/Systematics
• Research Institution: Hiroshima University
• Principal Investigator: DEGUCHI Hironori 広島大学, 理学(系)研究科(研究院), 特任教授 (60117017)
• Co-Investigator(Kenkyū-buntansha): YAMAGUCHI Tomio 広島大学, 大学院・理学研究科, 教授 (60244290) ; TSUBOTA Hiromi 広島大学, 大学院・理学研究科, 准教授 (10332800) ; SHIMAMURA Masaki 広島大学, 大学院・理学研究科, 助教 (00432708) ; SAKAKIBARA Keiko 広島大学, 大学院・理学研究科, 特任助教 (90590000)
• Co-Investigator(Renkei-kenkyūsha): KURABAYASHI Atsushi 広島大学, 大学院・理学研究科, 助教 (00327701)
• Project Period (FY): 2011-04-01 – 2014-03-31
• Keywords: コケ植物 / 葉緑体ゲノム / 分子系統 / 分類 / 進化

Research Abstract

Chloroplast genomes of seven mosses, two liverworts and one hornworts species were newly sequenced. Comparison of the chloroplast genomes showed that T. lepidozioides had the largest cp genome in the mosses and the gene content was almost identical to those of liverworts and hornworts. Some gene-loss events through the evolution were indicated to be effective for considering the relationships of major moss lineages.
In addition, we firstly detected linear and circular DNA molecules of chloroplast genome in a Sphagnum moss. Some larger molecules seem to be derived from multimeric conformations of single genomes. The occurrence of linear and multimeric molecules also have been known in some flowering plants. Such structural plasticity of the chloroplast genome seems to be evolutionary conserved across land plants.

Research Products

• [Presentation] セン類ヨツバゴケとアリノオヤリの交雑に関する遺伝学的解析 (2013)
  • Author(s): 大西弥真人・ 山口富美夫・ 嶋村正樹
  • Organizer: 日本蘚苔類学会第42回大会
  • Place of Presentation: 岡山
  • Year and Date: 2013-08-06
• [Presentation] クモノスゴケの葉緑体ゲノムの構造 (2013)
  • Author(s): 友岡秀文・ 嶋村正樹・ 山口富美夫・ 出口博則
  • Organizer: 日本蘚苔類学会第42回大会
  • Place of Presentation: 岡山
  • Year and Date: 2013-08-06
• [Presentation] セン類イシヅチゴケの葉緑体ゲノム構造 (2012)
  • Author(s): 定光淳・ 嶋村正樹・ 榊原恵子・ 山口登美夫・ 出口博則
  • Organizer: 日本植物学会第76回大会
  • Place of Presentation: 姫路
  • Year and Date: 2012-09-16
• [Presentation] The complete chloroplast genome sequences of four early divergent mosses : Takakia lepidozioides (Takakiopsida) , Sphagnum palustre (Sphagnopsida) , Andreaea nivalis (Andreaeopsida) and Oedipodium griffithianum (Oedipodiopsida) (2012)
  • Author(s): Sadamitsu, A. , Kosugi, I. , Sakakibara, K. , Tsubota, H. , Yamaguchi, T. , Deguchi, H. & Shimamura, M
  • Organizer: Third International Symposium on Molecular Systematics of Bryophytes
  • Place of Presentation: NY, USA
  • Year and Date: 2012-06-16
• [Presentation] 葉緑体遺伝子大規模データセットに基づくセン類の分子系統解析 (2012)
  • Author(s): 定光淳・ 坪田博美・ 嶋村正樹・ 榊原恵子・ 山口登美夫・ 出口博則
  • Organizer: 日本植物分類学会第11回大会
  • Place of Presentation: 大阪
  • Year and Date: 2012-03-24
• [Presentation] 葉緑体ゲノム構造からみたコケ植物セン類の系統関係 (2011)
  • Author(s): 定光淳・ 小杉一誠・ 嶋村正樹・ 山口富美夫・ 出口博則
  • Organizer: 日本植物学会第75回大会
  • Place of Presentation: 東京
  • Year and Date: 2011-08-17
• [Presentation] コケ植物セン類の葉緑体ゲノム構造の多様性 (2011)
  • Author(s): 小杉一誠・ 定光淳・ 嶋村正樹・ 山口富美夫・ 出口博則
  • Organizer: 日本蘚苔類学会第40回大会
  • Place of Presentation: 奈良
  • Year and Date: 2011-08-09