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Mean and SD of the area ratio between xylem and pith of each grades.
| Maidong | Area ratio between xylem and pith |
|---|---|
| Zhe-Maidong | 3.306 ± 1.663 (mean ± SD, n = 16) |
| Chuan-Maidong | 1.282 ± 0.196 (mean ± SD, n = 16) |
| Chuan-Maidong with paclobutrazol | 0.691 ± 0.161 (mean ± SD, n = 40) |
