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。507Please respect copyright.PENANAAaDOEwGUwJ507Please respect copyright.PENANAChuq3wlr75
507Please respect copyright.PENANAKbSBEHMFq9
(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。507Please respect copyright.PENANA5O1vd98Thx507Please respect copyright.PENANA3BFvwJQ0jE
507Please respect copyright.PENANANb6aH2iIxR
為何會塗糞上身,而且為何又如此揀擇呢?507Please respect copyright.PENANA9ry3cNITVE
507Please respect copyright.PENANAEposMkERuu
(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。507Please respect copyright.PENANAT9YrXa7IXH507Please respect copyright.PENANAQgg0W2H2zA
507Please respect copyright.PENANAGGlbmckgnb
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。507Please respect copyright.PENANABrT8b3JTXM
507Please respect copyright.PENANAzyeNqpFN2i
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。507Please respect copyright.PENANATf7zluNcrk
507Please respect copyright.PENANAQKo9m431hs
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。507Please respect copyright.PENANAgXORYa61Kt
亦有可能的是,馬糞還有另外的功用尚未被揭曉出來。507Please respect copyright.PENANAP6LBDHlsfI
507Please respect copyright.PENANA0db7CkHxH4
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。507Please respect copyright.PENANA4nstt43IY8
507Please respect copyright.PENANAS6fTjG68eA
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/toc507Please respect copyright.PENANABz4HGWYzqE
507Please respect copyright.PENANALXEedhct2p
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。507Please respect copyright.PENANAvsq0jjpW8R
507Please respect copyright.PENANAd4D4ZyDACK
Link:507Please respect copyright.PENANAsCJoLwDEeM
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio507Please respect copyright.PENANAVjfLvoTuqU
507Please respect copyright.PENANALPJDMGO2F3
有興趣接收科學資訊的話,歡迎follow IG: potatopigtongue。507Please respect copyright.PENANAI3jW1hMQOh
507Please respect copyright.PENANAcLVEpdN93k
https://www.instagram.com/potatopigtongue/507Please respect copyright.PENANAlqxDbZtJkW
507Please respect copyright.PENANA0x0ClFKtFP
Ref1:https://www.pnas.org/content/early/2020/12/01/2004640117507Please respect copyright.PENANALqk6ssjTSl
507Please respect copyright.PENANAMx7uZqyxQw
507Please respect copyright.PENANAX1b0HjF4Pp
真實影片:https://www.sciencemag.org/sites/default/files/120720-pandas.mp4507Please respect copyright.PENANAHLHtuFjA8W
507Please respect copyright.PENANAoCDpl9Bpe1