Fig 1.
AM fungi structures in P. cathayana roots (A, B) and performance of the poplar seedlings with different treatment (C).
a, hypha; b, vesicle; c, spore; d, arbuscule.
Table 1.
Infection rates of P. cathayana males and females under different watering regimes.
Table 2.
Effects of AM fungal formation on growth parameters of P. cathayana males and females under different watering regimes.
Fig 2.
The effect of AM fungi symbiosis on biomass.
(A) Dry weight of shoot (DWS); (B) dry weight of root (DWR); (C) total dry weight (DW); (D) root/shoot ratio (RSR) of poplar seedlings under different watering regimes. Abbreviations: Treatments: +M W: AM fungi inoculation and well-watered;—M W: non-inoculation and well-watered; +M D: AM fungi inoculation and drought;—M D: non-inoculation and drought. AMF: AM fungi. Note: *: significant effect at P ≤ 0.05; **: significant effect at P ≤ 0.01; NS: no significant effect. Different letters above the error bar indicate a significant difference at P ≤ 0.05.
Table 3.
Effect of AM fungi on root morphology of P. cathayana males and females under different watering regimes.
Fig 3.
The effect of AM fungal symbiosis on the O2– (A, B) and H2O2 content (C, D) of leaves and roots under different conditions.
Abbreviations: Treatments: +M W: AM fungi inoculation and well-watered;—M W: non-inoculation and well-watered; +M D: AM fungi inoculation and drought;—M D: non-inoculation and drought; AMF: AM fungi. Note: *: significant effect at P ≤ 0.05; **: significant effect at P ≤ 0.01; NS: no significant effect. Different letters above the error bar indicate a significant difference at P ≤ 0.05.
Fig 4.
The effect of AM fungal symbiosis on the MDA concentration (A, B), POD activity (C, D) and proline content (E, F) of leaves and roots under different conditions.
Abbreviations: Treatments: +M W: AM fungi inoculation and well-watered;—M W: non-inoculation and well-watered; +M D: AM fungi inoculation and drought;—M D: non-inoculation and drought; AMF: AM fungi. Note: *: significant effect at P ≤ 0.05; **: significant effect at P ≤ 0.01; NS: no significant effect. Different letters above the error bar indicate a significant difference at P ≤ 0.05.
Table 4.
Correlation analysis of MDA concentration, proline content, POD activity, and O2− and H2O2 content of leaves and roots.