Plasticity of the Arabidopsis Root System under Nutrient Deficiencies
TLDR
A systematic comparison of RSA responses to nutrient deficiencies provides a comprehensive view of the overall changes in root plasticity induced by the deficiency of single nutrients and provides a solid basis for the identification of nutrient-sensitive steps in the root developmental program.Abstract:
Plant roots show a particularly high variation in their morphological response to different nutrient deficiencies. Although such changes often determine the nutrient efficiency or stress tolerance of plants, it is surprising that a comprehensive and comparative analysis of root morphological responses to different nutrient deficiencies has not yet been conducted. Since one reason for this is an inherent difficulty in obtaining nutrient-deficient conditions in agar culture, we first identified conditions appropriate for producing nutrient-deficient plants on agar plates. Based on a careful selection of agar specifically for each nutrient being considered, we grew Arabidopsis (Arabidopsis thaliana) plants at four levels of deficiency for 12 nutrients and quantified seven root traits. In combination with measurements of biomass and elemental concentrations, we observed that the nutritional status and type of nutrient determined the extent and type of changes in root system architecture (RSA). The independent regulation of individual root traits further pointed to a differential sensitivity of root tissues to nutrient limitations. To capture the variation in RSA under different nutrient supplies, we used principal component analysis and developed a root plasticity chart representing the overall modulations in RSA under a given treatment. This systematic comparison of RSA responses to nutrient deficiencies provides a comprehensive view of the overall changes in root plasticity induced by the deficiency of single nutrients and provides a solid basis for the identification of nutrient-sensitive steps in the root developmental program.read more
Citations
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Zn-fortified cereal grains in field-grown barley by enhanced root cytokinin breakdown
TL;DR: It is proposed that root enhancement achieved by increased degradation of cytokinin in roots can be a sustainable strategy to combat malnutrition caused by Zn deficiency.
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Wolfgang Zierer,Mohammad-Reza Hajirezaei,Kai Eggert,Norbert Sauer,Nicolaus von Wirén,Benjamin Pommerrenig +5 more
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Response of Root Growth and Development to Nitrogen and Potassium Deficiency as well as microRNA-Mediated Mechanism in Peanut (Arachis hypogaea L.)
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TL;DR: In this article, the root growth and development in response to nutrient deficiency in peanut (Arachis hypogaea L.) is still unclear, but the root responses to K deficiency were opposite to that of the N deficiency condition.
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Root architecture traits variation and nitrate-influx responses in diverse wheat genotypes under different external nitrogen concentrations.
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