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. 2020 Apr 14;8:e8990. doi: 10.7717/peerj.8990

Table 6. Correlation matrix between heavy metal concentrations (mg kg−1) of leaf samples (n = 18).

Ni Cd Pb Cr
Co 0.267 0.188 0.259 −0.215
Ni 0.206 0.586* 0.541*
Cd 0.342 −0.194
Pb 0.413

Notes.

*

Significant at p ≤ 0.05.