Evolution of laminarialean kelp beds deduced from the genomics and morphological features

2015 Fiscal Year Final Research Report

• Project/Area Number: 25291087
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Biodiversity/Systematics
• Research Institution: Kobe University
• Principal Investigator: Kawai Hiroshi 神戸大学, 内海域環境教育研究センター, 教授 (30161269)
• Co-Investigator(Kenkyū-buntansha): HANYUDA TAKEAKI 神戸大学, 自然科学系先端融合研究環内海域環境教育研究センター, 助教 (40379334) ; YAMAGISHI TAKAHIRO 神戸大学, 自然科学系先端融合研究環, 助教 (30379333) ; NAGASATO CHIKAKO 北海道大学, 北方生物圏フィールド科学センター, 准教授 (00374710)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: コンブ目 / 進化 / 分子系統 / トランスクリプトーム / 褐藻

Outline of Final Research Achievements

The molecular phylogeny of derived Laminariales using 6 chloroplast and 6 mitochondrial gene sequences revealed that Alariaceae and Agaraceae/Laminariaceae diverged from Aureophycaceae and the Agaraceae branched. This suggested that the formation of mucilaginous organs and pneumatocysts occurred in the relatively early stage of the evolution of derived Laminariales, and the adaptation to temperate habitat from cold-water habitat, and dispersal to the Southern Hemisphere occurred several time independently in different lineages in laminarialean families. Transcroptome analyses suggested that the diversification of mannurate c5 epimarase and metaroprotease played important roles in the anatomical differenciation of derived Laminariales.

Free Research Field

藻類学