Figure 2.—

Natural variation in temperature compensation. Mean period of accessions plotted against temperature and separated by temperature-compensation response into accessions that show period shortening as temperature increases between 12° and 27° (A); accessions that show period shortening between 12° and 22°, followed by little change between 22° and 27° (B); accessions that show period shortening between 12° and 22° and period lengthening between 22° and 27° (C); and accessions that show little change in period between 12° and 27° (D). See insets for accession identities.