Exogenous abscisic acid application decreases cadmium accumulation in Arabidopsis plants, which is associated with the inhibition of IRT1-mediated cadmium uptake.
Exogenous abscisic acid application decreases cadmium accumulation in Arabidopsis plants, which is associated with the inhibition of IRT1-mediated cadmium uptake.
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外源脱落酸的施用降低了拟南芥植物中镉的积累，这与抑制IRT1介导的镉吸收有关
DOI：
10.3389/fpls.2014.00721
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发表时间：
2014
影响因子：
5.6
通讯作者：
Jin CW
中科院分区：
文献类型：
--
作者：
Fan SK;Fang XZ;Guan MY;Ye YQ;Lin XY;Du ST;Jin CW
农业土壤镉污染是一个日益严重的问题。需要制定措施，尽量减少镉从受污染的土壤进入人类食物链。在Cd暴露条件下，低剂量（0.1 ~ 0.5 μM） ABA明显抑制了拟南芥野生型植株（Col-0）对Cd的吸收，降低了Cd水平。ABA处理也强烈抑制了IRT1在根中的表达。在ABA不敏感的双突变体snrk2.2/2.3中，Cd摄取的减少和IRT1表达的抑制明显低于Col-0。研究发现，在饲喂两种不同水平铁的Col-0植株根系中，aba降低Cd吸收与aba抑制IRT1表达相关。此外，irt1突变体对Cd的吸收几乎不受ABA的影响。这些结果表明，IRT1表达的抑制参与了外源ABA对Cd吸收的减少。有趣的是，ABA的应用增加了col0植株和irt1突变体的铁水平，这表明ABA增加铁获取并不依赖于irt1的功能，相反，ABA介导的irt1表达抑制可能是由于植物体内铁水平的升高。从我们的研究结果中，我们得出结论，ABA的应用可能会增加铁的获取，随后通过抑制IRT1活性降低Cd的摄取。因此，在镉污染土壤的作物生产中，开发基于ABA应用的技术可能是减少植物食用器官中镉积累的一条有前景的途径。
Cadmium (Cd) contamination of agricultural soils is an increasingly serious problem. Measures need to be developed to minimize Cd entering the human food chain from contaminated soils. We report here that, under Cd exposure condition, application with low doses of (0.1–0.5 μM) abscisic acid (ABA) clearly inhibited Cd uptake by roots and decreased Cd level in Arabidopsis wild-type plants (Col-0). Expression of IRT1 in roots was also strongly inhibited by ABA treatment. Decrease in Cd uptake and the inhibition of IRT1 expression were clearly lesser pronounced in an ABA-insensitive double mutant snrk2.2/2.3 than in the Col-0 in response to ABA application. The ABA-decreased Cd uptake was found to correlate with the ABA-inhibited IRT1 expression in the roots of Col-0 plants fed two different levels of iron. Furthermore, the Cd uptake of irt1 mutants was barely affected by ABA application. These results indicated that inhibition of IRT1 expression is involved in the decrease of Cd uptake in response to exogenous ABA application. Interestingly, ABA application increased the iron level in both Col-0 plants and irt1 mutants, suggesting that ABA-increased Fe acquisition does not depend on the IRT1 function, but on the contrary, the ABA-mediated inhibition of IRT1 expression may be due to the elevation of iron level in plants. From our results, we concluded that ABA application might increase iron acquisition, followed by the decrease in Cd uptake by inhibition of IRT1 activity. Thus, for crop production in Cd contaminated soils, developing techniques based on ABA application potentially is a promising approach for reducing Cd accumulation in edible organs in plants.
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一种模拟 ABA 的配体，可减少水分流失并促进植物的抗旱性
影响因子：
44.1
作者：
通讯作者：
--
影响因子：
11.4
作者：
Muehe, E. Marie;Adaktylou, Irini J.;Kappler, Andreas
通讯作者：
Kappler, Andreas
影响因子：
4.9
作者：
Nishida, Sho;Tsuzuki, Chisato;Mizuno, Takafumi
通讯作者：
Mizuno, Takafumi
影响因子：
7.4
作者：
Besson-Bard, Angelique;Gravot, Antoine;Wendehenne, David
通讯作者：
Wendehenne, David
抑制硝酸盐转运蛋白 1.1 控制的硝酸盐吸收可减少拟南芥中的镉吸收
影响因子：
7.4
作者：
Mao, Qian Qian;Guan, Mei Yan;Jin, Chong Wei
通讯作者：
Jin, Chong Wei