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. 2017 Sep 22;8:1641. doi: 10.3389/fpls.2017.01641

FIGURE 6.

FIGURE 6

Spatio-temporal regulation of DLK2 promoter activity in DLK2pro:GUS transgenic seedlings and adult plants (bars = 1 mm). (A) GUS histochemical activity in mock and rac-GR24 (10 μM) treated 10-day-old seedlings grown under low light conditions (7 μmol m-2 s-1). Insets show close-ups of the basal section of the hypocotyls. (B) GUS histochemical activity in 6 days old dark grown seedlings. (C) GUS histochemical activity in 4 weeks old whole plants. (D) GUS histochemical activity in the aerial parts of 4 weeks old plants. (i) Stem (ii) Hand section of a stem segment adjacent to the first cauline leaf. (iii) Close-up of the basal part of stem. (iv) Close-up of the basal part of the petiole with the stipules and bud. (E) GUS histochemical activity in the roots of 4 weeks old plants. (i) Whole root (ii) Root segment close to the hypocotyl root junction; root in the differentiation zone; root cap. (iii) Hand section of the root in the differentiation zone.