Article | 06. 2016 Vol. 34, Issue. 3
H2O2 Pretreatment Modulates Growth and the Antioxidant Defense System of Drought-stressed Zoysiagrass and Kentucky Bluegrass

Southern Forest Resource Research Center, National Institute of Forest Science1
Department of Horticulture, Chungnam National University2

2016.06. 383:395


This study investigated the effect of exogenous hydrogen peroxide (H2O2) on the antioxidant responses and growth of warm-season turfgrass (Zoysia japonica Steud.) and cool-season urfgrass (Poa pratensis L.) subjected to drought stress. Compared with control plants that were not pretreated with H2O2, plants pretreated with H2O2 had significantly greater fresh and dry weights of shoots and roots, and increased water content. H2O2 pretreatments before drought stress significantly decreased the concentrations of malondialdehyde and H2O2. DPPH radical scavenging and glutathione activities were significantly increased. The responsive activities of the antioxidant enzymes superoxide dismutase, ascorbate peroxidase, catalase, and peroxidase were also significantly enhanced. Our results suggest that exogenous H2O2 could improve the growth of warm-season and cool-season turfgrass under drought stress by increasing the activity of their antioxidant enzymes, while decreasing lipid peroxidation.

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