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• W3120550793 abstract "HomePlant DiseaseVol. 105, No. 8First Report of Fruit Blotch on Plum Caused by Fusarium fujikuroi in China PreviousNext DISEASE NOTE OPENOpen Access licenseFirst Report of Fruit Blotch on Plum Caused by Fusarium fujikuroi in ChinaHaijiang Long, Xianhui Yin, Zhibo Zhao, Youhua Long, Juan Fan, Ran Shu, and Guifei GuHaijiang Longhttps://orcid.org/0000-0001-8106-998XResearch Center for Engineering Technology of Kiwifruit, Institute of Crop Protection, Guizhou University, Guiyang, 550025, ChinaSearch for more papers by this author, Xianhui Yin†Corresponding author. X. H. Yin; E-mail Address: xhyin@gzu.edu.cnResearch Center for Engineering Technology of Kiwifruit, Institute of Crop Protection, Guizhou University, Guiyang, 550025, ChinaSearch for more papers by this author, Zhibo Zhaohttps://orcid.org/0000-0001-5043-1384Research Center for Engineering Technology of Kiwifruit, Institute of Crop Protection, Guizhou University, Guiyang, 550025, ChinaSearch for more papers by this author, Youhua LongResearch Center for Engineering Technology of Kiwifruit, Institute of Crop Protection, Guizhou University, Guiyang, 550025, ChinaSearch for more papers by this author, Juan FanResearch Center for Engineering Technology of Kiwifruit, Institute of Crop Protection, Guizhou University, Guiyang, 550025, ChinaSearch for more papers by this author, Ran ShuResearch Center for Engineering Technology of Kiwifruit, Institute of Crop Protection, Guizhou University, Guiyang, 550025, ChinaSearch for more papers by this author, and Guifei GuResearch Center for Engineering Technology of Kiwifruit, Institute of Crop Protection, Guizhou University, Guiyang, 550025, ChinaSearch for more papers by this author AffiliationsAuthors and Affiliations Haijiang Long Xianhui Yin † Zhibo Zhao Youhua Long Juan Fan Ran Shu Guifei Gu Research Center for Engineering Technology of Kiwifruit, Institute of Crop Protection, Guizhou University, Guiyang, 550025, China Published Online:18 Aug 2021https://doi.org/10.1094/PDIS-08-20-1784-PDNAboutSectionsView articlePDFPDF PlusSupplemental ToolsAdd to favoritesDownload CitationsTrack Citations ShareShare onFacebookTwitterLinked InRedditEmailWechat View articlePlum is commercially cultivated worldwide for the rich nutrients in its fruit. In May 2019, plums with symptoms of fruit rot were collected from fields located in Liuma town, Guizhou Province, China. The incidence of the disease varied from 10 to 20%, which was observed in 15 plum orchards (18 ha) surveyed. Estimated yield loss was ∼5 to 10% for each field. Diseased fruits showed deformity, wilting, and sunken lesions, and they subsequently became melanized and rotted. Diseased tissues were surface disinfected with 70% ethanol for 45 s and rinsed with sterile distilled water three times. Four morphologically similar colonies with white fluffy aerial mycelium and a reddish pigment were obtained after 3 days of incubation on potato dextrose agar (PDA) at 25°C. Four single-spore isolates produced conidia with one to two septa that were sickle-shaped, thin-walled, with a tapering and curved apical cell, measuring 15.6 to 29.6 × 4.8 to 8.7 µm (average 19.5 × 5.9 µm, n = 50). Based on the cultural and conidial morphology, the isolates were identified as Fusarium (Leslie and Summerell 2006; Mun et al. 2012). DNA of two isolates was extracted using the Ezup Column Fungal Genomic DNA Extraction Kit (Sangon Bioengineering Shanghai, Ltd.). To confirm the morphological diagnosis, DNA sequence data from three loci were obtained. PCR amplification was carried out with universal primers ITS1/ITS4 (White et al. 1990), translation elongation factor (EF-1α), EF1-H (5′-ATGGGTAAGGAAGACAAGAC-3′) and EF2-T (5′-GGAAGTACCAGTGATCATGTT-3′) (O’Donnell et