#那些演化留下來的未解之謎
閱讀本文前想一下自己的背側腹側,
長了那些構造?
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#背腹翻轉 ㊙
你可能沒想到的是,背部的神經管曾經長在腹側!
包含人類在內的 #脊索動物 具有一個獨一無二的特徵➡消化系統在腹側,神經管則位於背側。百年來一直都是生物學家無法解釋的演化奧秘。
😉#研編解釋:想想蝦子背部那條黑線🦐,那可是他們的消化道啊❗
中央研究院細胞與個體生物學研究所蘇怡璇副研究員,及臨海研究站游智凱主任發現,#口部位置的變化是脊索動物背腹翻轉的關鍵。
他們發現動物胚胎發育從 #口部消失 產生變化,推測將於對側產生新開口,致使神經管與消化管方向對調。
✅論文已於今(2019)年6月發表於《美國國家科學院院刊》(PNAS):https://www.pnas.org/content/early/2019/06/11/1901919116
📍新聞稿:https://www.sinica.edu.tw/ch/news/6293
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The evolutionary origin of our own Phylum – Chordata, has puzzled biologists for centuries. One of the novel characteristics that draws extensive discussion is that of the chordate central nervous system (CNS), which exists in a dorsoventrally inverse orientation relative to other bilaterally symmetric animals.
The research team led by Drs. Yi-Hsien Su and Jr-Kai Yu at the Institute of Cellular and Organismic Biology, Academia Sinica (Taiwan), tackle these questions by using hemichordates (acorn worm), echinoderms (sea urchin), and cephalochordates (amphioxus) as model organisms.
📍Press Release:https://www.sinica.edu.tw/en/news/6293
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📍媒體報導
[自由時報] 胃原本長在背後 中研院追出翻轉關鍵
https://news.ltn.com.tw/news/life/breakingnews/2855994
[中國時報] 中研院揭露脊索動物演化轉折 獲刊國際期刊
https://www.chinatimes.com/realtimene…/20190717002342-260405
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