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Sci Total Environ：NMT驗證鋁毒削弱景天鎘?積累能力
NMT作為生命科學底層核心技術，是建立活體創新科研平臺的*技術。2005年~2020年，NMT已扎根中國15年。2020年，中國NMT銷往瑞士蘇黎世大學，正式打開歐洲市場。
研究使用平臺：NMT重金屬創新科研平臺
期刊：Science of the Total Environment
主題：NMT驗證鋁毒削弱景天鎘積累能力
標題：Aluminum toxicity decreases the phytoextraction capability by cadmium/zinc hyperaccumulator Sedum plumbizincicola in acid soils
影響因子：5.589
檢測指標：Cd2+流速
檢測樣品：伴礦景天
Cd2+流實驗處理方法：
伴礦景天幼苗在Al濃度為0、200、400μM，pH4的環境下處理2、12、24、48、72小時
Cd2+流實驗測試液成份：
50 μM CdCl2, 0.1 mM CaCl2, MgCl2 and KCl, 1.0 mM NaCl, pH 4.00
作者：中科院南京土壤所吳龍華、李柱、周嘉文
中文摘要（谷歌機翻）
在酸性土壤中過量的鋁（Al）或在重復的植物提取過程中由于酸化而釋放的Al可能會損害超級蓄積劑的植物提取效率，但這通常被忽略。
在這里，我們*在長期（7周）和短期（72小時）以及土壤條件下，通過水培試驗研究了Al對鎘（Cd）和鋅（Zn）超積累性景天（Sedum plumbizincicola）的毒性。鍋實驗。在長期的水培試驗中，即使在pH值為5.00的<100μMAl下（可溶性Al：8.74μM），也發現Al的可觀察到的毒性作用，與無Al處理相比，它能降低芽Cd吸收39.3％。
非損傷微測技術顯示，在48小時后用200μMAl在pH 4.00條件下處理后，根Cd2 +的流入被顯著抑制。盆栽實驗證實，Al毒性可抑制酸性土壤中植物的生長和金屬吸收，可交換的Al為0.33 cmolc kg-1。Al脅迫引起的根部表面Cd吸附的減少可能是導致枝條Cd吸收減少的重要因素。
對金屬化學形態的分析表明，鋁的添加顯著影響莖中Cd和Zn的化學形態，使它們的活動性降低，從而限制了Cd和Zn的轉運。
在酸性土壤中和在反復的植物提取過程中，土壤中可能發生的鋁毒害是限制使用超級蓄積劑從污染土壤中去除金屬的效率的主要因素。
Net fluxes of Cd2+ at the root surface S. plumbizincicola under Al exposure in the short term. The error bars are SE, n = 8. Different letters indicate significant differences under different Al treatments at the same exposure time at P < 0.05.
英文摘要
Excessive aluminum (Al) in acid soils or Al released due to acidification during repeated phytoextraction might impair the phytoextraction efficiency of hyperaccumulators but this is often neglected.
Here, we investigate for the first time the toxicity of Al to the cadmium (Cd) and zinc (Zn) hyperaccumulator Sedum plumbizincicola with hydroponics experiments both in the long (7 weeks) and short terms (72 hours), and in soil conditions in a pot experiment. In the long-term hydroponics experiment, observable toxic effects of Al were found even at < 100 μM Al at pH 5.00 (soluble Al: 8.74 μM) which lowered shoot Cd uptake by 39.3% compared with the Al-free treatment.
Non-invasive Micro-test Technology shows that root Cd2+ influx was significantly inhibited after treatment with 200 μM Al at pH 4.00 after 48 hours. The pot experiment confirms that Al toxicity induced inhibition of plant growth and metal uptake in the acid soil with an exchangeable Al of 0.33 cmolc kg−1. Decreasing Cd adsorption at root surfaces induced by Al stress may be an important factor in declining shoot Cd uptake.
Analysis of the chemical forms of metals shows that Al addition significantly influenced the chemical forms of Cd and Zn in stems, made them restrained Cd and Zn translocation.
Aluminum toxicity that potentially occurs in acid soils and in soils during repeated phytoextraction would be a primary factor limiting metal removal efficiency from contaminated soils using hyperaccumulators.