Highly polymorphic microsatellite loci in the rice- and maize-infecting fungal pathogen Rhizoctonia solani anastomosis group 1 IA

2008 ◽  
Vol 8 (3) ◽  
pp. 686-689 ◽  
Author(s):  
M. ZALA ◽  
B. A. MCDONALD ◽  
J. BERNARDES DE ASSIS ◽  
M. B. CIAMPI ◽  
M. STORARI ◽  
...  
Keyword(s):  
Rhizoctonia Solani ◽  
Microsatellite Loci ◽  
Fungal Pathogen ◽  
Anastomosis Group ◽  
Polymorphic Microsatellite ◽  
Group 1

scholarly journals Characterization of a New Subgroup of Rhizoctonia solani Anastomosis Group 1 (AG-1-ID), Causal Agent of a Necrotic Leaf Spot on Coffee

2001 ◽  
Vol 91 (11) ◽  
pp. 1054-1061 ◽  
Author(s):  
Achmadi Priyatmojo ◽  
Verma E. Escopalao ◽  
Naomi G. Tangonan ◽  
Cecilia B. Pascual ◽  
Haruhisa Suga ◽  
...  
Keyword(s):  
Rhizoctonia Solani ◽  
Fragment Length Polymorphism ◽  
Hyphal Growth ◽  
Anastomosis Group ◽  
Fatty Acid Profiles ◽  
Pathogenicity Tests ◽  
Necrotic Spots ◽  
Random Amplified Polymorphism Dna ◽  
Group 1

A new foliar disease on coffee leaves was observed in Mindanao, Philippines, in 1996. The symptoms appeared as large circular or irregularly shaped necrotic areas with small circular necrotic spots (1 mm or less in diameter) usually found around the periphery of the large necrotic areas. Rhizoctonia solani was consistently isolated from these diseased coffee leaves. Isolates obtained were multinucleate (3 to 12 nuclei per hyphal cell), had an optimum temperature for hyphal growth at 25°C, prototrophic for thiamine, and anastomosed with tester isolates belonging to R. solani anastomosis group 1 (AG-1). Mature cultures on potato dextrose agar (PDA) were light to dark brown. Sclerotia, light brown to brown, were formed on the surface of PDA and covered the whole mature colony culture. Individual sclerotia often aggregated into large clumps (3 to 8 mm in diameter) and their color was brown to dark brown. In pathogenicity tests, isolates from coffee caused necrotic symptoms on coffee leaves, whereas isolates of AG-1-IA (not isolated from coffee), 1-IB, and 1-IC did not. The results of analyses of restriction fragment length polymorphism of ribosomal DNA internal transcribed spacer, random amplified polymorphism DNA, and fatty acid profiles showed that R. solani isolates from coffee are a population of AG-1 different from AG-1-IA, 1-IB, and 1-IC. These results suggest that R. solani isolates from coffee represent a new subgroup distinct from AG-1-IA, 1-IB, and 1-IC. A new subgroup ID (AG-1-ID) is proposed.

Nuclear Behavior in Homokaryotic and Heterokaryotic Fruiting of Thanatephorus cucumeris (Rhizoctonia Solani) Anastomosis Group 1, Subgroup IC

Mycologia ◽  
1997 ◽  
Vol 89 (3) ◽  
pp. 361 ◽  
Author(s):  
Maria C. Julian ◽  
Annette M. Dullemans ◽  
Cor H. van Silfhout ◽  
Jaap Keijer
Keyword(s):  
Rhizoctonia Solani ◽  
Anastomosis Group ◽  
Thanatephorus Cucumeris ◽  
Nuclear Behavior ◽  
Group 1

scholarly journals First Report of Web Blight on Verbena Caused by Rhizoctonia solani

Plant Disease ◽  
2000 ◽  
Vol 84 (4) ◽  
pp. 492-492 ◽  
Author(s):  
G. E. Holcomb ◽  
D. E. Carling
Keyword(s):  
Rhizoctonia Solani ◽  
Fungal Pathogen ◽  
Baton Rouge ◽  
Anastomosis Group ◽  
First Report ◽  
Foliage Blight ◽  
Pathogenicity Tests ◽  
Stem Lesions ◽  
Web Blight ◽  
Branch Death

Web blight was observed on verbena (Verbena × hybrida) during July 1999 in a cultivar trial planting at Burden Research Plantation in Baton Rouge, LA. Foliage blight, stem lesions, and branch death were common symptoms on 12 of 24 cultivars in the trial. Plant death occurred in cvs. Babylon Florena (one of four plants), Purple Princess (two of four plants), and Taylortown Red (two of four plants). Isolations from infected leaves and stems on acidified water agar consistently yielded a fungus with the mycelial and cultural characteristics of Rhizoctonia solani. Pathogenicity tests were carried out by placing 5-day-old fungal mycelial plugs, grown on acidified potato dextrose agar, at the base of healthy verbena stems and holding plants in a dew chamber at 26°C. After 3 days, foliage blight and stem lesions appeared on inoculated plants, and plants were moved to a greenhouse where temperatures ranged from 23 to 32°C. Seven of nine inoculated plants died after 7 days; noninoculated plants remained healthy. The fungal pathogen was reisolated from all inoculated plants. The fungus was identified as R. solani anastomosis group (AG)-1 IB based on multinucleate condition, type of sclerotia produced, and ability to anastomose with R. solani tester isolates of AG-1 IB. This is the first report of web blight on verbena.