al. 1998), and the second largest subunit of RNA polymerase II (RPB2), 5F2 (5′-GGGGWGAYCAGAAGAAGGC-3′) and 7cR (5′-CCCATRGCTTGYTTRCCCAT-3′) (O’Donnell et al. 2007). Primers ITS1 and ITS4 produced a 559-bp amplicon (GenBank accession MW085028). BLAST analysis showed 100% sequence identity to sequences of several species deposited in GenBank, including Fusarium fujikuroi. The EF-1α sequence (MW086868) was 100% identical to that of F. fujikuroi (MN193860.1). The RPB2 primers amplified a fragment (MW086869) that was 99.9% identical to that of F. fujikuroi (MN193888.1). The BLASTn results based on the partial EF-1α and RPB2 sequences suggest isolate HJGF1 is F. fujikuroi. A pathogenicity assay was conducted using an agar disk inoculation method on plum. Fruits were stab inoculated with HJGF1 by piercing 1 mm at three points using a sterile needle, and fruits were mock inoculated with sterile PDA; each fruit was inoculated with three disks. The treated fruits were maintained in a growth chamber with 90% relative humidity at 25°C and a daily 12-h photoperiod. After 5 days, the artificially inoculated fruits showed blotches with sunken lesions similar to those observed in the orchards, whereas no symptoms were observed on the control fruits. The experiment was repeated twice with similar results. F. fujikuroi was reisolated from infected tissues and confirmed by sequence analysis. To our knowledge, this is the first report of F. fujikuroi causing fruit blotch of plum in China. Considering the economic importance of plum in China and throughout the world, F. fujikuroi may be an emerging problem for plum cultivation. Thus, further study of fruit blotch of plum is warranted.The author(s) declare no conflict of interest.References:Leslie, J. F., and Summerell, B. A. 2006. The Fusarium Laboratory Manual. Blackwell Publishing, Ames, IA. https://doi.org/10.1002/9780470278376 Crossref, Google ScholarMun, H. Y., et al. 2012. Plant Pathol. J. 28:49. https://doi.org/10.5423/PPJ.NT.10.2011.0195 Crossref, ISI, Google ScholarO’Donnell, K., et al. 1998. Proc. Natl. Acad. Sci. U.S.A. 95:2044. https://doi.org/10.1073/pnas.95.5.2044 Crossref, ISI, Google ScholarO’Donnell, K., et al. 2007. J. Clin. Microbiol. 45:2235. https://doi.org/10.1128/JCM.00533-07 Crossref, ISI, Google ScholarWhite, T. J., et al. 1990. Page 315 in: PCR Protocols: A Guide to Methods and Applications. Academic Press, San Diego, CA. Crossref, Google ScholarThe author(s) declare no conflict of interest.Funding: This work was supported by the Science and Technology Project of Guizhou Province (grant no. QKHZC2406-2019).DetailsFiguresLiterature CitedRelated Vol. 105, No. 8 August 2021SubscribeISSN:0191-2917e-ISSN:1943-7692 DownloadCaptionComparison of banana plants in silicon-deficient soil amended or nonamended with calcium silicate and infected by Fusarium oxysporum f. sp. cubense (W. Zellner et al.). Photo credit: A. A. Fortunato and F. A. Rodrigues. Infected spicebush tree outer bark showing black vascular discoloration of the sapwood typical of laurel wilt (R. Olatinwo et al.). Photo credit: R. Olatinwo. Maize plants naturally infected by Bipolaris zeicola (S. S. Liu et al.). Photo credit: S. S. Liu. Metrics Downloaded 453 times Article History Issue Date: 1 Dec 2021Published: 18 Aug 2021First Look: 6 Jan 2021Accepted: 5 Jan 2021 Page: 2256 Information© 2021 The American Phytopathological SocietyFundingScience and Technology Project of Guizhou ProvinceGrant/Award Number: QKHZC2406-2019KeywordsFusarium fujikuroifruit blotchplumfungusThe author(s) declare no conflict of interest." @default.
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• W3120550793 title "First Report of Fruit Blotch on Plum Caused by <i>Fusarium fujikuroi</i> in China" @default.
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