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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The divining root: moisture-driven responses of roots at the micro- and macro-scale
TL;DR: This review will explore how roots respond to water availability with an emphasis on what is currently known at different spatial scales, and speculation that micro-scale responses are necessary for optimal functionality of the root system in a heterogeneous moisture environment.
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Combinatorial interaction network of transcriptomic and phenotypic responses to nitrogen and hormones in the Arabidopsis thaliana root
Daniela Ristova,Daniela Ristova,Clément Carré,Marjorie Pervent,Anna Medici,Grace Kim,Domenica Scalia,Sandrine Ruffel,Kenneth D. Birnbaum,Benoît Lacombe,Wolfgang Busch,Gloria M. Coruzzi,Gabriel Krouk +12 more
TL;DR: A multivariate network model of the interaction between nitrogen and hormones that may predict changes in the architecture response of the Arabidopsis root pinpoints several genes that play key roles in the control of root development and may help understand how eukaryotes manage multifactorial signaling inputs.
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The phosphate transporters LjPT4 and MtPT4 mediate early root responses to phosphate status in non mycorrhizal roots
TL;DR: It is suggested that PT4 genes as novel components of the P-sensing machinery at the root tip level, independently of AM fungi, may have a regulatory role in plant development, irrespective of the fungal presence.
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Interaction Between Macro- and Micro-Nutrients in Plants.
TL;DR: In this article, the authors focus on the recent advances in our understanding of how plants coordinate the acquisition, transport, signaling, and interacting pathways for N, P, S, Fe, and Zn nutrition at the molecular level.
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System analysis of metabolism and the transcriptome in Arabidopsis thaliana roots reveals differential co-regulation upon iron, sulfur and potassium deficiency.
Ilaria Forieri,Carsten Sticht,Michael Reichelt,Norbert Gretz,Malcolm J. Hawkesford,Mario Malagoli,Markus Wirtz,Ruediger Hell +7 more
TL;DR: Interestingly, iron deficiency caused regulation of a different set of genes of the sulfur assimilation pathway compared with sulfur deficiency itself, which demonstrates the presence of specific signal-transduction systems for the cross-regulation of the pathways.
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