SUPPLEMENTARY MATERIAL
CORRELATION ANALYSIS OF METAL/METALLOID CONCENTRATIONS IN PLANT AND SOIL SAMPLES
Table1 Spearman’s correlation matrix for As in Corylus spp.
As_S / As_WL / As_C / As_ULAs_S / 1 / .152 / -.214 / .355
As_WL / 1 / -.452 / .818**
As_C / 1 / -.619
As_UL / 1
S – soil; WL – washed leaves; C – catkins; UL – unwashed leaves;
Significant correlation shown in italic; **P < 0.01 (2–tailed); *P < 0.05 level (2–tailed).
Table2Spearman’s correlation matrix for Cr in Corylus spp.
Cr_S / Cr_R / Cr_B / Cr_WL / Cr_C / Cr_ULCr_S / 1 / .173 / -.028 / -.154 / .536 / -.462
Cr_R / 1 / -.155 / .027 / .429 / -.509
Cr_B / 1 / -.105 / -.571 / .336
Cr_WL / 1 / -.536 / -.112
Cr_C / 1 / -.357
Cr_UL / 1
S – soil; R – root; WL – washed leaves; B – branch; C – catkins; UL – unwashed leaves.
Table 3Spearman’s correlation matrix for Cu in Corylus spp.
Cu_S / Cu_R / Cu_B / Cu_WL / Cu_C / Cu_ULCu_S / 1 / .783** / .224 / .720** / .690 / .734**
Cu_R / 1 / .021 / .490 / .762* / .503
Cu_B / 1 / .126 / .476 / .224
Cu_WL / 1 / .786* / .944**
Cu_C / 1 / .929**
Cu_UL / 1
S – soil; R – root; WL – washed leaves; B – branch; C – catkins; UL – unwashed leaves;
Significant correlation shown in italic;**P < 0.01 (2–tailed); *P < 0.05 level (2–tailed).
Table 4 Spearman’s correlation matrix for Mo in Corylus spp.
Mo_S / Mo_WL / Mo_C / Mo_ULMo_S / 1 / .682** / .714 / .518
Mo_WL / 1 / .771 / .900**
Mo_C / 1 / .943**
Mo_UL / 1
S – soil; WL – washed leaves; C – catkins; UL – unwashed leaves;
Significant correlation shown in italic;**P < 0.01 (2–tailed); *P < 0.05 level (2–tailed).
Table 5Spearman’s correlation matrix for Mn in Corylus spp.
Mn_S / Mn_R / Mn_B / Mn_WL / Mn_C / Mn_ULMn_S / -.252 / -.357 / -.503 / -.167 / -.476
Mn_R / 1 / .727** / .671* / .310 / .720**
Mn_B / 1 / .699* / .381 / .909**
Mn_WL / 1 / .524 / .743**
Mn_C / 1 / .619
Mn_UL / 1
S – soil; R – root; WL – washed leaves; B – branch; C – catkins; UL – unwashed leaves;
Significant correlation shown in italic;**P < 0.01 (2–tailed); *P < 0.05 level (2–tailed).
Table6 Spearman’s correlation matrix for Fe in Corylus spp.
Fe_S / Fe_R / Fe_B / Fe_WL / Fe_C / Fe_ULFe_S / 1 / .056 / .259 / .427 / -.214 / .280
Fe_R / 1 / -.636* / -.455 / -.167 / -.566
Fe_B / 1 / .175 / -.024 / .420
Fe_WL / 1 / .548 / .664*
Fe_C / 1 / .643
Fe_UL / 1
S – soil; R – root; WL – washed leaves; B – branch; C – catkins; UL – unwashed leaves;
Significant correlation shown in italic;**P < 0.01 (2–tailed); *P < 0.05 level (2–tailed).
Table7Spearman’s correlation matrix for Ni in Corylus spp.
Ni_S / Ni_R / Ni_B / Ni_WL / Ni_C / Ni_ULNi_S / 1 / -.333 / .000 / .224 / -.333 / -.056
Ni_R / 1 / .633 / .367 / .300 / .417
Ni_B / 1 / .636* / .286 / .385
Ni_WL / 1 / .119 / .583
Ni_C / 1 / .857**
Ni_UL / 1
S – soil; R – root; WL – washed leaves; B – branch; C – catkins; UL – unwashed leaves;
Significant correlation shown in italic;**P < 0.01 (2–tailed); *P < 0.05 level (2–tailed).
Table 8Spearman’s correlation matrix for Pb in Corylus spp.
Pb_S / Pb_B / Pb_WL / Pb_C / Pb_ULPb_S / 1 / .648* / .510 / .333 / .587*
Pb_B / 1 / .794** / .464 / .806**
Pb_WL / 1 / .619 / .944**
Pb_C / 1 / .762*
Pb_UL / 1
S – soil; B – branch; WL – washed leaves; C – catkins; UL – unwashed leaves;
Significant correlation shown in italic;**P < 0.01 (2–tailed); *P < 0.05 level (2–tailed).
