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首页> 外文期刊>Frontiers in Plant Science >Iron and Phosphate Deficiency Regulators Concertedly Control Coumarin Profiles in Arabidopsis thaliana Roots During Iron, Phosphate, and Combined Deficiencies
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Iron and Phosphate Deficiency Regulators Concertedly Control Coumarin Profiles in Arabidopsis thaliana Roots During Iron, Phosphate, and Combined Deficiencies

机译：铁和磷酸盐缺乏调节剂可协调控制铁，磷酸盐和联合缺乏症中拟南芥根的香豆素谱

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Plants face varying nutrient conditions, to which they have to adapt to. Adaptive responses are nutrient-specific and strategies to ensure supply and homeostasis for one nutrient might be opposite to another one, as shown for phosphate (P _(i)) and iron (Fe) deficiency responses, where many genes are regulated in an opposing manner. This was also observed on the metabolite levels. Whereas root and exudate levels of catechol-type coumarins, phenylpropanoid-derived 2-benzopyranones, which facilitate Fe acquisition, are elevated after Fe deficiency, they are decreased after P _(i) deficiency. Exposing plants to combined P _(i) and Fe deficiency showed that the generation of coumarin profiles in Arabidopsis thaliana roots by P _(i) deficiency considerably depends on the availability of Fe. Similarly, the effect of Fe deficiency on coumarin profiles is different at low compared to high P _(i) availability. These findings suggest a fine-tuning of coumarin profiles, which depends on Fe and P _(i) availability. T-DNA insertion lines exhibiting aberrant expression of genes involved in the regulation of P _(i) starvation responses ( PHO1, PHR1, bHLH32, PHL1, SPX1 ) and Fe starvation responses ( BRUTUS, PYE, bHLH104, FIT ) were used to analyze the regulation of the generation of coumarin profiles in Arabidopsis thaliana roots by P _(i), Fe, and combined P _(i) and Fe deficiency. The analysis revealed a role of several Fe-deficiency response regulators in the regulation of Fe and of P _(i) deficiency-induced coumarin profiles as well as for P _(i) deficiency response regulators in the regulation of P _(i) and of Fe deficiency-induced coumarin profiles. Additionally, the regulation of Fe deficiency-induced coumarin profiles by Fe deficiency response regulators is influenced by P _(i) availability. Conversely, regulation of P _(i) deficiency-induced coumarin profiles by P _(i) deficiency response regulators is modified by Fe availability.
机译：植物必须适应不同的营养条件。适应性反应是特定于营养物的，并且确保一种营养物的供应和体内平衡的策略可能与另一种营养物相反，如磷酸盐（P _（i））和铁（Fe）缺乏反应所示，其中许多基因在相反的基因中受到调节方式。在代谢物水平上也观察到了这一点。缺铁后儿茶酚型香豆素，苯丙氨酸衍生的2-苯并吡喃酮的根和分泌液水平升高，这些元素促进了Fe的吸收，而在P _（i）缺乏后则降低了。将植物暴露于复合的P_（i）和Fe缺乏下表明，P_（i）缺乏在拟南芥根中香豆素谱的生成很大程度上取决于Fe的可用性。同样，铁缺乏对香豆素曲线的影响与高P _（i）可用性相比低时不同。这些发现表明，香豆素的特性可以进行微调，这取决于Fe和P _（i）的可用性。 T-DNA插入系表现出异常表达的基因参与调控P_（i）饥饿反应（PHO1，PHR1，bHLH32，PHL1，SPX1）和铁饥饿反应（BRUTUS，PYE，bHLH104，FIT） P_（i），Fe以及P_（i）和Fe缺乏联合对拟南芥根中香豆素谱的产生的调节。分析揭示了几种铁缺乏反应调节剂在调节Fe和P _（i）缺乏引起的香豆素谱中的作用以及P _（i）缺乏反应调节剂在P _（i）调节中的作用和铁缺乏引起的香豆素特征。另外，铁缺乏反应调节剂对铁缺乏诱导的香豆素谱的调节受P_（i）可用性的影响。相反，P_（i）缺乏反应调节剂对P_（i）缺乏诱导的香豆素谱的调节被Fe的有效性所修饰。

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