Fig. 2.

Histological staining. The stems inclined for 1 and 2 weeks were from Experiment I (cuttings grown for 4 weeks before induction) and stems inclined for 4 weeks were from Experiment II (cuttings grown for 2 weeks before induction). Because of the difference in growth rates between the experiments, the 2-week inclined stems are larger in diameter. (A) Chlorazol black and safranin stain of stem cross-sections. Black staining indicates the presence of G-fibres on the TW side. (B) Phloroglucinol-HCl stain. G-fibres on the TW side show reduced pink staining. Bar: 1000 µm.