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。279Please respect copyright.PENANAMEAnSI1YyW
279Please respect copyright.PENANAcJ45yBAn9L
279Please respect copyright.PENANAQlhmzpcnc4
(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。279Please respect copyright.PENANAtUgFH0j78Y
279Please respect copyright.PENANAMF1Sq1KXZd
279Please respect copyright.PENANAJO7t4Cz0g5
為何會塗糞上身,而且為何又如此揀擇呢?279Please respect copyright.PENANAnPEUZ45uoW
279Please respect copyright.PENANAeIG6gytONu
(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。279Please respect copyright.PENANAV7vcIwgQms
279Please respect copyright.PENANAvCK2X7cHeu
279Please respect copyright.PENANA4ihbt4HseA
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。279Please respect copyright.PENANAecjAJc4ekA
279Please respect copyright.PENANAWkwdgvgAUT
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。279Please respect copyright.PENANAfJGEVtJ0b9
279Please respect copyright.PENANAPAP4JH154L
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。279Please respect copyright.PENANAZLClXFfU8t
亦有可能的是,馬糞還有另外的功用尚未被揭曉出來。279Please respect copyright.PENANAIEVbFhhjg8
279Please respect copyright.PENANAnDUjFPx2dv
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。279Please respect copyright.PENANAJg1vn6cMNN
279Please respect copyright.PENANAhP9WDRSbSf
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/toc279Please respect copyright.PENANAC9erMaxcaY
279Please respect copyright.PENANAo4xtDdcldV
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。279Please respect copyright.PENANAcUOqoPnOn9
279Please respect copyright.PENANAtdcDcnis5f
Link:279Please respect copyright.PENANA7eNJGrXsHI
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio279Please respect copyright.PENANAZPBZUT3Yjy
279Please respect copyright.PENANAPF9vf9waY8
有興趣接收科學資訊的話,歡迎follow IG: potatopigtongue。279Please respect copyright.PENANAIOytXkIVjN
279Please respect copyright.PENANAHC3UAacKEG
https://www.instagram.com/potatopigtongue/279Please respect copyright.PENANAnRRaRTw8zU
279Please respect copyright.PENANAPt5bhNoKlJ
Ref1:https://www.pnas.org/content/early/2020/12/01/2004640117279Please respect copyright.PENANA3HvE5nQgIh
279Please respect copyright.PENANAFMIqA9iAyy
279Please respect copyright.PENANAOmyEXv2EQS
真實影片:https://www.sciencemag.org/sites/default/files/120720-pandas.mp4279Please respect copyright.PENANAhTX0WUAv71
279Please respect copyright.PENANAopX7iD0Dpn