Figure 5

The development process of a secretory tract of HBZ and QBZ (A Secretory tract genesis of HBZ; B Secretory tract genesis of QBZ; C Secretory tract of HBZ in March; D Secretory tract of HBZ in July; E Secretory tract of QBZ in March; F Secretory tract of QBZ in July; a: epiderm; b: cortex; c: phloem; d: cambium; e: xylem; f: secondary canals; Scale bars: A, B: 50 μm; C, E: 500 μm; D, F: 1000 μm).