Table9Spearman’s correlation matrix for Zn in Corylus spp.
Zn_S / Zn_R / Zn_B / Zn_WL / Zn_C / Zn_ULZn_S / 1 / .385 / .238 / .497 / .262 / .685*
Zn_R / 1 / -.133 / .119 / .381 / .287
Zn_B / 1 / -.042 / .167 / .175
Zn_WL / 1 / .714* / .888**
Zn_C / 1 / .643
Zn_UL / 1
S – soil; R – root; B – branch; WL – washed leaves; C – catkins; UL – unwashed leaves;
Significant correlation shown in italic;**P < 0.01 (2–tailed); *P < 0.05 level (2–tailed).
Table 10 Spearman's correlation matrix for elements in soil (S) samples of Corylusspp.
Al_S / As_S / Cd_S / Co_S / Cr_S / Cu_S / Fe_S / Mn_S / Mo_S / Ni_S / Pb_S / Zn_SAl_S / 1
As_S / -.168 / 1
Cd_S / -.133 / .820** / 1
Co_S / .671* / -.385 / -.035 / 1
Cr_S / -.049 / -.357 / -.508 / -.364 / 1
Cu_S / .140 / .755** / .900** / .133 / -.448 / 1
Fe_S / .755** / -.014 / .263 / .881** / -.455 / .420 / 1
Mn_S / .580* / .035 / .312 / .755** / -.406 / .497 / .909** / 1
Mo_S / -.091 / .622* / .781** / -.042 / -.385 / .867** / .112 / .252 / 1
Ni_S / .273 / -.329 / -.469 / -.140 / .762** / -.245 / -.112 / .000 / -.217 / 1
Pb_S / .042 / .706* / .872** / .035 / -.280 / .930** / .364 / .483 / .741** / -.063 / 1
Zn_S / .035 / .587* / .746** / .084 / -.308 / .874** / .378 / .566 / .713** / .021 / .951** / 1
**P < 0.01 (2–tailed); *P < 0.05 level (2–tailed).
Table 11 Spearman’s correlation matrix for elements in root (R) of Corylus spp.
Cr_R / Cu_R / Mn_R / Fe_R / Ni_R / Zn_RCr_R / 1
Cu_R / .409 / 1
Mn_R / .591 / .301 / 1
Fe_R / .800** / .224 / .692* / 1
Ni_R / .867** / .383 / .550 / .900** / 1
Zn_R / .700* / .832** / .406 / .559 / .650 / 1
Significant correlation shown in italic; **P < 0.01 (2–tailed); *P < 0.05 level (2–tailed).
Table 12 Spearman’s correlation matrix for elements in branch (B) of Corylus spp.
Cr_B / Cu_B / Mn_B / Fe_B / Ni_B / Pb_B / Zn_BCr_B / 1
Cu_B / .636* / 1
Mn_B / -.364 / -.252 / 1
Fe_B / .755** / .888** / -.378 / 1
Ni_B / .000 / .000 / -.049 / -.147 / 1
Pb_B / .515 / .794** / -.527 / .758* / .309 / 1
Zn_B / .517 / .902** / -.161 / .818** / .119 / .600 / 1
Significant correlation shown in italic; **P < 0.01 (2–tailed); *P < 0.05 level (2–tailed).
Table 13 Spearman’s correlation matrix for elements in washed leaves (WL) of Corylus spp.
Pb_WL / Zn_WL / Ni_WL / Fe_WL / Mo_WL / Mn_WL / Cu_WL / Cr_WL / As_WLPb_WL / 1
Zn_WL / .867** / 1
Ni_WL / -.559 / -.601* / 1
Fe_WL / .741** / .713** / -.378 / 1
Mo_WL / .800** / .782** / -.355 / .791** / 1
Mn_WL / -.392 / -.357 / .531 / -.420 / -.291 / 1
Cu_WL / .916** / .769** / -.392 / .797** / .845** / -.385 / 1
Cr_WL / -.147 / -.042 / .203 / .182 / -.036 / .182 / -.196 / 1
As_WL / .794** / .600 / .042 / .576 / .855** / -.491 / .891** / -.333 / 1
Significant correlation shown in italic; **P < 0.01 (2–tailed); *P < 0.05 level (2–tailed).
Table 14 Spearman’s correlation matrix for elements in catkins (C) of Corylus spp.
As_C / Cr_C / Cu_C / Mn_C / Mo_C / Fe_C / Ni_C / Pb_C / Zn_CAs_C / 1
Cr_C / .486 / 1
Cu_C / -.143 / .000 / 1
Mn_C / -.143 / -.607 / -.548 / 1
Mo_C / -.700 / -.300 / 1.000** / -.486 / 1
Fe_C / .536 / .000 / .262 / -.619 / .429 / 1
Ni_C / -.214 / -.357 / .667 / -.571 / .829* / .714* / 1
Pb_C / -.214 / -.357 / .667 / -.571 / .829* / .714* / 1.000** / 1
Zn_C / -.464 / -.536 / .476 / .214 / .600 / .024 / .381 / .381 / 1
Significant correlation shown in italic; **P < 0.01 (2–tailed); *P < 0.05 level (2–tailed).
