Graphene nanomaterials and copper co-exposure in Populus nigra L.: ultrastructural, biochemical, and nutritional impact under in vitro conditions. - Muccifora S; Iannelli MA; Casentini B; Camoni L; Fiorillo A; Gentile D; Melucci M; Muzzini VG; Iori V (BMC plant biology, 2026)