Getting to the Root of Plant Mineral Nutrition: Combinatorial Nutrient Stresses Reveal Emergent Properties

Bouain, Nadia; Krouk, Gabriel; Lacombe, Benoı̂t; Rouached, Hatem

doi:10.1016/j.tplants.2019.03.008

Cited by 100 publications

(78 citation statements)

References 65 publications

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“…Moreover, modern industrialized agriculture has created a strong demand and dependency for fertilizers, posing the danger of acute limitation of non-renewable fertilizer components, in particular phosphorus (P) [4,5]. All these nutrients (P, Zn and Fe) are taken-up by plants at the root-soil interface, and plants often face conditions in which one or more of these elements are limiting [6,7]. Thus, improving the capacity of plants to absorb these nutrients from the soil is a major goal of crop improvement.…”

Section: Introductionmentioning

confidence: 99%

“…Since Zn and Fe are taken up by roots, improvement of root growth could help increase Zn and Fe content in plants. In Col-0, deficiencies in Fe and Zn impose a change in root architecture in a contrasting manner [6]. While Fe deficiency (-Fe) inhibits root elongation, Zn deficiency (-Zn) slightly promotes early primary root growth [6].…”

Section: Introductionmentioning

confidence: 99%

“…In Col-0, deficiencies in Fe and Zn impose a change in root architecture in a contrasting manner [6]. While Fe deficiency (-Fe) inhibits root elongation, Zn deficiency (-Zn) slightly promotes early primary root growth [6]. Only few genes that regulate primary root growth under -Fe or -Zn conditions have been identified.…”

Section: Introductionmentioning

confidence: 99%

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Systems genomics approaches provide new insights into Arabidopsis thaliana root growth regulation under combinatorial mineral nutrient limitation

et al. 2019

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The molecular mechanisms by which plants modulate their root growth rate (RGR) in response to nutrient deficiency are largely unknown. Using Arabidopsis thaliana accessions, we analyzed RGR variation under combinatorial mineral nutrient deficiencies involving phosphorus (P), iron (Fe), and zinc (Zn). While -P stimulated early RGR of most accessions, -Fe or -Zn reduced it. The combination of either -P-Fe or -P-Zn led to suppression of the growth inhibition exerted by -Fe or -Zn alone. Surprisingly, root growth responses of the reference accession Columbia (Col-0) were not representative of the species under -P nor -Zn. Using a systems approach that combines GWAS, network-based candidate identification, and reverse genetic screen, we identified new genes that regulate root growth in -P-Fe: VIM1, FH6, and VDAC3. Our findings provide a framework to systematically identifying favorable allelic variations to improve root growth, and to better understand how plants sense and respond to multiple environmental cues.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Systems genomics approaches provide new insights into Arabidopsis thaliana root growth regulation under combinatorial mineral nutrient limitation

et al. 2019

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“…Where child and ancestral GO-categories where enriched, only the most defined child categories were selected. (Briat et al, 2015;Bouain et al, 2019), especially since Fe deficiency in humans is of great concern and Fe fortified food would benefit many of the world's population (White and Broadley, 2009).…”

Section: Growth and Ionome Responses Of B Oleracea Accession Receivimentioning

confidence: 99%

Early Responses of Brassica oleracea Roots to Zinc Supply Under Sufficient and Sub-Optimal Phosphorus Supply

et al. 2020

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Shoot zinc (Zn) concentration in Brassica oleracea is affected by soil Zn and phosphorus (P) supply. Most problematic is the negative impact of P fertilizers on Zn concentrations in crops, which makes balancing yield and mineral quality challenging. To evaluate early molecular mechanisms involved in the accumulation of large shoot Zn concentrations regardless of the P supply, two B. oleracea accessions differing in root architecture and root exudates were grown hydroponically for two weeks with different combinations of P and Zn supply. Ionome profiling and deep RNA sequencing of roots revealed interactions of P and Zn in planta, without apparent phenotypic effects. In addition, increasing P supply did not reduce tissue Zn concentration. Substantial changes in gene expression in response to different P and/or Zn supplies in roots of both accessions ensured nutritionally sufficient P and Zn uptake. Numerous genes were differentially expressed after changing Zn or P supply and most of them were unique to only one accession, highlighting their different strategies in achieving nutrient sufficiency. Thus, different gene networks responded to the changing P and Zn supply in the two accessions. Additionally, enrichment analysis of gene ontology classes revealed that genes involved in lipid metabolism, response to starvation, and anion transport mechanisms were most responsive to differences in P and Zn supply in both accessions. The results agreed with previously studies demonstrating alterations in P and Zn transport and phospholipid metabolism in response to reduced P and Zn supply. It is anticipated that improved knowledge of genes responsive to P or Zn supply will help illuminate the roles in uptake and accumulation of P and Zn and might identify candidate genes for breeding highyield-high-Zn brassicas.

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“…Mineral nutrients are inorganic chemical elements acquired primarily from the soil. Many mineral nutrients are imperative for plant growth 6 . They play prominent roles as active, textural components of metalloproteins and enzymes in plants’ viable cells 7 , 8 , and participate in various processes of plant metabolism 9 – 11 .…”

Section: Introductionmentioning

confidence: 99%

Concentration of fifteen elements in herbaceous stems of Ephedra intermedia and influence of its growing soil

Liu

Cen

et al. 2020

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Mineral nutrients play important roles in the growth and metabolism of Ephedra intermedia, and are affected by soil factors. Fifteen elements were measured from wild E. intermedia as well as their growing soils using inductively coupled plasma mass spectroscopy to investigate the influences and characteristics of herb elements. The pH, cation exchange capacity, humus and soil mechanical composition were also determined in rhizosphere soils. Results showed that E. intermedia stems contained high N, low P concentrations in macronutrients and high Fe in micronutrients, and enriched N, S, Cl, P and Sr from soils. The 15 herb elements were affected by one or more soil factors, and K, P, Zn, Fe and Mn were important soil elements that influenced the mineral accumulation of E. intermedia. This study was useful for the artificial cultivation of wild E. intermedia.

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Getting to the Root of Plant Mineral Nutrition: Combinatorial Nutrient Stresses Reveal Emergent Properties

Cited by 100 publications

References 65 publications

Systems genomics approaches provide new insights into Arabidopsis thaliana root growth regulation under combinatorial mineral nutrient limitation

Systems genomics approaches provide new insights into Arabidopsis thaliana root growth regulation under combinatorial mineral nutrient limitation

Early Responses of Brassica oleracea Roots to Zinc Supply Under Sufficient and Sub-Optimal Phosphorus Supply

Concentration of fifteen elements in herbaceous stems of Ephedra intermedia and influence of its growing soil

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