The effect of silicon on the kinetics of rice root iron plaque formation
The effect of silicon on the kinetics of rice root iron plaque formation
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DOI：
10.1007/s11104-022-05414-4
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发表时间：
2022-04-19
期刊：
影响因子：
4.9
通讯作者：
Seyfferth，Angelia L.
中科院分区：
文献类型：
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作者：
Limmer，Matt A.;Thomas，John;Seyfferth，Angelia L.
水生植物（包括水稻）由于径向氧损失（ROL），在其根部形成铁（Fe）斑块，这些斑块积累有益和有毒元素。硅是水稻生长的重要营养元素，硅在水稻铁膜中积累并影响水稻的可溶性固形物。这些斑块如何形成随着时间的推移，以及硅如何影响这一进程仍不清楚。MethodsRice生长在一个盆栽研究与4个水平的添加硅。根铁菌斑的形成每周监测乙烯基薄膜之间的盆和土壤。植物生长到成熟，然后再生，也检查形成的Fe斑块在再生cropp. ResultsFe斑块形成指数增加，在营养生长期，在孕穗期达到峰值，然后呈指数下降-重复的模式，在再生作物。虽然最高的硅处理导致的早期发病的铁斑块形成，增加硅减少了铁斑块在收获时的量，导致在一个最小的净effect.ConclusionsThe动力学的铁斑块形成依赖于水稻生长阶段，这可能会影响是否铁斑块是一个源或汇的元素，如磷和砷。
PurposeAquatic plants, including rice, develop iron (Fe) plaques on their roots due to radial oxygen loss (ROL), and these plaques accumulate both beneficial and toxic elements. Silicon is an important nutrient for rice and both accumulates in Fe plaque and can affect ROL. How these plaques form over time and how Si affects this process remains unclear.MethodsRice was grown in a pot study with 4 levels of added Si. Root Fe plaque formation was monitored weekly using vinyl films placed between the pot and soil. Plants were grown to maturity and then ratooned to also examine the formation of Fe plaque during the ratoon crop.ResultsIron plaque formation increased exponentially during the vegetative phase, peaked at the booting phase, then decreased exponentially – a pattern that repeated in the ratoon crop. While the highest Si treatment led to an earlier onset of Fe plaque formation, increasing Si decreased the amount of Fe plaque at harvest, resulting in a minimal net effect.ConclusionsThe kinetics of Fe plaque formation are dependent on rice growth stage, which may affect whether the Fe plaque is a source or sink of elements such as phosphorous and arsenic.