Natural or light-induced pigment accumulation in grain amaranths coincides with enhanced resistance against insect herbivory

Claudia Portillo-Nava, Moisés Guerrero-Esperanza, Armando Guerrero‐Rangel, Paulina Guevara-Domínguez, Norma Martı́nez-Gallardo, Cecilia Nava-Sandoval, José Juan Ordaz-Ortíz, Lino Sánchez‐Segura, John P. Délano-Frier