Abstract: The present invention relates to the field of nanotechnology, more specifically to the production of gold nanoparticles (AuNPs) from plant extracts derived from leaves, stems, seeds, flowers, fruits or latex from plant species such as Colliguaja salicifolia, Pittosporum Undulatum, Acca sellowiana, Ugni molinae and Colliguaja integerrima, in which naturally occurring biocatalysts are possessed by these plants. The invention also relates to the gold nanoparticles obtained from said plants as well as to said natural biocatalysts.