植物雖無法躲避昆蟲的侵襲,但也並非是任蟲魚肉的存在。359Please respect copyright.PENANARfixFU3Gjx359Please respect copyright.PENANAsqWfSqizXK
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它們對抗外敵的其中一道方式,就是在葉子中製造一些對昆蟲有毒的化學物。359Please respect copyright.PENANAdcuDFWaOZa
如果對方膽敢吃掉自己的話,下場就只有死路一條。359Please respect copyright.PENANA2qL7PhUycw
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(圖2)圖中紅色結構的是葉子其中一種專用作對付昆蟲的有毒化學物(對人類及大部份動物無害),而植物自身攜帶著一隻名為BtPMaT1的蛋白酶,它能夠將有毒的化學物改造成為無害化學物,相信是為了避免對付害蟲的時候會不慎毒害自己而設。359Please respect copyright.PENANAHo2fKeDtvQ359Please respect copyright.PENANAd2AimxPsw4
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換句話說,植物有著製作毒藥能力的同時,亦可製作相應的解藥自保。359Please respect copyright.PENANAHtZgN2OPyK
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(圖3)然而,害蟲可不是吃素的(雖然的確是在吃素),有科學家發現有部份害蟲身上竟然發展出跟植物一模一樣的BtPMaT1基因,相信是透過進食葉子時從中將該基因鑴在自己的基因圖譜裡頭,從而發展出對抗有毒化學物的方法。359Please respect copyright.PENANAM8SZJhUZ5A359Please respect copyright.PENANARmo6SHTRLZ
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現在有不少科學家正在研究箇中的機制,若然能成功拆解箇中的秘密,分分中可以反其道而行,將只對害蟲有毒的基因注入在植物裡頭,讓害蟲們偷取後自取滅亡。359Please respect copyright.PENANA1YXtJooXBy
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Ref1:https://www.cell.com/cell/fulltext/S0092-8674(21)00164-1359Please respect copyright.PENANAu9MsxhQAIx