ABA regulates gs, which directly influences
photosynthesis (Liu et al., 2005). Here, we also found significant
negative linear relationship between gs and [ABA]leaf (Fig. 4). However,
the maximum photochemical efficiency of PSII (Fv/Fm) was
not affected by salinity. This is along the mainstream reports on
other species (Abadía et al., 1999; Jimenez et al., 1997), suggesting
that PSII is not the main target of salinity stress.