發(fā)布時(shí)間：2018-06-20 14:36

  本文選題：稀土元素 + 酸雨　； 參考：《稀土》2017年01期

【摘要】：稀土元素累積與酸雨同時(shí)出現(xiàn)在許多農(nóng)業(yè)區(qū),成為一個(gè)新的環(huán)境問(wèn)題。然而,關(guān)于該同時(shí)脅迫的作用機(jī)制并不清楚。采用電感耦合等離子體質(zhì)譜、掃描電鏡-能譜儀及透射電鏡調(diào)查L(zhǎng)a(Ⅲ)與酸雨(單一及同時(shí))脅迫下辣根根系體內(nèi)La含量,胞內(nèi)La水平及細(xì)胞結(jié)構(gòu)變化。實(shí)驗(yàn)結(jié)果顯示,La(Ⅲ)與酸雨同時(shí)脅迫使辣根根系La含量和胞內(nèi)La含量增加(20 mg·L~(-1)La(Ⅲ)和pH 4.5酸雨同時(shí)脅迫組除外),增幅隨La(Ⅲ)濃度和酸雨強(qiáng)度增加而增大;低濃度(20 mg·L~(-1))La(Ⅲ)可緩解pH 4.5酸雨對(duì)根細(xì)胞結(jié)構(gòu)的負(fù)作用,而高濃度La(Ⅲ)與酸雨同時(shí)脅迫對(duì)根細(xì)胞結(jié)構(gòu)呈現(xiàn)協(xié)同效應(yīng)。La(Ⅲ)在根系的累積對(duì)根細(xì)胞結(jié)構(gòu)起到重要的調(diào)控作用,該作用與La(Ⅲ)濃度、酸雨強(qiáng)度和脅迫方式(單一或同時(shí)脅迫)密切相關(guān)。
[Abstract]:The accumulation of rare earth elements and acid rain have become a new environmental problem in many agricultural areas. However, the mechanism of the simultaneous stress is not clear. Inductively coupled plasma mass spectrometry (ICP-MS), scanning electron microscopy (SEM) and transmission electron microscopy (TEM) were used to investigate the changes of La content, intracellular La level and cell structure in horseradish root system under the stress of La (鈪，

本文編號(hào)：2044599