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。481Please respect copyright.ＰＥＮＡＮＡEzF48VovFl
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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。481Please respect copyright.ＰＥＮＡＮＡU4PyMClsRs
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為何會塗糞上身，而且為何又如此揀擇呢？481Please respect copyright.ＰＥＮＡＮＡ48mP8zc3TO
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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。481Please respect copyright.ＰＥＮＡＮＡmvaWgmVz98
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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。481Please respect copyright.ＰＥＮＡＮＡQQi1j6GfqJ
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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。481Please respect copyright.ＰＥＮＡＮＡVJLRfMGGH1
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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。481Please respect copyright.ＰＥＮＡＮＡTKgIBPqnNa
亦有可能的是，馬糞還有另外的功用尚未被揭曉出來。481Please respect copyright.ＰＥＮＡＮＡwHltuaeD7s
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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。481Please respect copyright.ＰＥＮＡＮＡqdJgYFgtul
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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/toc481Please respect copyright.ＰＥＮＡＮＡKKwTeuMA02
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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。481Please respect copyright.ＰＥＮＡＮＡeb4yDEi5Av
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Link:481Please respect copyright.ＰＥＮＡＮＡwzMIuOUJsv
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio481Please respect copyright.ＰＥＮＡＮＡt5hBB3ULh3
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有興趣接收科學資訊的話，歡迎follow IG: potatopigtongue。481Please respect copyright.ＰＥＮＡＮＡUmUufsu4UD
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https://www.instagram.com/potatopigtongue/481Please respect copyright.ＰＥＮＡＮＡucbdS5rskb
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Ref1:https://www.pnas.org/content/early/2020/12/01/2004640117481Please respect copyright.ＰＥＮＡＮＡiSKLYibLIm

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真實影片:https://www.sciencemag.org/sites/default/files/120720-pandas.mp4481Please respect copyright.ＰＥＮＡＮＡCYs8c3yCDX
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