Figure 1

The effect of inoculation treatment and water deficit stress on membrane stability index (a), total chlorophyll (Chlt) (b), carotenoids (c), maximum photochemical efficiency of photosystem II (Fv′/Fm′) (d) of moldavian balm. The means with a similar letter are not significantly different at the 1% probability level. No water deficit stress: 85–100% FC; low water deficit stress: 70–85% FC; medium water deficit stress: 55–70% FC; high water deficit stress: 40–55% FC.