RESUMEN

Cell expansion is coordinated by several cues, but available energy is the major factor determining growth. Receptor protein kinase FERONIA (FER) is a master regulator of cell expansion, but the details of its control mechanisms are not clear. Here we show that FER interacts with cytosolic enzyme glyceraldehyde-3-phosphate dehydrogenase (GAPDH, GAPC1 and GAPC2), that catalyzes a key reaction in glycolysis, which contributes to energy production. When there is an FER deficiency, there are corresponding decreases in the enzyme activity of GAPDH and increased amounts of starch. More importantly, gapc1/2 mutants mimic fer4 mutants. These data indicate that FER regulated starch content is an evolutionarily conserved function in plants that connects the cell expansion and energy metabolism pathways.

Asunto(s)

Proteínas de Arabidopsis/metabolismo , Arabidopsis/metabolismo , Gliceraldehído-3-Fosfato Deshidrogenasa (Fosforilante)/metabolismo , Oryza/metabolismo , Fosfotransferasas/metabolismo , Hojas de la Planta/metabolismo , Plantones/metabolismo , Almidón/biosíntesis , Arabidopsis/genética , Arabidopsis/crecimiento & desarrollo , Proteínas de Arabidopsis/genética , Metabolismo Energético/genética , Regulación de la Expresión Génica de las Plantas , Gliceraldehído-3-Fosfato Deshidrogenasa (Fosforilante)/genética , Isoenzimas/genética , Isoenzimas/metabolismo , Manitol/metabolismo , Manitol/farmacología , Oryza/genética , Oryza/crecimiento & desarrollo , Fosfotransferasas/genética , Hojas de la Planta/genética , Hojas de la Planta/crecimiento & desarrollo , Unión Proteica , Plantones/genética , Plantones/crecimiento & desarrollo , Transducción de Señal , Sacarosa/metabolismo , Sacarosa/farmacología , Técnicas del Sistema de Dos Híbridos