Endogenous salicylic acid (SA) synthesis of pepper plants inoculated with or without P. resedanum under osmotic stress and normal growth conditions. EA = infected with P. resedanum; SA = treated with SA; SA+EA = endophytic fungal associated plants treated with SA. NST, 2-DT, 4-DT and 8-DT represent non-stressed, 2, 4 and 8 days drought stressed plants respectively. The different letter (s) in each stress period showed significant difference (P<0.05) as evaluated by DMRT.
Khan et al. BMC Microbiology 2013 13:51 doi:10.1186/1471-2180-13-51