Plant Roots
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Plant Roots
How plant roots interact with their environment
Curated by Ruben Rellan
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Genome-wide association study using cellular traits identifies a new regulator of root development in Arabidopsis : Nature Genetics : Nature Publishing Group

Genome-wide association study using cellular traits identifies a new regulator of root development in Arabidopsis : Nature Genetics : Nature Publishing Group | Plant Roots | Scoop.it
Wolfgang Busch and colleagues report results of a genome-wide association study of developmental cell-type traits in Arabidopsis.
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PNAS: Integration of responses within and across Arabidopsis natural accessions uncovers loci controlling root systems architecture

PNAS: Integration of responses within and across Arabidopsis natural accessions uncovers loci controlling root systems architecture | Plant Roots | Scoop.it

"Our study also highlights a strategy for intersecting experimentally perturbed phenotypes within a laboratory strain with those observed across a panel of natural variants to uncovergenetic mechanisms underlying plasticity and natural variation for any evolved trait of interest."


Via Mary Williams
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Mary Williams's curator insight, August 27, 2013 10:32 AM

Phenotypic plasticity of an individual recapitulates phenotypic diversity across natural variants - nice study!

Mary Williams's comment, August 27, 2013 12:48 PM
Thanks to Andres Zurita aka Plant Gene Seeker, for pointing out this paper (http://www.scoop.it/t/plant-gene-seeker-pgs)
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Light Sheet Tomography (LST) for in situ imaging of plant roots

Light Sheet Tomography (LST) for in situ imaging of plant roots | Plant Roots | Scoop.it

The production of crops capable of efficient nutrient use is essential for addressing the problem of global food security. The ability of a plant's root system to interact with the soil micro-environment determines how effectively it can extract water and nutrients. In order to assess this ability and develop the fast and cost effective phenotyping techniques which are needed to establish efficient root systems, in situ imaging in soil is required. To date this has not been possible due to the high density of scatterers and absorbers in soil or because other growth substrates do not sufficiently model the heterogeneity of a soil's microenvironment. We present here a new form of light sheet imaging with novel transparent soil containing refractive index matched particles. This imaging method does not rely on fluorescence, but relies solely on scattering from root material. We term this form of imaging Light Sheet Tomography (LST). We have tested LST on a range of materials and plant roots in transparent soil and gel. Due to the low density of root structures, i.e. relatively large spaces between adjacent roots, long-term monitoring of lettuce root development in situ with subsequent quantitative analysis was achieved.

 
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Plant Methods | Abstract | Novel scanning procedure enabling the vectorization of entire rhizotron-grown root systems

Plant Methods | Abstract | Novel scanning procedure enabling the vectorization of entire rhizotron-grown root systems | Plant Roots | Scoop.it
This paper presents an original spit-and-combine imaging procedure that enables the complete vectorization of complex root systems grown in rhizotrons.
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Guillaume Lobet and Xavier Draye new paper looking at the intersection of root architecture and soil properties.

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NatRevMicrobiol: Microbial ecology of rhizosphere

NatRevMicrobiol: Microbial ecology of rhizosphere | Plant Roots | Scoop.it

Via Mary Williams
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Plasticity of the Arabidopsis root system under nutrient deficiencies

Plasticity of the Arabidopsis root system under nutrient deficiencies | Plant Roots | Scoop.it

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 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 principle 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 on the overall changes in root plasticity induced by the deficiency of single nutrients and provide a solid basis for the identification of nutrient-sensitive steps in the root developmental program.

Ruben Rellan's insight:

A comprehensive study of root system architecture changes under different mineral concentrations from Nico von Wiren lab. As the authors say is surprising that nobody did this before.

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Glutamate signalling via a MEKK1 kinase-dependent pathway induces changes in Arabidopsis root architecture - Forde - 2013 - The Plant Journal - Wiley Online Library

Glutamate signalling via a MEKK1 kinase-dependent pathway induces changes in Arabidopsis root architecture - Forde - 2013 - The Plant Journal - Wiley Online Library | Plant Roots | Scoop.it
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Nice combination of chemical genetics and simple High troughput root system architecture to identify how glutamate affects root architecture

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Deeper roots for better crops

Deeper roots for better crops | Plant Roots | Scoop.it

An interesting effort to breed annual grasses with their perennial relatives that have, deeper, more dense roots so they can better explore soil resources.

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