图2. 茎横截面中不同元素的分布特征 (A) 茎横截面; (B) 磷; (C) 硫; (D) 钙; (E) 钾; (F) 锰; (G) 钙、钾、锰叠加。Bars=500 μm
Figure 2. Distribution characteristics of different elements in stem cross section (A) Stem cross section; (B) P; (C) S; (D) Ca; (E) K; (F) Mn; (G) Ca, K, Mn overlay. Bars=500 μm