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Root proteome and metabolome reveal a high nutritional dependency of aluminium in Qualea grandiflora Mart. (Vochysiaceae)

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Abstract

Aims

The relationship between aluminium (Al) and plants has been investigated for a long time. Al is typically harmful to plants, however Qualea grandiflora Mart., a compulsory accumulator of this metal, may benefit from it. To understand this peculiarity, proteomic and metabolite profiling analyses were carried out to investigate, at physiological, metabolic, and molecular levels, the relevance of Al for this species.

Methods

Qualea grandiflora plants were grown with MS medium with or without Al-supplementation for 120 days. Metabolite profiling using GC-MS and growth analysis were conducted to evaluate the biochemical and physiological effects of Al. Concomitantly, root proteins were extracted, identified and quantified using label-free LC-MS/MS.

Results

Al-starved Q. grandiflora plants had shorter shoots, roots, lower biomass, and chlorotic leaves. Furthermore, there was a high coherence between proteomic and metabolomic data. Al was critical for cell wall and lignin syntheses, genetic information processing, and organic acid metabolism. Also, Al might help P uptake in this plant.

Conclusions

Qualea grandiflora plants needed Al to grow and develop properly. Moreover, there was a good match between the data from physiological/metabolic analyses and the upregulated metabolic pathways indicated by proteome investigation. Hence, we propose that Q. grandiflora root metabolism is highly dependent on Al.

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Abbreviations

AGC:

Automatic gain control

Al:

Aluminium

AlCl3 :

Aluminium chloride

DDA:

Data dependent acquisition

DMF:

N, N-dimethylformamide-HCON (CH3) 2

DTT:

Dithiothreitol

FDR:

False discovery rate

GC-MS:

Gas Chromatography Mass Spectrometry

HCD:

High-energy collision-induced dissociation

IAA:

Iodoacetamide

MS:

Murashige and Skoog medium

MTFSA:

N-Methyltrimethylsilyltrifluoroacetamide

NH4HCO3 :

Ammonium bicarbonate

NIST:

National Institute of Standards and Technology mass spectral library

SDS-PAGE:

Sodium dodecyl sulfate polyacrylamide gel electrophoresis

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Acknowledgments

We would like to thank the Coordination for the Improvement of Higher Education Personnel (CAPES), the Brazilian Council of Research (CNPq), and the Support Research of the Federal District Foundation (FAP-DF) for their financial support of this research. Furthermore, we also thank Dr. Fernando Araripe Gonçalves Torres for his valuable help.

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Correspondence to Luiz A. R. Pereira.

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Responsible Editor: Yong Chao Liang.

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Cury, N.F., Silva, R.C.C., Andre, M.S.F. et al. Root proteome and metabolome reveal a high nutritional dependency of aluminium in Qualea grandiflora Mart. (Vochysiaceae). Plant Soil 446, 125–143 (2020). https://doi.org/10.1007/s11104-019-04323-3

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  • DOI: https://doi.org/10.1007/s11104-019-04323-3

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