上一篇的深入淺出講述了人體的體味，緊接以來的這一篇將會講述一下大自然界的「體味」互動。1057Please respect copyright.ＰＥＮＡＮＡoXh26J7HRg
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https://www.penana.com/article/4687151057Please respect copyright.ＰＥＮＡＮＡqEk980ngJY
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適者生存，弱肉強食，一向被喻為大自然界的法則。1057Please respect copyright.ＰＥＮＡＮＡ3M9gULSlz2
植物作為食物鏈的最底層，大多時候也逃不過被食物鏈上層生物侵食的局面。1057Please respect copyright.ＰＥＮＡＮＡyOH7tCljkO
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圖1為毛蟲獵食樹葉的畫面，這棵植物並不是捕蠅草系列，看起上來的確沒有任何反擊或防禦的手段，任人魚肉。1057Please respect copyright.ＰＥＮＡＮＡfPr5Y8DKmC
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但實情其實並非如此。1057Please respect copyright.ＰＥＮＡＮＡtHpeiwZ2OC
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1057Please respect copyright.ＰＥＮＡＮＡdb02yKJMVG
圖2為椿象從後出現，反過來獵食毛蟲的畫面。然而，椿象的出現並不是偶然，而是植物暗中「召喚」而來的。1057Please respect copyright.ＰＥＮＡＮＡgPdJ4GQvbT
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圖3，當樹葉收到傷害的時候，它們會即時釋放出一堆統稱為 Green Leave Volatiles(GLV)的化合物（Ref1)，這個情況下，毛蟲的口水包含著一些物質，會將這些GLV化合物由Z形態轉化成為E形態；1057Please respect copyright.ＰＥＮＡＮＡcguplVX3C7
1057Please respect copyright.ＰＥＮＡＮＡz8AXqbZZLP
這物質究竟是甚麼，科學家暫時還沒清楚，只是知道該物質在高溫下便會失效。1057Please respect copyright.ＰＥＮＡＮＡF6N4YTBFjS
1057Please respect copyright.ＰＥＮＡＮＡ6kBJPxQorc
Z形態及E形態是化學用詞，用在描述化學物的形態。1057Please respect copyright.ＰＥＮＡＮＡadq3VCWk89
1057Please respect copyright.ＰＥＮＡＮＡ160jWOg9AD
強硬來說的話，Z形態就是用胡蘿蔔當作雙耳、樹枝當作雙手的雪人。1057Please respect copyright.ＰＥＮＡＮＡs1AWe46bke
而E形態就是用樹枝當作雙耳、胡蘿蔔當作雙手的雪人。1057Please respect copyright.ＰＥＮＡＮＡcuQjz1fe5H
1057Please respect copyright.ＰＥＮＡＮＡsArfD24cUu
大家所組成的元素均是一樣，但位置上卻有著不同的地方。1057Please respect copyright.ＰＥＮＡＮＡPjWD68dEP1
1057Please respect copyright.ＰＥＮＡＮＡtTTRt23OxE
我並沒有能力再以更深入淺出的方式解釋，有興趣的話可以自行Google。1057Please respect copyright.ＰＥＮＡＮＡSevQxUTAMb
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圖4）對於椿象來說， E形態的GLV是一種非常強大的吸引劑，亦因而被吸引前來，反咬毛蟲。1057Please respect copyright.ＰＥＮＡＮＡLhU16oHR8e
1057Please respect copyright.ＰＥＮＡＮＡdQdbI0iywf
所以整件事情的來龍去脈，就是毛蟲傷害樹葉的時候，其口水觸化樹葉裡頭的摔發性化學物轉變，其轉變的化合物吸引捕食毛蟲的獵人前來，因而「間接」地救了樹葉一命。1057Please respect copyright.ＰＥＮＡＮＡzMbLK9o9EW
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在這裡必須強調的是，這種關係是物種針對性的。1057Please respect copyright.ＰＥＮＡＮＡOD7U3c174c
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科學家在一篇學術文章（Ref1)證實，若果毛蟲品種並不是圖1列明的那一個品種，其口水是不會觸發樹葉化合物Z到E的轉變。1057Please respect copyright.ＰＥＮＡＮＡVcvGsBLAre
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植物是否會用不同的方式應付不同品種的入侵者，這暫時還是未知之數。1057Please respect copyright.ＰＥＮＡＮＡpetXmfICQm
但至少圖1-4的物種互動已有科學證據支持，由此已經可以看得出大自然物種之間的互動是絕非簡單的。1057Please respect copyright.ＰＥＮＡＮＡot0nJEHIhe
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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。1057Please respect copyright.ＰＥＮＡＮＡgAFjvIHHcN
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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/toc1057Please respect copyright.ＰＥＮＡＮＡ00g68NnBBK
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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。1057Please respect copyright.ＰＥＮＡＮＡXWoc4QYJKN
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Link:1057Please respect copyright.ＰＥＮＡＮＡGMuXZNkhX5
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio1057Please respect copyright.ＰＥＮＡＮＡjr12JG3XkJ
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有興趣接收科普資訊的話，歡迎follow IG: potatopigtongue。1057Please respect copyright.ＰＥＮＡＮＡeFJEeQ2oen
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Ref1:https://science.sciencemag.org/content/329/5995/10751057Please respect copyright.ＰＥＮＡＮＡjcxWQeuCdB
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