c) Combinations of phenylacetic acid (PAA) and 6-
benzylaminopurine (BAP) in different concentration ratios
were tested in optimized PES and fertilizer/biostimulant
medium. Factorial study was carried out at concentration
ranges of 0, 0.1, 0.3, and 0.5 mg L−1. Culture medium without
phytoregulators was used as the control. Optimized concentration
of the selected plant growth regulator was then applied for
the salinity test.