MRSI vs CEST MRI to understand tomato metabolism in ripening fruit: is there a better contrast?

Autor: Pagés G; INRAE, UR QuaPA, 63122, Saint-Genès-Champanelle, France. guilhem.pages@inrae.fr.; AgroResonance, INRAE, 2018, Nuclear Magnetic Resonance Facility for Agronomy, Food and Health, Saint-Genès-Champanelle, France. guilhem.pages@inrae.fr., Deborde C; PMB-Metabolome, INRAE, 2018, Bordeaux Metabolome - MetaboHUB, Villenave d'Ornon, France.; INRAE, Univ. Bordeaux, UMR BFP, 33140, Villenave d'Ornon, France., Lemaire-Chamley M; INRAE, Univ. Bordeaux, UMR BFP, 33140, Villenave d'Ornon, France., Moing A; PMB-Metabolome, INRAE, 2018, Bordeaux Metabolome - MetaboHUB, Villenave d'Ornon, France.; INRAE, Univ. Bordeaux, UMR BFP, 33140, Villenave d'Ornon, France., Bonny JM; INRAE, UR QuaPA, 63122, Saint-Genès-Champanelle, France.; AgroResonance, INRAE, 2018, Nuclear Magnetic Resonance Facility for Agronomy, Food and Health, Saint-Genès-Champanelle, France.
Jazyk: angličtina
Zdroj: Analytical and bioanalytical chemistry [Anal Bioanal Chem] 2021 Feb; Vol. 413 (5), pp. 1251-1257. Date of Electronic Publication: 2021 Jan 06.
DOI: 10.1007/s00216-020-03101-w
Abstrakt: Besides structural information, magnetic resonance imaging (MRI) is crucial to reveal the presence and gradients of metabolites in organs constituted of several tissues. In plant science, such knowledge is key to better understand fruit development and metabolism. Routine methods based on fixation for cytological studies or dissection for metabolite measurements induce biases and plant sample destruction. Magnetic resonance spectroscopy imaging (MSRI) leads to one NMR spectrum per pixel while chemical exchange saturation transfer (CEST) MRI allows mapping metabolites having exchangeable protons. As both methods present different advantages and drawbacks, we compared them to map metabolites in ripe tomato fruits. We demonstrated that MRSI was difficult to interpret due to large spatial chemical shift variations while CEST MRI produced promising image mapping of the main carbohydrates and amino acids. It showed that glucose/fructose was mostly located in the locular tissue, whereas glutamate/glutamine/GABA was found inside the columella.Graphical abstract.
Databáze: MEDLINE
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