Table 5.
Magnitude of association between the content of chemical compounds in callus and the share of explants forming (non-)embryogenic callus, and the number of somatic embryos per explant, based on the Pearson correlation coefficient (p ≤ 0.05), regardless of medium composition and explant type.
| Trait | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
|---|---|---|---|---|---|---|---|---|
| 1. Non-embryogenic callus | 1.00 | |||||||
| 2. Embryogenic callus | −0.87 | 1.00 | ||||||
| 3. No. of embryos | −0.70 | 0.83 | 1.00 | |||||
| 4. Chlorophyll a | 0.36 | −0.39 | −0.34 | 1.00 | ||||
| 5. Chlorophyll b | 0.30 | −0.33 | −0.31 | 0.93 | 1.00 | |||
| 6. Carotenoids | 0.23 | −0.27 | −0.23 | 0.39 | 0.36 | 1.00 | ||
| 7. Anthocyanins | 0.39 | −0.43 | −0.32 | 0.33 | 0.32 | 0.20 | 1.00 | |
| 8. Polyphenols | 0.41 | −0.48 | −0.36 | 0.33 | 0.33 | 0.28 | 0.78 | 1.00 |
Shade refers to the type of correlation: green colors represent positive correlation, orange colors represent negative correlation; color gradient refers to the strength of correlation (low: |r| ≤ 0.3, moderate: 0.3 < |r| ≤ 0.5, strong: 0.5 < |r| ≤ 0.7 or very strong: |r| > 0.7). Axes separate morphogenetic and biochemical traits.