Root colonization with arbuscular mycorrhizal fungi (AMF) improves plant tolerance against soil-borne pathogens. The purpose of the present study was to explore the efficacy of the AMF Rhizophagus intraradices (N.C. Schenck & G.S. Sm.) as a biocontrol agent against Fusarium pseudograminearum (O'Donnell and Aoki) in wheat plants grown under greenhouse conditions. Parameters here analyzed included disease severity, plant morphological features, mycorrhizal structures within roots, and oxidative stress levels. AMF inoculation significantly counteracted on the negative effects of the pathogen F. pseudograminearum on plant parameters such as aerial and root biomass, number of spikes and plant height. These results suggest that AMF inoculation considerably reduced the F. pseudograminearum population density (75.7%) and disease severity (39%) compared to control. In addition, when compared with pathogen-infected plants, AMF-inoculated plants exhibited significant increases in the activity of antioxidant enzymes, along with a decrease in the levels of lipid peroxidation. This is the first work to show R. intraradices plays a significant role in wheat tolerance to F. pseudograminearum infection by maintaining the redox balance and competing for root sites to colonize.

丛枝菌根真菌（AMF）的根定植提高了植物对土壤传播的病原体的耐受性。本研究的目的是探讨AMF根瘤菌内生辐射菌（NC Schenck＆GS Sm。）在温室条件下种植的小麦植株中对假镰孢镰刀菌（O'Donnell和Aoki）的生物防治作用。这里分析的参数包括疾病严重程度，植物形态特征，根内的菌根结构和氧化应激水平。AMF接种明显抵消了病原假单胞菌F. pseudograminearum的负面影响取决于植物参数，例如气生和根生物量，穗数和株高。这些结果表明，与对照相比，AMF接种大大降低了伪镰刀菌的种群密度（75.7％）和疾病严重程度（39％）。另外，当与病原体感染的植物相比时，接种AMF的植物显示出抗氧化酶活性的显着增加，以及脂质过氧化水平的降低。这是第一个证明R. intraradices通过维持氧化还原平衡并竞争根定居点，在小麦抗假单胞菌感染中发挥重要作用的方法。