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A new Schizophyllum commune strain as a potential biocontrol agent against blueberry root rot

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Abstract

In recent years, blueberry root rot has been caused mainly by Fusarium commune, and there is an urgent need for a green and efficient method to control this disease. To date, research on Schizophyllum commune has focused on antioxidant mechanisms, reactive dye degradation, etc., but the mechanism underlying the inhibition of pathogenic microorganisms is still unclear. Here, the control effects of S. commune on F. commune and blueberry root rot were studied using adversarial culture, tissue culture, and greenhouse pot experiments. The results showed that S. commune can dissolve insoluble phosphorus and secrete various extracellular hydrolases. The results of hyphal confrontation and fermentation broth antagonism experiments showed that S. commune had a significant inhibitory effect on F. commune, with inhibition rates of 70.30% and 22.86%, respectively. Microscopy results showed distortion of F. commune hyphae, indicating that S. commune is strongly parasitic. S. commune had a significant growth-promoting effect on blueberry tissue-cultured seedlings. After inoculation with S. commune, inoculation with the pathogenic fungus, or inoculation at a later time, the strain significantly reduced the root rot disease index in the potted blueberry seedlings, with relative control effects of 79.14% and 62.57%, respectively. In addition, S. commune G18 significantly increased the antioxidant enzyme contents in the aboveground and underground parts of potted blueberry seedlings. We can conclude that S. commune is a potential biocontrol agent that can be used to effectively control blueberry root rot caused by F. commune in the field.

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Acknowledgements

This work was supported by grants to Rui Hou from the China National Science Foundation and Guizhou Provincial Basic Research Program (Natural Science).

Funding

This work was supported by the National Natural Science Foundation of China (32260651) and the Guizhou Provincial Basic Research Program (Natural Science) (Qian Ke He Ji Chu-ZK [2023] Yi Ban 094).

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H.R. and Z.F. provided concepts and methodology, L.J. and Z.F. prepared formal analysis and investigation, L.J. and H.R. wrote the main manuscript text. All the authors reviewed the manuscript.

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Correspondence to Rui Hou.

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Communicated by Yusuf Akhter.

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Li, J., Hou, R. & Zhang, F. A new Schizophyllum commune strain as a potential biocontrol agent against blueberry root rot. Arch Microbiol 206, 235 (2024). https://doi.org/10.1007/s00203-024-03959-9

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