trans-Zeatin riboside is a cytokinin that has been found in squash root xylem sap.1 It suppresses hypocotyl adventitious root formation in cucumber plants when used at concentrations ranging from 0.001 to 1 ?M. trans-Zeatin riboside (10 ?M) increases the activity of superoxide dismutase (SOD), ascorbate peroxidase (APX), catalase (CAT), and guaiacol peroxidase (POD) in the leaves, as well as improves turf quality and delays leaf wilting in a creeping bentgrass model of drought stress.2
1.Kuroha, T., Kato, H., Asami, T., et al.A trans-zeatin riboside in root xylem sap negatively regulates adventitious root formation on cucumber hypocotylsJ. Exp. Bot.53(378)2193-2200(2002) 2.Chang, Z., Liu, Y., Dong, H., et al.Effects of cytokinin and nitrogen on drought tolerance of creeping bentgrassPLos One11(4)e0154005(2016)