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Fig. 4 | BMC Plant Biology

Fig. 4

From: Exogenous GABA enhances muskmelon tolerance to salinity-alkalinity stress by regulating redox balance and chlorophyll biosynthesis

Fig. 4

Effects of exogenous GABA on H2O2 levels in muskmelon seedlings. a Effects of exogenous GABA on H2O2 levels in muskmelon seedlings within 72 h. b Effects of exogenous GABA on the relative expression levels of RBOHD gene in muskmelon seedlings within 24 h. The gene transcription levels in Control plants at 0 h was normalized as 1. c Effects of exogenous GABA on H2O2 contents in muskmelon seedlings exposed to salinity-alkalinity stress at 3 d. H2O foliar prespraying for 8 h under normal nutrient solution cultivation conditions, (Control); 50 mM GABA foliar prespraying for 8 h under nutrient solution cultivation conditions, (CG); Normal nutrient solution containing 50 mM salinity-alkalinity and H2O foliar prespraying, (S); 50 mM GABA foliar prespraying for 8 h under salinity-alkalinity stress, (SG). Data were analyzed with SPSS 20 software (IBM) using Tukey’s multiple range test at a significance level of P < 0.05. Data are expressed as the mean ± standard error of three independent biological replicates. Significance is defined as follows: significant at *P < 0.05, **P < 0.01, ***P < 0.001

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