科普專欄–薯不揀單 - 深入淺出–熊貓渡過寒冬的一道妙計

上集我們講述了小臭鼩應對寒冬的一道機制，今集我們將會講述熊貓應付寒冬的一道怪招。509Please respect copyright.ＰＥＮＡＮＡG4YlJtYk66
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（圖2）有研究發現（Ref1)，當攝氏低過15度的時候，熊貓會將馬糞塗滿全身，而且選糞中亦有一定的揀擇，牠們並不會採用暴露於大自然間超過10日的馬糞。509Please respect copyright.ＰＥＮＡＮＡl5IMcVaDx7
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為何會塗糞上身，而且為何又如此揀擇呢？509Please respect copyright.ＰＥＮＡＮＡ3BJ03qhU9h
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（圖3）最後科學家發現，新鮮馬糞含有一定份量的化合物，BCP/BCPO (beta-caryophyllene/caryophyllene oxide) ，而這些化合物具有抑壓負責感測寒冷的TRPM8蛋白質功效。509Please respect copyright.ＰＥＮＡＮＡv36N6zlOFL
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利用老鼠作實驗體，在牠們身體塗上BCP/BCPO液體以模仿熊貓塗馬糞的舉動，對比塗上鹽水的對照群組，塗上化合物液體的老鼠較傾向行走寒冷的地方，而且亦較少互相擁抱取暖。509Please respect copyright.ＰＥＮＡＮＡYihiWXE3CW
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因此科學家推斷，熊腦大有可能透過馬糞中的化合物抑制身體的TRPM8蛋白質，以自欺欺人的方式盡量減低身體感知寒冷的能力，使自己感覺良好渡過寒冬。509Please respect copyright.ＰＥＮＡＮＡ5SnH1EtgmG
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但為何熊貓會懂得馬糞中含有對應的化合物，那就還是一個無法拆解的謎。509Please respect copyright.ＰＥＮＡＮＡw4YlorNwCn
亦有可能的是，馬糞還有另外的功用尚未被揭曉出來。509Please respect copyright.ＰＥＮＡＮＡwJazSYFO82
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如果想我快啲出文的話，請入去Penana網站科普專欄–薯不揀單俾一個like以及Bookmark，這對我非常之重要。509Please respect copyright.ＰＥＮＡＮＡWKVpeJQEC1
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Link: https://www.penana.com/story/66244/%E7%A7%91%E6%99%AE%E5%B0%88%E6%AC%84-%E8%96%AF%E4%B8%8D%E6%8F%80%E5%96%AE/toc509Please respect copyright.ＰＥＮＡＮＡcfz7LBXtJt
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同時亦可以在Penana網站裡按「買一嚿/半嚿薯仔」，以課金的方式推動我繼續搜羅資料寫文，多謝。509Please respect copyright.ＰＥＮＡＮＡjw4ibuzypc
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Link:509Please respect copyright.ＰＥＮＡＮＡ1OQjZnoxcG
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio509Please respect copyright.ＰＥＮＡＮＡAxWU5bNjnU
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有興趣接收科學資訊的話，歡迎follow IG: potatopigtongue。509Please respect copyright.ＰＥＮＡＮＡzP6uCw90xH
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Ref1:https://www.pnas.org/content/early/2020/12/01/2004640117509Please respect copyright.ＰＥＮＡＮＡa1XVb2abJV

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真實影片:https://www.sciencemag.org/sites/default/files/120720-pandas.mp4509Please respect copyright.ＰＥＮＡＮＡ0chKnXLHtA
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