Table 2 The results of regression analysis showing the relationships between the concentrations of minerals in plants and soil and antioxidant activities. The results were regression formulas with multiple correlation coefficients and multiple determination coefficients (R2). The level of significance was α ≤ 0.05
Methods /organs | Formula | R [%] | R2 [%] | R2 corr [%] |
|---|---|---|---|---|
FRAP C1 |  = 21.136 CuC1 – 122.296 PbC1 + 115.390 ± 32.358 | 71.2 | 51.4 | 37.1 |
Folin C1 |  = 2.991 CuC1 –16.9277 PbC1 + 23.9971 ± 4.41 | 71.2 | 50.2 | 26.0 |
DPPH C1 |  = -83.929 PICu + 120.491 PICr + 85.447 ± 6.9453 | 88.1 | 77.6 | 66.5 |
 = -0.99088 CuSo + 1.89322 CrSo ± 6.9453 | 88.1 | 77.6 | 66.5 | |
Flav C2 |  =—13.4788 PICu ± 1.4129 | 88.4 | 46.8 | 20.2 |
 = -1.22388 CuSo ± 1.7585 | 68.4 | 46.8 | 20.2 | |
FRAP P |  = -17.2973 CuP + 140.225 ± 26.567 | 66.0 | 43.6 | 15.4 |
 = 35.151 PI Cd + 172.511 ± 20.279 | 82.0 | 67.3 | 51.0 | |
 = 3.05654 CdSo ± 0.71598 | 82.9 | 67.3 | 51.0 | |
Folin P |  = -2.60378 CuP + 21.1877 ± 3.9721 | 70.4 | 49.5 | 24.3 |
 = -89.0419 PINi + 5.1283 PICd + 29.4399 ± 3.5794 | 80.0 | 64.2 | 46.2 | |
 = -2.52884 NiSo + 2.79999 CdSo ± 3.5794 | 80.1 | 64.2 | 46.2 | |
DPPH P |  = -8.51493 CuP + 69.7832 ± 11.537 | 74.2 | 55.1 | 32.6 |
 = 94.546 PICu + 15.33 PICd + 85.831 ± 3.1921 | 78.4 | 61.4 | 42.2 | |
 = 0.96731 CuSo + 2.73801 CdSo ± 3.1921 | 78.4 | 61.5 | 42.2 | |
FRAP L |  = -25.551 CuL + 117.6013 PbL + 308.456 ± 32.3845 | 72.4 | 52.4 | 30.4 |
Folin L |  = -3.8831 CuL + 51.4766 ± 4.9858 | 74.9 | 56.1 | 35.9 |
DPPH Sa |  = -3.055 ZnSa + 507.037 CdSa ± 2.4908 | 73.1 | 53.5 | 32.0 |
 = 7.42735 PIPb ± 2.3952 | 73.8 | 54.5 | 31.7 | |
 = 0.63941 PbSo ± 2.3952 | 73.8 | 55.5 | 31.7 |