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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SMAX1/SMXL2 regulate root and root hair development downstream of KAI2-mediated signalling in Arabidopsis.
José Antonio Villaécija-Aguilar,Maxime Hamon-Josse,Samy Carbonnel,Samy Carbonnel,Annika Kretschmar,Christian Schmidt,Corinna Dawid,Tom Bennett,Tom Bennett,Caroline Gutjahr,Caroline Gutjahr +10 more
TL;DR: The results demonstrate that the KAI2 signalling pathway is an important new regulator of root hair and root development in Arabidopsis and lay an important basis for research into a molecular understanding of how very similar and partially overlapping hormone signalling pathways regulate different phenotypic outputs.
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Natural variation of BSK3 tunes brassinosteroid signaling to regulate root foraging under low nitrogen.
Zhongtao Jia,Ricardo Fabiano Hettwer Giehl,Rhonda C. Meyer,Thomas Altmann,Nicolaus von Wirén +4 more
TL;DR: Natural variation in this response among Arabidopsis accessions depends on the brassinosteroid (BR) signaling kinase BSK3, which can enhance BR sensitivity and root growth, which provides targets for improving root growth of crops growing under limited N conditions.
Journal ArticleDOI
Phenotypic plasticity of the maize root system in response to heterogeneous nitrogen availability
TL;DR: Information will inform breeding strategies for root traits enabling more efficient acquisition of soil resources and synchronizing crop growth demand, root resource acquisition and fertilizer application during crop growing season, thereby maximizing crop yields and nutrient-use efficiency and minimizing environmental pollution.
Journal ArticleDOI
D-Root: a system for cultivating plants with the roots in darkness or under different light conditions
Javier Silva-Navas,Miguel A. Moreno-Risueno,Concepción Manzano,Mercedes Pallero-Baena,Sara Navarro-Neila,Bárbara Téllez-Robledo,José María García-Mina,Roberto Baigorri,F. J. Gallego,Juan Carlos del Pozo +9 more
TL;DR: D-Root provides a growing system closer to the natural one for assaying Arabidopsis plants, and therefore its use will contribute to a better understanding of the mechanisms involved in root development, hormonal signaling and stress responses.
Journal ArticleDOI
Integration of responses within and across Arabidopsis natural accessions uncovers loci controlling root systems architecture
Ulises Rosas,Angélica Cibrián-Jaramillo,Angélica Cibrián-Jaramillo,Daniela Ristova,Joshua A. Banta,Joshua A. Banta,Miriam L. Gifford,Miriam L. Gifford,Angela Huihui Fan,Royce W. Zhou,Grace Kim,Gabriel Krouk,Gabriel Krouk,Kenneth D. Birnbaum,Michael D. Purugganan,Gloria M. Coruzzi +15 more
TL;DR: It is revealed that the root plasticity of a single Arabidopsis accession exposed to distinct environments broadly recapitulates the natural variation “space,” which supports a role for plasticity responses in phenotypic evolution in natural environments.
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