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. 2021 Mar 10;12:642094. doi: 10.3389/fpls.2021.642094

TABLE 2.

Results of Cox proportional hazards regression analysis on growing hyphal tips (GHTs) emission, contact and fusion events of the hyphal healing mechanism (HHM) for Gigaspora sp. MUCL 52331 and Rhizophagus irregularis MUCL 41833 in presence of increasing concentrations of azoxystrobin, pencycuron, flutolanil and fenpropimorph (0.02 and 2 mg L–1).

Gigaspora sp. MUCL 52331 Rhizophagus irregularis MUCL 41833


Fungicide concentration (mg L–1) β Hazard ratio P-value β Hazard ratio P-value
Azoxystrobin
GHT emission 0.02 −0.392 0.676 0.296 −0.457 0.633 0.187
2 −2.009 0.134 <0.001 −0.685 0.504 0.056
GHT contact 0.02 −0.424 0.655 0.259 −0.200 0.818 0.613
2 −2.444 0.064 <0.001 −1.147 0.317 0.020
GHT fusion 0.02 −0.568 0.567 0.140 −0.345 0.708 0.416
2 −3.129 0.044 <0.001 −1.224 0.294 0.021
Pencycuron
GHT emission 0.02 0.083 1.086 0.847 0.484 1.623 0.164
2 0.124 1.133 0.748 0.520 1.682 0.154
GHT contact 0.02 0.243 1.275 0.578 0.114 1.120 0.749
2 −0.050 0.951 0.901 −0.135 0.873 0.728
GHT fusion 0.02 −0.092 0.912 0.840 0.258 1.295 0.506
2 −0.311 0.733 0.464 −0.151 0.860 0.725
Flutolanil
GHT emission 0.02 0.628 1.873 0.073 NA NA NA
2 0.403 1.496 0.267 NA NA NA
GHT contact 0.02 0.178 1.195 0.633 0.075 1.078 0.825
2 0.539 1.714 0.144 0.002 1.002 0.995
GHT fusion 0.02 0.049 1.050 0.899 0.139 1.149 0.709
2 −0.222 0.801 0.569 0.120 1.127 0.752
Fenpropimorph
GHT emission 0.02 0.139 1.149 0.711 1.275 3.580 <0.001
2 −0.415 0.661 0.282 −0.345 0.708 0.334
GHT contact 0.02 −0.475 0.622 0.201 0.805 2.238 0.033
2 −0.414 0.661 0.263 −1.294 0.274 0.007
GHT fusion 0.02 −0.538 0.584 0.185 0.638 1.893 0.109
2 −0.247 0.781 0.533 −1.224 0.294 0.019

Values were considered significant at P < 0.05 compared to the acetone control treatment. β = Regression coefficient. Hazard ratio = Exp (β). NA, Not applicable.