過度開採環境，最終受害的只會是人類自己。824Please respect copyright.ＰＥＮＡＮＡrFS8MxSNg1
824Please respect copyright.ＰＥＮＡＮＡqWG9I6rVQb
（圖1）19世紀，日本三井金屬礦業的神岡礦山過度開採，排出的重金屬累積在泥土裡頭，導致河旁的稻田穀物受到鎘(Cadmium)重金屬污染。824Please respect copyright.ＰＥＮＡＮＡtLRm6CvVAP
824Please respect copyright.ＰＥＮＡＮＡSMwAneorYS
824Please respect copyright.ＰＥＮＡＮＡ4G7GW14twN
不知情的居民長期服用鎘污染的稻米，骨骼逐漸變得鬆脆，腎臟亦受到嚴重傷害。824Please respect copyright.ＰＥＮＡＮＡbsltt3p7zi
最終日本醫生成功證實得到病因來自攝取過量的重金屬鎘，並把患者經常呻痛的病徵命名為痛痛病(Itai-itai disease)。824Please respect copyright.ＰＥＮＡＮＡvYHcKFeflA
824Please respect copyright.ＰＥＮＡＮＡFHtdrkyRz5
而稻米的鎘含度自此受到重視，世衛WHO更將大麥的鎘上限設為0.1mg kg−1，亦即是每一公斤大麥只可有一微克鎘。824Please respect copyright.ＰＥＮＡＮＡOr4TF1aXgL
824Please respect copyright.ＰＥＮＡＮＡYQC5cw7MUS
824Please respect copyright.ＰＥＮＡＮＡLY8tQglQGx
（圖2）一直以來，科學家已找出不少穀物吸取或代謝重金屬的基因，把穀物改造，盡量減低重金屬累積在穀物的程度。824Please respect copyright.ＰＥＮＡＮＡBHYvIXiZ3t
824Please respect copyright.ＰＥＮＡＮＡ841yeUEOzp
824Please respect copyright.ＰＥＮＡＮＡKQigMaCXlY
近日有科學家比較世界100款大麥的鎘數量(Ref1)，發現日本一款Haruna Nijo大麥的鎘含量最高(0.04mg kg−1），而阿富汗BCS318大麥款式則為最低(0.01mg kg−1）。824Please respect copyright.ＰＥＮＡＮＡQkTt8Pna93
824Please respect copyright.ＰＥＮＡＮＡyDHEdXjbMY
（圖3）一輪比較過後，科學家證實阿富汗大麥的HvHMA3蛋白質數量比較多，為大麥減少吸收泥土鎘金屬的主因。824Please respect copyright.ＰＥＮＡＮＡtvpqfk1VeU
824Please respect copyright.ＰＥＮＡＮＡsnDbaAsI0e
824Please respect copyright.ＰＥＮＡＮＡRlrFGre83t
最後證實，歸根原因是一段特定的基因安插在HvHMA3蛋白質基因的前頭，催促HvHMA3蛋白質的產生。824Please respect copyright.ＰＥＮＡＮＡVPY3ycDdA5
824Please respect copyright.ＰＥＮＡＮＡPvLPlWUxM7
科學家後來再找尋另外334款大麥，發覺有54種同樣被安插在同樣位置，而那54款品種又的確是含有較少的鎘金屬數量。824Please respect copyright.ＰＥＮＡＮＡqpsn5t1yQv
824Please respect copyright.ＰＥＮＡＮＡaB1awemtqD
824Please respect copyright.ＰＥＮＡＮＡLqzutF2PFZ
最後，科學家把那段基因插在日本Haruna Nijo大麥的適當位置上，同樣亦能將鎘金屬數量減至與阿富汗品種相同，而產量及其他各種礦物質的含量並沒有任何的大改變。824Please respect copyright.ＰＥＮＡＮＡRWp1qKHuNm
824Please respect copyright.ＰＥＮＡＮＡogjBI95onl
此基因的排序及位置已公開在資料庫上，好讓各種基因學家或相關人士可作參考盡量減低日後穀物的鎘金屬數量。824Please respect copyright.ＰＥＮＡＮＡKsf9H9OGFg
824Please respect copyright.ＰＥＮＡＮＡt47i58Le0l
824Please respect copyright.ＰＥＮＡＮＡh9e81ufDXs
824Please respect copyright.ＰＥＮＡＮＡzE2HWJYckD
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。824Please respect copyright.ＰＥＮＡＮＡhYgbMONVfW
824Please respect copyright.ＰＥＮＡＮＡg3y45Lab4O
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/toc824Please respect copyright.ＰＥＮＡＮＡhl3zC6F950
824Please respect copyright.ＰＥＮＡＮＡvLFu1EUaP1
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。824Please respect copyright.ＰＥＮＡＮＡTgkoplWNl9
824Please respect copyright.ＰＥＮＡＮＡiair1Uqrir
Link:824Please respect copyright.ＰＥＮＡＮＡloKhBxRdhF
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio824Please respect copyright.ＰＥＮＡＮＡB6FvSsuXOl
824Please respect copyright.ＰＥＮＡＮＡ95MG62hS7y
824Please respect copyright.ＰＥＮＡＮＡGsCSNdxFIQ
有興趣接收科普資訊的話，歡迎follow IG: potatopigtongue。824Please respect copyright.ＰＥＮＡＮＡuIlfPIb1S9
824Please respect copyright.ＰＥＮＡＮＡrqVRkJ3ZiB
Ref1:https://www.nature.com/articles/s43016-020-0130-x824Please respect copyright.ＰＥＮＡＮＡq5APODbmFE
Penana
search
登入arrow_drop_down
註冊arrow_drop_down
