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Effects of Si application and Pga inoculation on photosynthetic parameters of oat leaves. (A), net photosynthetic rate (P n); (B), stomatal conductance (G s); (C), transpiration rate (T r); (D), intercellular CO2 concentration (C i). CK, no Si application and no Pga inoculation; +Si-P, 1.5 mmol·L–1 Si application and no Pga inoculation; -Si+P, no Si application and Pga inoculation; +Si+P, 1.5 mmol·L–1 Si application and Pga inoculation.
