Fig. 3

Hierarchical average linkage clustering of lipid molecular species contents (nmol per mg dry weight). Left panel: Arabidopsis treated at sub-zero temperatures with subsequent recovery culture for 1 and 3 days. Right panel: Rice treated at low temperatures above 0 °C with subsequent recovery culture for 1 and 3 days. Each coloured bar within a column represents a lipid molecular species in the indicated plants and treatments. The mean value of the same lipid molecular species in different plants and treatments in a row was calculated. The row-wise mean is subtracted from the values in each row of data, so that the mean value of each row is zero. Each coloured bar within a row represents the relative changes from the mean centre of each lipid species. A total of 130 lipid species in the indicated lipid classes were organised using class (as indicated), total acyl carbons (in ascending order within a class) and total double bonds (in ascending order with class and total acyl carbons). “C” represents “control”, “T” is samples taken immediately after treatment, and “R1” and “R3” indicate samples collected after recovery culture for 1 and 3 days, respectively