活動詳細資訊 Event Information
活動詳細資訊 Event Information
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活動訊息最後更新時間 : 2016-11-16 11:22:28
開始日期 Starting Date:2016-11-29  10:30
結束日期 Ending Date:2016-11-29  12:00
會議狀態 State:確定 Definitive
主/協辦單位 Organizer:生物多樣性研究中心 Biodiversity Research Center
活動地點 Venue:跨領域科技研究大樓 1 樓演講廳 Auditorium, 1st Floor, Interdisciplinary Research Building
活動備忘 Event Memo:

Abstract
    
        The emergence of complex morphology is one of major evolutionary outcomes of phenotypic diversification. In some carnivorous plants, planar leaves of common ancestors have been modified to be a pitcher shape. However, how the planar development is altered in the morphological evolution of pitcher leaves remains unknown. Here we show that the pitcher leaves of Sarracenia purpurea develop through unique cell division patterns of adaxial tissues subsequent to regular expression of adaxial and abaxial marker genes. Differently oriented cell divisions in distal and proximal parts of the adaxial domain cause bifacial growth and adaxial ridge protrusion, respectively. Such discrepant growth patterns result in the establishment of pitcher morphology. A morphogenetic simulation with vertex dynamics model suggests that the cell division plane is critical for the acquisition of the novel morphology. Our result implies that tissue-specific change of cell division orientation underlies a drastic morphological evolution of plant organs.
To further investigate the evolution of pitcher leaves, we selected the Australian pitcher plant Cephalotus follicularis, which produces both carnivorous pitcher and non-carnivorous flat leaves, enabling us to deduce carnivory-related genes by comparative approaches in a single species. To understand the genomic changes associated with the evolution of carnivory, we sequenced 2-Gbp genome of C. follicularis with Illumina and PacBioRS. Transcript-based gene prediction with RNA-seq reads found 45,469 gene models. Transcriptome comparison of the flat and pitcher leaves identified differentially expressed genes between flat and pitcher leaves and analysis of genes involved in pitcher development and digestive enzymes will be presented.
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