Figure 6

Heatmap responses of Pearson’s Correlation Coefficient (r) for the crude oil degradation, antioxidant enzymes, chlorophyll contents, osmolyte production of lettuce leaves growing in crude oil contaminated soil treated with pyrochar, thermal desorption, and their combined application. Whereas TChl Total Chlorophyll, MSI Membrane Stability Index, CATL Leaves catalase, PODL Leaves peroxidase, SODL Leaves superoxide dismutase, AA Amioacid, Prol Proline, OP Osmotic potential, Sol Soluble Sugars.