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Artículo

The cytosolic invertase NI6 affects vegetative growth, flowering, fruit set, and yield in tomato

Coluccio Leskow, CarlaIcon ; Conte, Mariana; Del Pozo, Talia; Bermúdez, Luisa; Lira, Bruno Silvestre; Gramegna, Giovanna; Baroli, Irene MabelIcon ; Burgos, EstanislaoIcon ; Zavallo, DiegoIcon ; Kamenetzky, LauraIcon ; Asís, Ramón; Gonzalez, Mauricio; Fernie, Alisdair Robert; Rossi, Maria Magdalena; Osorio, Sonia; Carrari, Fernando OscarIcon
Fecha de publicación: 03/2021
Editorial: Oxford University Press
Revista: Journal of Experimental Botany
ISSN: 0022-0957
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Bioquímica y Biología Molecular

Resumen

Sucrose metabolism is important for most plants, both as the main source of carbon and via signaling mechanisms that have been proposed for this molecule. A cleaving enzyme, invertase (INV) channels sucrose into sink metabolism. Although acid soluble and insoluble invertases have been largely investigated, studies on the role of neutral invertases (A/N-INV) have lagged behind. Here, we identified a tomato A/N-INV encoding gene (NI6) co-localizing with a previously reported quantitative trait locus (QTL) largely affecting primary carbon metabolism in tomato. Of the eight A/N-INV genes identified in the tomato genome, NI6 mRNA is present in all organs, but its expression was higher in sink tissues (mainly roots and fruits). A NI6-GFP fusion protein localized to the cytosol of mesophyll cells. Tomato NI6-silenced plants showed impaired growth phenotype, delayed flowering and a dramatic reduction in fruit set. Global gene expression and metabolite profile analyses of these plants revealed that NI6 is not only essential for sugar metabolism, but also plays a signaling role in stress adaptation. We also identified major hubs, whose expression patterns were greatly affected by NI6 silencing; these hubs were within the signaling cascade that coordinates carbohydrate metabolism with growth and development in tomato.
Palabras clave: CARBON PARTITIONING , CYTOSOLIC INVERTASE , SIGNALING , SUCROSE METABOLISM , TOMATO
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info:eu-repo/semantics/restrictedAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/142147
URL: https://academic.oup.com/jxb/advance-article/doi/10.1093/jxb/eraa594/6047586
DOI: http://dx.doi.org/10.1093/jxb/eraa594
Colecciones
Articulos(IFIBYNE)
Articulos de INST.DE FISIOL., BIOL.MOLECULAR Y NEUROCIENCIAS
Citación
Coluccio Leskow, Carla; Conte, Mariana; Del Pozo, Talia; Bermúdez, Luisa; Lira, Bruno Silvestre; et al.; The cytosolic invertase NI6 affects vegetative growth, flowering, fruit set, and yield in tomato; Oxford University Press; Journal of Experimental Botany; 72; 7; 3-2021; 2525-2543
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