Iron uptake system mediates nitrate-facilitated cadmium accumulation in tomato (Solanum lycopersicum) plants.
Iron uptake system mediates nitrate-facilitated cadmium accumulation in tomato (Solanum lycopersicum) plants.
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铁吸收系统介导番茄（Solanum lycopersicum）植物中硝酸盐促进的镉积累
DOI：
10.1093/jxb/ers036
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发表时间：
2012-05
影响因子：
6.9
通讯作者：
Jin CW
中科院分区：
文献类型：
--
作者：
Luo BF;Du ST;Lu KX;Liu WJ;Lin XY;Jin CW
氮素管理是减少作物镉污染的一项重要农艺措施。然而，目前还不清楚氮如何影响植物吸收镉。以番茄（Solanum lycopersicum）野生型和铁吸收效率低下突变体（T3238 fer）为材料，采用pH缓冲溶液培养法，研究了氮素形态对镉吸收的直接影响。野生型植物喂养NO3−积累更多的镉比植物喂养NH 4+。铁的吸收和LeIRT 1在根中的表达也更大的植物喂养NO3−。然而，在失去FER功能的突变体T3238 fer中，LeIRT 1在根中的表达几乎完全终止，NO3−和NH 4+处理之间的差异消失。结果表明，N-型对该突变体的Cd吸收没有影响。此外，抑制LeIRT 1表达的NO合成抑制与钨酸盐或L-NAME，也大大抑制了镉的吸收在根中，N-型处理之间的差异减小。考虑到所有这些发现，可以得出结论，铁吸收系统的上调是负责NO3−促进镉在植物中的积累。
Nitrogen (N) management is a promising agronomic strategy to minimize cadmium (Cd) contamination in crops. However, it is unclear how N affects Cd uptake by plants. Wild-type and iron uptake-inefficient tomato (Solanum lycopersicum) mutant (T3238fer) plants were grown in pH-buffered hydroponic culture to investigate the direct effect of N-form on Cd uptake. Wild-type plants fed NO3− accumulated more Cd than plants fed NH4+. Iron uptake and LeIRT1 expression in roots were also greater in plants fed NO3−. However, in mutant T3238fer which loses FER function, LeIRT1 expression in roots was almost completely terminated, and the difference between NO3− and NH4+ treatments vanished. As a result, the N-form had no effect on Cd uptake in this mutant. Furthermore, suppression of LeIRT1 expression by NO synthesis inhibition with either tungstate or L-NAME, also substantially inhibited Cd uptake in roots, and the difference between N-form treatments was diminished. Considering all of these findings, it was concluded that the up-regulation of the Fe uptake system was responsible for NO3− -facilitated Cd accumulation in plants.
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影响因子：
4.8
作者：
Bereczky, Z;Wang, HY;Bauer, P
通讯作者：
Bauer, P
DOI：
10.1073/pnas.212448699
发表时间：
2002-10-15
影响因子：
11.1
作者：
Ling, HQ;Bauer, P;Ganal, M
通讯作者：
Ganal, M
NO 合成酶产生的 NO 作用于生长素下游，调节缺铁诱导的根分枝，从而增强番茄植株的缺铁耐受性
影响因子：
6.9
作者：
Jin CW;Du ST;Shamsi IH;Luo BF;Lin XY
通讯作者：
Lin XY
影响因子：
7.4
作者：
Besson-Bard, Angelique;Gravot, Antoine;Wendehenne, David
通讯作者：
Wendehenne, David
影响因子：
2.9
作者：
ERIKSSON, JE
通讯作者：
ERIKSSON, JE