Fig. 6From: Ascorbic acid modulation by ABI4 transcriptional repression of VTC2 in the salt tolerance of ArabidopsisVTC2 functions downstream of ABI4 in modulating seedling growth under salt stress through modifying ascorbic acid (AsA) biosynthesis and reactive oxygen species accumulation. a Seedling growth phenotype of abi4–103, vtc2 and abi4 vtc2 mutants under 100 mM NaCl treatment with or without 40 μM AsA. Bar = 1.4 cm. b Root length of abi4–103, vtc2 and abi4 vtc2 mutants in (A). c Relative values of root length in (B). The root length of Col-0 and all mutants under normal growth conditions was normalized as “1”. d Contents of AsA in Col-0, abi4–103, vtc2 and abi4 vtc2 under the salt stress treatment. e H2O2 and f O2− in Col-0, abi4–103, vtc2 and abi4 vtc2 under the salt stress treatment with or without 40 μM AsA. 7-day-old seedlings were treated with 100 mM NaCl (with or without 40 μM AsA) for 24 h. Values are means ± SD (n = 3). Statistically significant differences are indicated by different letters (P < 0.05, ANOVA with Tukey’s test). FW, fresh weightBack to article page