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Identification and pathogenicity of Fusarium spp. associated with the sheath rot disease of rice (Oryza sativa) in Indonesia

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Abstract

Sheath rot disease seriously limits rice productivity in several countries. In this study, Fusarium spp. were proven to be major pathogens responsible for sheath rot disease in Indonesia. The disease was initially found in 13 provinces in Indonesia. A total of 287 fungal isolates was obtained from 900 sampled leaf sheaths, and all of them were shown to be pathogenic to rice plants by artificial inoculation. Molecular identification of sheath rot pathogens was performed using the translation elongation factor 1-alpha (TEF1-α) gene sequencing. Morphological characterization was conducted using synthetic low-nutrient agar (SNA) using filter paper. Species within the Fusarium incarnatum-equiseti species complex (FIESC) and the Fusarium fujikuroi species complex (FFSC) were the major taxa found to be associated with the disease. The FIESC included Fusarium bubalinum, F. hainanense, F. sulawesiense and F. tanahbumbuense. The FFSC included F. andiyazi, F. fujikuroi, F. proliferatum, F. pseudocircinatum, and F. sacchari. Fusarium grosmichelii, a member of the Fusarium oxysporum species complex (FOSC), and a species within the Fusarium solani species complex (FSSC) were also found to be associated with the disease. The species in the FIESC and the FFSC are morphologically difficult to distinguish; however, some FFSC species have some diagnostic traits. This is the first study to identify the Fusarium spp. causing sheath rot disease in Indonesia through field survey, fungal isolation, pathogenicity test, molecular identification, and morphological characterization.

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Acknowledgements

This study has been funded by the Ministry of Research, Technology and Higher Education of the Republic of Indonesia through PMDSU number 5829/UN1.DITLIT/DIT-LIT/LT/2018. The authors thank Sri Giyanti (Universitas Gadjah Mada, Indonesia), Tomomi Katsu, and Ayako Usui (Gifu University, Japan) for their technical supports.

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Correspondence to Achmadi Priyatmojo.

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42161_2021_988_MOESM1_ESM.tif

Supplementary file1 (TIF 1038 KB) The Maximum Likelihood consensus tree based on RPB2 sequence alignments of Fusarium grosmichelii, F. hexaseptatum, F. callistephi, F. cugenangense, F. duoseptatum, F tardichlamydosporum, and F. oxysporum. Bootstrap values ≥ 60% (maximum parsimony and maximum likelihood) and posterior probability ≥ 95% (Bayesian inference) are in the internodes, respectively. Acremonium sp. was used as the outgroup taxon (a). Comparison of the RPB2 sequences among Fusarium grosmichelii JBR A (OK324964), F. grosmichelii InaCC F833 (LS479295), InaCC F848 (LS479338), and InaCC F852 (LS479342) as confirmed spesies of Fusarium grosmichelii and F. hexaseptatum InaCC F866 (LS479359) (b)

Supplementary file2 (DOCX 45 KB) Fusarium spp. collected from sheath rot disease symptoms in Indonesia

42161_2021_988_MOESM3_ESM.docx

Supplementary file3 (DOCX 27 KB) a TEF1-α reference sequences to generate phylogenetic tree used in this study. b RPB2 reference sequences to generate phylogenetic tree used in this study

42161_2021_988_MOESM4_ESM.docx

Supplementary file4 (DOCX 25 KB) a The TEF1-α sequence alignments used to generate phylogenetic tree. b RPB2 sequence alignments used to generate phylogenetic tree

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Pramunadipta, S., Widiastuti, A., Wibowo, A. et al. Identification and pathogenicity of Fusarium spp. associated with the sheath rot disease of rice (Oryza sativa) in Indonesia. J Plant Pathol 104, 251–267 (2022). https://doi.org/10.1007/s42161-021-00988-x

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  • DOI: https://doi.org/10.1007/s42161-021-00988-x

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