In the present study,
increased [ABA]leaf and reduced gs under salinity stress was evident,
and it could have been due to salinity induced osmotic stress.
Moreover, less negative [ABA]leaf was noticed in the plants grown
in the biochar amended soil as compared to the plants grown in the
non-biochar treated soil under salinity stress (Fig. 3), which might
be ascribed to increased plant water availability with biochar addition
(Akhtar et al., 2014).