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. 2018 Jun 11;9:1248. doi: 10.3389/fmicb.2018.01248

Table 2.

Relationships between the effect sizes of eCO2 on mycorrhizal fungal and plant development parameters and the experimental duration and CO2 fold change.

Qt Qm Qe Slope p-value Sample size
DURATION
Total plant biomass 156.11 0.58 155.53 0.0008 0.447 199
Leaf or needle biomass or area 17.71 0.43 17.28 −0.0058 0.514 27
Shoot biomass 109.70 0.002 109.70 −0.0002 0.969 211
Root biomass 162.78 0.10 162.68 −0.0009 0.753 166
Shoot-to-root ratio 100.00 0.05 99.95 −0.001 0.820 160
N content in total plant 16.14 0.02 16.13 −0.0018 0.897 20
P content in total plant 10.03 0.05 9.98 0.0145 0.819 13
N content in root 17.33 0.03 17.30 −0.0003 0.861 21
P content in root 6.69 0.95 5.74 −0.0078 0.329 18
N content in shoot 22.02 1.27 20.75 0.0251 0.260 25
P content in shoot 13.98 5.50 8.48 −0.1473 0.019 16
N concentration in total plant 8.45 1.90 6.55 0.0121 0.168 13
P concentration in total plant 13.33 3.62 9.71 0.0195 0.057 12
N concentration in root 27.91 0.05 27.86 −0.0025 0.830 29
P concentration in root 66.10 0.02 66.08 −0.0013 0.886 46
N concentration in shoot 24.58 0.12 24.46 0.0101 0.732 41
P concentration in shoot 29.50 1.97 27.53 0.0191 0.160 40
N concentration in leaf 9.03 1.59 7.44 0.0114 0.208 18
P concentration in leaf 20.91 0.25 20.65 −0.0017 0.617 38
Net photosynthesis assimilation rate 17.04 1.01 16.03 0.0065 0.314 16
TSS concentration in leaf 15.48 0.25 15.23 −0.0452 0.620 17
Mycorrhizal fungal colonization 143.34 0.195 143.15 −0.0004 0.659 221
Root with hyphae 45.05 5.38 39.67 0.0032 0.020 44
Root with arbuscules 34.53 1.37 33.17 0.0031 0.242 51
Root with vesicles 14.80 2.01 12.79 0.0064 0.156 15
Extraradical hyphal length 43.34 0.01 49.33 0.0002 0.908 79
Mycorrhizal fungal biomass 34.19 5.18 29.01 0.0032 0.023 45
CO2 FOLD CHANGE
Total plant biomass 150.64 1.09 149.55 0.0147 0.296 188
Leaf or needle biomass or area 16.51 0.19 16.33 0.2064 0.666 24
Shoot biomass 102.43 0.02 102.41 0.0016 0.879 198
Root biomass 154.45 0.05 154.40 0.0023 0.817 154
Shoot-to-root ratio 87.35 0.35 86.99 −0.0068 0.553 149
N content in total plant 15.87 0.07 15.80 −0.0076 0.791 19
P content in total plant 11.16 0.47 10.69 0.0263 0.492 13
N content in root 16.16 0.99 15.17 −0.0297 0.321 19
P content in root 6.69 0.38 6.31 0.0254 0.537 18
N content in shoot 17.73 0.14 17.59 0.0141 0.708 23
P content in shoot 6.60 0.16 6.44 −0.0258 0.693 16
N concentration in total plant 9.04 0.04 9.01 0.0852 0.847 13
P concentration in total plant 11.17 0.22 10.95 0.1766 0.642 12
N concentration in root 30.46 10.22 20.24 −0.0896 0.001 28
P concentration in root 53.69 16.01 37.67 −0.0749 0.000 42
N concentration in shoot 81.56 46.22 35.34 −0.0631 0.000 40
P concentration in shoot 46.73 17.53 29.20 −0.0826 0.000 36
N concentration in leaf 9.71 0.41 9.30 0.3194 0.524 18
P concentration in leaf 27.20 1.75 25.46 0.2673 0.186 38
Net photosynthesis assimilation rate 14.26 0.45 13.81 0.1305 0.501 15
TSS concentration in leaf 23.05 3.62 19.43 0.7570 0.057 17
Mycorrhizal fungal colonization 136.27 0.18 136.09 0.0036 0.671 180
Root with hyphae 11.97 1.14 10.82 −1.1315 0.285 14
Root with arbuscules 14.67 0.33 14.34 0.4291 0.567 22
Root with vesicles 15.63 9.03 6.60 −2.3062 0.003 15
Extraradical hyphal length 97.43 22.87 74.57 1.0995 0.000 77
Mycorrhizal fungal biomass 21.45 1.93 19.52 −0.308 0.164 28

Qt, total heterogeneity in effect sizes among studies; Qm, difference among group cumulative effect sizes; Qe, residual error; TSS, total soluble sugar. The relationship is significant when p < 0.05.