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。458Please respect copyright.PENANA6pG0rm1SFu458Please respect copyright.PENANAOPSlfaEPyf
458Please respect copyright.PENANAMM8DA00MqV
(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。458Please respect copyright.PENANAunqwqZ1SW1458Please respect copyright.PENANAJZckZLfeC8
458Please respect copyright.PENANABqu8VH27Rh
為何會塗糞上身,而且為何又如此揀擇呢?458Please respect copyright.PENANAX3Zc10v7Ci
458Please respect copyright.PENANAaqPZ1bR8pk
(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。458Please respect copyright.PENANAmkaKZzdkvZ458Please respect copyright.PENANA7eI3RsTuZE
458Please respect copyright.PENANAuh7CnMcrKN
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。458Please respect copyright.PENANAs8SjFjZXau
458Please respect copyright.PENANAB6bmO0h5f8
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。458Please respect copyright.PENANACR2qeICcSv
458Please respect copyright.PENANAN21REHtyPb
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。458Please respect copyright.PENANAsAWXnGOeaw
亦有可能的是,馬糞還有另外的功用尚未被揭曉出來。458Please respect copyright.PENANAasycaUadwN
458Please respect copyright.PENANAjYDe3gMDWb
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。458Please respect copyright.PENANAlkQ25nNEev
458Please respect copyright.PENANAEdQo8J5CUz
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/toc458Please respect copyright.PENANABeHUymUNCN
458Please respect copyright.PENANAOWlg9ZRorp
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。458Please respect copyright.PENANAs3QsulcOpH
458Please respect copyright.PENANAQEx4Ie3lMH
Link:458Please respect copyright.PENANAEmsrmc1wJC
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio458Please respect copyright.PENANA8cs2eCARxO
458Please respect copyright.PENANADDT3cchxYv
有興趣接收科學資訊的話,歡迎follow IG: potatopigtongue。458Please respect copyright.PENANAmk2nVEzUTS
458Please respect copyright.PENANAT0jryDkbZW
https://www.instagram.com/potatopigtongue/458Please respect copyright.PENANAL2fJ6ZM6qU
458Please respect copyright.PENANA1n3oSXSq3K
Ref1:https://www.pnas.org/content/early/2020/12/01/2004640117458Please respect copyright.PENANAKuJ3ipLTmU
458Please respect copyright.PENANAkIM8RnLpXn
458Please respect copyright.PENANAurmqG8vuXk
真實影片:https://www.sciencemag.org/sites/default/files/120720-pandas.mp4458Please respect copyright.PENANAdzgD8IzF5x
458Please respect copyright.PENANAOig6U7liBB