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The Dof-type transcription factor ZF4 regulates primary metabolism, sink strength and GA4 gibberellin biosynthesis in tomato fruit
Áreas de investigación
  • Ciencias biológicas
Fruit growth and development involves elaborate physiological and biochemical processes and requires the interplay of numerous gene regulatory networks that are associated with hormonal control mechanisms during its ontogeny. Tomato (Solanum lycopersicum L.) is one of the most cultivated vegetable crop and is an established model for studying fruit biology. Although several efforts have been made to identify genes involved in the determination of key fruit traits related to quality, development and size, little is known about the regulatory genes controlling the diverse processes occurring, especially during growth. In this work, we identified the ZF4 gene, a Dof-type transcription factor, showing high expression levels specifically in fruit tissues at green and red stages. To investigate its role in fruit physiology, we generated tomato plants overexpressing the ZF4 genes specifically in the fruit, and observed that the total yield of the obtained plants increased based on higher amount of both water and dry matter of the fruits. Besides, the higher amount of biomass partitioned to the fruit is related to the higher sink strength of the fruit based on higher activity of sucrose-metabolising enzymes during the fast-growing green phase. In addition, quantitative analyses showed higher GA4 gibberellin accumulation in the fruit of the transgenic lines. Finally, the overexpression of ZF4 also promoted changes in the levels of carbon and nitrogen compounds related to fruit quality. Overall, our results unveils ZF4 as putative key factor controlling tomato fruit growth and composition. This work has been funded by INIA (RTA2015-00014-C02)
Nombre congreso
Fitohormonas. Metabolimso y modo de Accion. Workshop
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Título de las actas
Fitohormonas. Metabolimso y modo de Accion. Workshop
Esta actividad pertenece a memorias de investigación
  • Autor: Jesus Vicente Carbajosa (UPM)
  • Autor: Joaquin Medina Alcazar (UPM)
Grupos de investigación, Departamentos, Centros e Institutos de I+D+i relacionados
  • Creador: Grupo de Investigación: Redes Reguladoras del Desarrollo y Respuesta a Estrés en Plantas
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