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Table 1 Eigenvectors and eigenvalues for the principal components (PC1, PC2, PC3, and PC4) derived from the variants: RRE, RSE, Cd concentrations in root and shoot (Cd/r and Cd/s), and relative MDA, H2O2, SOD, and APX in root and shoot (MDA/r, MDA/s, H2O2/r, H2O2/s, SOD/r, SOD/s, APX/r, and APX/s)

From: Aspects of cultivar variation in physiological traits related to Cd distribution in rice plants with a short-term stress

Eigenvectors PC1 PC2 PC3 PC4
RRE − 0.1731 0.5049 0.0771 − 0.2975
RSE 0.4088 0.0353 0.0810 0.0199
Cd/r − 0.3804 − 0.1160 0.0248 0.2456
Cd/s − 0.3399 0.0403 0.0255 0.1003
MDA/r − 0.0154 − 0.0208 − 0.6365 0.4529
MDA/s − 0.1973 − 0.2640 0.5915 − 0.0461
H2O2/r 0.3552 − 0.2538 0.2140 0.3310
H2O2/s 0.2074 0.1081 0.3465 0.3627
SOD/r 0.3359 0.3968 − 0.0014 − 0.1216
SOD/s − 0.1542 − 0.2479 − 0.0688 − 0.4204
APX/r − 0.2164 0.3808 0.2468 0.4207
APX/s 0.3884 0.2382 0.0025 − 0.1544
Eigenvalues 4.6986 2.5003 1.7246 1.3185
Proportion 0.3915 0.2084 0.1437 0.1009
Cumulative (%) 39.15 59.99 74.36 85.35