2013.06.12 第16回GCOE国際セミナー

下記のとおりGCOE国際セミナーを開催します。講師はBrown大学のErika Edwardsさんです。系統種間比較による植物の形質進化の解明についてご講演いただく予定です(参照:http://www.brown.edu/Research/Edwards_Lab/projects.php)。ぜひご参加ください。なおこのセミナーはGCOEアジア保全生態学コース授業科目「国際セミナーI,II,Ⅲ」(Ⅰ,ⅡはD1,D2の必修科目)の一環として行われますので対象の学生は是非ご出席ください。


講演者:Erika Edwards (Brown University)

日時:6月12日(水)17:00〜18:00

場所:箱崎キャンパス理学部3号館5階3521室(生物第2会議室)

タイトル:Convergent evolution in plants

要旨:At first glance, plants are remarkably diverse, measured by any yardstick. A closer look, however, will reveal a very common set of ecological syndromes that have evolved time and time again, in many distantly related plant groups, suggesting that there are certain evolutionary trajectories in plants that are more 'accessible' than others. I will discuss the evolutionary history of two very distinct plant ecological syndromes: C4 photosynthesis, and the temperate deciduous leaf habit. In both cases, there is a strong phylogenetic clustering of origins, implying that certain lineages have an elevated evolutionary accessibility to these syndromes. In the case of C4 photosynthesis, we have identified a leaf anatomical trait in non-C4 relatives that may act as a precursor to the C4 syndrome. From our work on tropical-temperate transitions in the woody plant lineage Viburnum, we have identified a new suite of leaf traits that have co-evolved during movements into the northern temperate zone, and suggest a new hypothesis for why so many temperate trees have toothed or lobed leaves.
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