highly significantP < 0.01
Correlation and grey relational analyses Highly significant ( P < 0.01) positive, or significant (0.01 ≤ P < 0.05) positive correlations existed among root biomass, shoot biomass, root total Se content, shoot total Se content, chlorophyll b content, carotenoid content, SOD activity, POD activity, CAT activity, soluble protein content, ATPS activity, APR activity, SAT activity, and SMT activity ( Table 3 ).