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. 2019 Nov 28;39(2):e101928. doi: 10.15252/embj.2019101928

Figure 1. UV‐B inhibits the growth of lateral roots in a UVR8‐dependent manner.

Figure 1

  • A–C
    Phenotypic analysis. Wild‐type, uvr8, and rup1 rup2 seedlings were grown in 1/2 MS with or without UV‐B (1 W/m2) for 2 weeks. Images are shown in (A); scale bars = 5 mm. The lateral root density (number of lateral roots/length of primary root) (B) and average length of lateral roots (each plant) (C) of the indicated genotypes were measured. SDs (n > 8 independent seedlings) are indicated. Letters “a” to “d” indicate statistically significant differences for the indicated values, as determined by a one‐way analysis of variance (ANOVA), followed by Tukey's least significant difference (LSD) test (P < 0.05). There was statistically significant difference between values marked with different letters (for example “a” and “b”), while there was no statistically significant difference between values marked with the same letters (for example “a” and “a”).
  • D
    Distribution of lateral root primordia stages. Seedlings of the indicated genotypes were grown in 1/2 MS treatment with or without UV‐B (1 W/m2) for 2 weeks. SDs (n > 8) are indicated. “***” indicates statistically significant differences (P < 0.001), as determined by Student's t‐test.
  • E, F
    GUS staining of seedlings expressing DR5p::GUS transgene in the WT, uvr8, and rup1 rup2 background. Seedlings were grown in 1/2 MS with or without UV‐B for 2 weeks. Images of lateral root primordia (E) and lateral roots (F) are shown. Scale bars = 100 and 50 μm, respectively.