Fig. 2
Effect of individual and combined application of IAA and compost on gas exchange attributes i.e., (A) Sub-stomatal conductance (SSC; µmole CO2 mol− 1), (B) Vapor pressure deficit (VPD; kPa), (C) Water use efficiency (WUE; mmol CO2 mol− 1 H2O), (D) Net photosynthetic rate (µmol m− 2 s− 1), (E) Stomatal Conductance (mmol m− 2 s− 1), and (F) Transpiration rate (TR; µM m− 2 s− 1) under Ni stress. Bars displaying same alphabets are statistically non-significant at P < 0.05