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Open AccessArticle

Exogenous Carbon Compounds Modulate Tomato Root Development

Grupo de Bioquímica y Biotecnología, Área de Fisiología Vegetal, Departamento de Ciencias Agrarias y del Medio Natural, ESTCE, Universitat Jaume I, 12071 Castellón, Spain
Authors to whom correspondence should be addressed.
Plants 2020, 9(7), 837;
Received: 30 May 2020 / Revised: 28 June 2020 / Accepted: 29 June 2020 / Published: 3 July 2020
(This article belongs to the Special Issue Plant Nitrogen Assimilation and Metabolism)
NO3 is not only a nutrient, but also a signaling compound that plays an important role in several plant processes, like root development. The present study aimed to investigate the effect of three different exogenous C compounds (sucrose, glucose, 2-oxoglutarate) added to NO3 nutrition on C/N, auxin and antioxidant metabolisms in 10-day-old tomato seedlings. Sucrose and glucose supplementation enhanced primary root (PR) length, lateral root number and root density, while 2-oxoglutarate negatively affected them. This phenomenon was accompanied by a slight increase in NRT2.1 and GS1 gene expression, together with an increase in LAX2 and LAX3 and a decrease in LAX4 in the roots growing under sucrose and glucose sources. The addition of 2-oxoglutarate enhanced the expression of NiR, GDH, PEPC1, LAX1, LAX3 and the antioxidant gene SOD Cl. Taken together, these findings contribute to a better understanding of how these C sources can modulate N uptake and C/N, auxin and antioxidant gene expression, which could be useful for improving nitrogen use efficiency. View Full-Text
Keywords: Solanum lycopersicum; root development; N metabolism; sugars; 2-oxoglutarate Solanum lycopersicum; root development; N metabolism; sugars; 2-oxoglutarate
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MDPI and ACS Style

González-Hernández, A.I.; Scalschi, L.; García-Agustín, P.; Camañes, G. Exogenous Carbon Compounds Modulate Tomato Root Development. Plants 2020, 9, 837.

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