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- W2085386766 abstract "HomePlant DiseaseVol. 99, No. 8Seedling Blight of Codonopsis lanceolata Caused by Rhizoctonia solani AG-1-IB in China PreviousNext DISEASE NOTES OPENOpen Access licenseSeedling Blight of Codonopsis lanceolata Caused by Rhizoctonia solani AG-1-IB in ChinaY. Xie, Q. Bai, X. Jiang, and J. GaoY. XieSearch for more papers by this author, Q. BaiSearch for more papers by this author, X. JiangSearch for more papers by this author, and J. GaoSearch for more papers by this authorAffiliationsAuthors and Affiliations Y. Xie , Engineering Research Center of Chinese Ministry of Education for Edible and Medicinal Fungi, Jilin Agricultural University, Changchun 130118, Jilin Province, P. R. China; and College of Agronomy, Jilin Agricultural University, Changchun 130118, Jilin Province, P. R. China Q. Bai X. Jiang J. Gao , College of Agronomy, Jilin Agricultural University, Changchun 130118, Jilin Province, P. R. China. Published Online:23 Jun 2015https://doi.org/10.1094/PDIS-01-15-0046-PDNAboutSections ToolsAdd to favoritesDownload CitationsTrack Citations ShareShare onFacebookTwitterLinked InRedditEmailWechat Codonopsis lanceolata (Sieb. et Zucc.) Trautv, family Campanulaceae, commonly called bonnet bellflower, is a perennial herb with high value in traditional Chinese medicine, and its root is popularly used as a vegetable in some Asian countries. It is distributed mainly in the northeast, south, and southwest China, and in Korea, Japan, and Russia. It is extensively cultivated in northeastern China. In August 2012, plants exhibiting wilting symptoms and dark lesions on leaves and stems near the ground were observed in a seedling field in Jilin Agricultural University, China. More than 60% of plants had symptoms and almost 20% of the infected plants became necrotic and died. Leaf and stem fragments taken from the margins of the healthy and diseased tissues were surface disinfected in 70% alcohol for 30 s and 0.5% NaOCl for 1 min, rinsed with sterile water, then placed on potato dextrose agar (PDA) at 25°C. Hyphal tips were transferred to a fresh plate of PDA and the cultures were examined for morphological characters microscopically. Two isolates were obtained with morphological characteristics of Rhizoctonia solani Kühn. Mycelium was branched at right angles with a septum near the branching point and a slight constriction at the branch base, with 4.22 to 11.28 μm diameter. Colonies were initially white and turned brown with age, exhibited radiation-shaped growth, and produced irregularly shaped, brown sclerotia after 4 days on PDA. Hyphal cells were determined to be multinucleate when stained with 1% safranin O and 3% KOH solution (Bandoni 1979). The internal transcribed spacer (ITS) region of nuclear rDNA was amplified by using the primers ITS4/ITS5 (Cooke and Duncan 1997). The ITS sequences of isolate LY1 (GenBank Accession No. HF948014) and LY2 (HF948015) had 100% sequence identity with R. solani AG-1-IB (DQ173076). Pathogenicity was confirmed by an inoculation test on healthy, potted seedlings of C. lanceolata. The plants were grown in 1-liter pots containing sterile potting mixture of peat, compost, and perlite. Twenty plants were inoculated on the basal stem with a 6-mm-diameter mycelial plug from 3-day-old PDA cultures of each isolate. Twenty plants were mock-inoculated with sterile PDA plugs as control treatment. All plants were covered with plastic bags and maintained at 20 to 25°C for 72 h in a greenhouse. Lesions appeared on the stems and leaves near the ground of all inoculated plants 3 days after inoculation and showed characteristic symptoms after 5 to 7 days as observed in the seedling field; the control plants remained healthy. R. solani was reisolated from infected tissues, and no fungus was isolated from the control plants. The fungus was previously reported on C. lanceolata in Korea (Jeon et al. 2010). To our knowledge, this is the first report of R. solani AG-1-IB causing seedling blight on C. lanceolata in China.References:Bandoni, R. J. 1979. Mycologia 71:873. https://doi.org/10.2307/3759206. Crossref, ISI, Google ScholarCooke, D. E. L., and Duncan, J. M. 1997. Mycol. Res. 101:667. https://doi.org/10.1017/S0953756296003218. Crossref, ISI, Google ScholarJeon, Y. A., et al. 2010. Plant Pathol. J. 26:83. https://doi.org/10.5423/PPJ.2010.26.1.083. Crossref, ISI, Google ScholarDetailsFiguresLiterature CitedRelated Vol. 99, No. 8 August 2015SubscribeISSN:0191-2917e-ISSN:1943-7692 Metrics Article History Issue Date: 6 Aug 2015Published: 23 Jun 2015First Look: 25 Mar 2015Accepted: 15 Mar 2015 Pages: 1182-1182 Information© 2015 The American Phytopathological SocietyCited byThanatephorus cucumeris (many names, depending on host)CABI Compendium, Vol. CABI CompendiumFirst Report of Rhizoctonia solani AG-1-IB Causing Leaf Spot on Peucedanum praeruptorum in ChinaY. Xie, L. Fang, L. Wang, and H. Wang14 June 2018 | Plant Disease, Vol. 102, No. 8" @default.
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- W2085386766 title "Seedling Blight of <i>Codonopsis lanceolata</i> Caused by <i>Rhizoctonia solani</i> AG-1-IB in China" @default.
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