Fig. 3

Three-dimensional plots of micronutrients content in the ‘between-leaves’ gradient and in the ‘in-leaf’ senescence gradient of the sugarcane cv. RB867515. Boron (a), copper (b), iron (c), zinc (d), manganese (e), and aluminum (f) were tested. The “leaf” axis represents the sugarcane leaves numbering system according to Kuijper [26]. Statistical analysis: leaf refers to statistics applied in different leaves (from +1 to +8); leaf position refers to statistics applied to the same leaf (base, middle and tip portions), and leaf *position refers to statistics applied to the whole data set (‘between-leaves’ and ‘in-leaf’ gradients); asterisk indicates statistical difference: **p ≤ 0.01, *p ≤ 0.05, and ns non-significant. The ANOVA and p values significant are available in the Additional file 2. DM dry mass