Figure 4. Phytohormone profiling of the different hydroculture systems (A)-(H) The ABA, SA, JA-Ile, IAA, cZ, cZR, iP, and iPR contents in 0.1 and 4 L water culture systems after being planted with rice seedlings for 12 days, respectively. * significant differences at P<0.05; *** significant differences at P<0.001.