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How do plants respond to nutrient shortage by biomass allocation?

机译:植物如何通过生物量分配来应对养分短缺?

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Plants constantly sense the changes in their environment; when mineral elements are scarce, they often allocate a greater proportion of their biomass to the root system. This acclimatory response is a consequence of metabolic changes in the shoot and an adjustment of carbohydrate transport to the root. It has long been known that deficiencies of essential macronutrients (nitrogen, phosphorus, potassium and magnesium) result in an accumulation of carbohydrates in leaves and roots, and modify the shoot-to-root biomass ratio. Here, we present an update on the effects of mineral deficiencies on the expression of genes involved in primary metabolism in the shoot, the evidence for increased carbohydrate concentrations and altered biomass allocation between shoot and root, and the consequences of these changes on the growth and morphology of the plant root system.
机译:植物不断地感知环境的变化。当矿物元素稀缺时,它们通常将更大比例的生物量分配给根系。这种适应性反应是芽中新陈代谢变化和碳水化合物向根部转运的调节的结果。早就知道,必需的大量营养素(氮,磷,钾和镁)的缺乏会导致叶和根中碳水化合物的积累,并会改变地上部与根部的生物量比。在这里,我们介绍了矿物质缺乏对枝条中初级代谢所涉及的基因表达的影响的最新动态,碳水化合物浓度增加和枝条与根之间生物量分配发生变化的证据,以及这些变化对生长和生长的影响。植物根系的形态。

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