Table 15 Spearman’s correlation matrix for elements in unwashed leaves (UL) of Corylus spp.
As_UL / Cr_UL / Cu_UL / Mn_UL / Fe_UL / Mo_UL / Ni_UL / Pb_UL / Zn_ULAs_UL / 1
Cr_UL / .791** / 1
Cu_UL / .855** / .657* / 1
Mn_UL / -.255 / -.664* / -.238 / 1
Fe_UL / .764** / .790** / .860** / -.531 / 1
Mo_UL / .855** / .618* / .955** / -.009 / .809** / 1
Ni_UL / .327 / -.063 / -.098 / -.077 / -.126 / -.009 / 1
Pb_UL / .891** / .727** / .972** / -.287 / .874** / .982** / -.119 / 1
Zn_UL / .873** / .650* / .951** / -.287 / .790** / .891** / .007 / .958** / 1
Significant correlation shown in italic; **P < 0.01 (2–tailed); *P < 0.05 level (2–tailed).
Table 16 Spearman's correlation coefficients for pairs of elements in soil and plant parts of Corylusspp.
Part / CorrelationsCu–Zn / Cu–Pb / Cu–As / Cu–Mo / Cu–Fe / Cu–Cr / Fe–Pb / Fe–Ni / Fe–Mn / Fe–Cr / Fe–Zn / Fe–Mo / Fe–As / Pb–Zn
S / .874** / .930** / .755** / .867** / / / / / / / / / .909** / / / / / / / / / .951**
R / .832** / /b / /a / /b / / / / / /b / .900** / .692* / .800** / / / /b / /a / /b
B / .902** / .794** / /a / /b / .888** / .636* / .758* / / / / / .755** / .818** / /b / /a / /
WL / .769** / .916** / .891** / .845** / .797** / / / .741** / / / / / / / .713** / .791** / / / .867**
UL / .951** / .972** / .855** / .955** / .860** / .657* / .874** / / / / / .790** / .790** / .809** / .764** / .958**
C / / / / / / / 1.00** / / / / / .714* / .714* / / / / / / / / / / / /
Part / Correlations
Pb–As / Pb–Cr / Pb–Mo / Pb–Ni / Zn–Cr / Zn–Mo / Zn–Ni / Zn–As / Cr–Ni / Cr–Mn / Cr-Mo / Cr–As / As–Mo / Ni–Mo
S / .706** / / / .741** / / / / / .713** / / / .587* / .762** / / / / / / / .622* / /
R / /a,b / /b / /b / /b / .700** / /b / / / /a / .867** / / / /b / /a / /a,b / /b
B / /a / / / /b / / / / / /b / / / /a / / / / / /b / /a / /a,b / /b
WL / .794** / / / .800** / / / / / .782** / -.601* / / / / / / / / / / / .855** / /
UL / .891** / .727** / .982** / / / .650** / .891** / / / .873** / / / -.664* / .618* / .791** / .855** / /
C / / / / / .829* / 1.00** / / / / / / / / / / / / / / / / / / / .829*
Part / Correlations
Cd–Cu / Cd–Mo / Cd–Pb / Cd–Zn / Cd–As / Co–Fe / Co–Mn
S / .900** / .781** / .872** / .746** / .820** / .881** / .755**
R / /a / /a / /a / /a / /a / /a / /a
B / /a / /a / /a / /a / /a / /a / /a
WL / /a / /a / /a / /a / /a / /a / /a
UL / /a / /a / /a / /a / /a / /a / /a
C / /a / /a / /a / /a / /a / /a / /a
S – soil; R – root; B – branch; WL – washed leaves; UL – unwashed leaves; C – catkins; **P < 0.01 (2–tailed); *P < 0.05 level (2–tailed); / No significant correlation; aNo correlation due to a missing plant part; bNo correlation due to an excluded plant part since N≤3.
Table 17 Spearman's correlation coefficients for certain element in specific samples of Corylusspp.
S / R / B / WL / UL / CS / 1 / Cu (.783**) / Pb (.648*) / Cu (.720**), Mo(.682**) / Cu (.734**), Pb (.587*),
Zn (.685**) / /
R / 1 / Mn (.727**), Fe (-.636*) / Mn (.671*) / Mn (.720**) / Cu (.762*)
B / 1 / Ni (.636*), Pb (.794**) / Mn (.909**), Pb (.806**) / /
WL / 1 / As (.818**), Cu (.944**),
Mo (.900**), Mn (.734**),
Fe (.664*), Pb (.944**),
Zn (.888**) / Cu (.786*), Zn (.714*)
UL / 1 / Cu (.929**), Mo (.943**)
Ni (.857**),Pb (.762**)
C / 1
S – soil; R – root; B – branch; WL – washed leaves; UL – unwashed leaves; C – catkins; **P<0.01 (2–tailed); *P<0.05 level (2–tailed); / No observed significant correlation