A method for producing a plant with increased yield as compared to a corresponding wild type plant whereby the method comprises at least the following step: increasing or generating in a plant or a part thereof one or more activities selected from the group consisting of 17.6 kDa class I heat shock protein, 26.5 kDa class I small heat shock protein, 26S protease subunit, 2-Cys peroxiredoxin, 3-dehydroquinate synthase, 5-keto-D-gluconate-5-reductase, asparagine synthetase A, aspartate 1-decar-boxylase precursor, ATP-dependent RNA helicase, B0567-protein, B1088-protein, B1289-protein, B2940-protein, calnexin homolog, CDS5399-protein, chromatin structure-remodeling complex protein, D-amino acid dehydrogenase, D-arabinono-1,4-lac-tone oxidase, Delta 1-pyrroline-5-carboxylate reductase, glycine cleavage complex lipoylprotein, ketodeoxygluconokinase, lipoyl synthase, low-molecular-weight heat-shock protein, Microsomal cytochrome b reductase, mitochondrial ribosomal protein, mitotic check point protein, monodehydroascorbate reductase, paraquat-inducible protein B, phosphatase, Phosphoglucosamine mutase, protein disaggregation chaperone, protein kinase, pyruvate decarboxylase, recA family protein, rhodanese-related sulfurtransferase, ribonuclease P protein component, ribosome modulation factor, sensory histidine kinase, serine hydroxymethyltransferase, SLL1280-protein, SLL1797-protein, small membrane lipoprotein, Small nucleolar ribonucleoprotein complex subunit, Sulfatase, transcription initiation factor subunit, tretraspanin, tRNA ligase, xyloglucan galactosyltransferase, YKL130C-protein, YLR443W-protein, YML096W-protein, and zinc finger family protein-activity.