This study explored the impact of water stress on the physiological responses of Melica transsilvanica to endophytic fungal infection.Using both endophyte-infected(E+)and non-infected(E-)plants,a controlled water experiment with soil moisture levels of 60%-65%field water capacity(FWC)was set up for the control(CK),85%-90%FWC for the high humidity treatment(W),and 15%-20%FWC for the drought treatment(D).The significant differences were found in proline content and superoxide dismutase(SOD)activity between E+and E-plants following 7 days of both high humidity and drought stress(P<0.05).After 14 days of stress,the significant differences were observed in chlorophyll,proline,malondialdehyde(MDA)content,SOD,peroxidase(POD),ascorbate peroxidase(APX),and catalase(CAT)activities in E+and E-plants under the same conditions(P<0.05).After 21 days of stress,E+plants had significantly increased MDA content and relative cell membrane permeability compared to E-plants under both conditions(P<0.05).The results suggested that endophytic fungal infection enhanced the tolerance of Melica transsilvanica to water stress.
water stressendophytic fungiMelica transsilvanicaphysiological parametersprotective enzymes
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