scholarly journals Draft Genome Sequence of Rhizoctonia solani Anastomosis Group 1 Subgroup 1A Strain 1802/KB Isolated from Rice

2017 ◽  
Vol 5 (43) ◽  
Author(s):  
Kalaivani Nadarajah ◽  
Nurhani Mat Razali ◽  
Boon Huat Cheah ◽  
Nur Syafiqah Sahruna ◽  
Ismanizan Ismail ◽  
...  
Keyword(s):  
Rhizoctonia Solani ◽  
Genome Sequence ◽  
Rice Variety ◽  
Draft Genome ◽  
Anastomosis Group ◽  
Sheath Blight ◽  
Draft Genome Sequence ◽  
Content Type ◽  
Group 1

ABSTRACT Sheath blight, caused by Rhizoctonia solani anastomosis group 1 subgroup 1A (AG1-1A), is one of the most devastating rice diseases worldwide. Here, we report the draft genome sequence of R. solani AG1-1A strain 1802/KB isolated from a popular Malaysian rice variety. To the best of our knowledge, this is the second reported representative genome from AG1-1A.

scholarly journals Divergence Between Sympatric Rice- and Soybean-Infecting Populations of Rhizoctonia solani Anastomosis Group-1 IA

2008 ◽  
Vol 98 (12) ◽  
pp. 1326-1333 ◽  
Author(s):  
Joana Bernardes de Assis ◽  
Patrik Peyer ◽  
Milton C. Rush ◽  
Marcello Zala ◽  
Bruce A. McDonald ◽  
...  
Keyword(s):  
Rhizoctonia Solani ◽  
Anastomosis Group ◽  
Sheath Blight ◽  
Host Specialization ◽  
Rice Sheath Blight ◽  
Sympatric Populations ◽  
Migration Patterns ◽  
Hardy Weinberg Equilibrium ◽  
Internal Transcribed Spacer Rdna ◽  
Group 1

Rhizoctonia solani anastomosis group (AG)-1 IA causes soybean foliar blighting (aerial blight) and rice sheath blight diseases. Although taxonomically related within the AG-1 complex, sister populations of R. solani AG-1 IA infecting Poaceae (rice) and Fabaceae (soybean) are genetically distinct based on internal transcribed spacer rDNA. However, there is currently no information available regarding the extent of genetic differentiation and host specialization between rice- and soybean-infecting populations of R. solani AG-1 IA. We used 10 microsatellite loci to compare sympatric R. solani AG-1 IA populations infecting rice and soybeans in Louisiana and one allopatric rice-infecting population from Texas. None of the 154 multilocus genotypes found among the 223 isolates were shared among the three populations. Partitioning of genetic diversity showed significant differentiation among sympatric populations from different host species (ΦST = 0.39 to 0.41). Historical migration patterns between sympatric rice- and soybean-infecting populations from Louisiana were asymmetrical. Rice- and soybean-derived isolates of R. solani AG-1 IA were able to infect both rice and soybean, but were significantly more aggressive on their host of origin, consistent with host specialization. The soybean-infecting population from Louisiana was more clonal than the sympatric rice-infecting population. Most of the loci in the soybean-infecting populations were out of Hardy-Weinberg equilibrium (HWE), but the sympatric rice-infecting population from Louisiana was mainly in HWE. All populations presented evidence for a mixed reproductive system.

scholarly journals Genome Sequence of Rhizoctonia solani Anastomosis Group 4 Strain Rhs4ca, a Wide Spread Pathomycete in Field Crops

2021 ◽  
Author(s):  
Zhengkun Zhang ◽  
Xinyao Xia ◽  
Qian Du ◽  
Lei Xia ◽  
Xiaoyu Ma ◽  
...  
Keyword(s):  
Rhizoctonia Solani ◽  
Fungal Pathogen ◽  
Complete Genome ◽  
Pathogenic Fungus ◽  
Anastomosis Group ◽  
Sequencing Data ◽  
Carbohydrate Active Enzymes ◽  
Group 4 ◽  
Long Read ◽  
Non Coding Rnas

Rhizoctonia solani is an important soil-borne fungal pathogen that causes serious diseases on multiple agricultural crops and vegetables. Here, we report a complete genome assembly of R. solani AG4 (Assembly: 45.47 Mb; contig N50: 1.56 Mb), using a combination of Illumina pare-end and Pacbio long-read sequencing data. A total of 267 non-coding RNAs and 11,592 genes were predicted which contained 109 genes associated carbohydrate-active enzymes and 2,488 genes involved host-pathogen interactions. The complete genome lays a valuable foundation for studying the interactions between host plants and pathogenic fungus and for searching potential` antimicrobial targets.

Nuclear behavior in homokaryotic and heterokaryotic fruiting ofThanatephorus cucumeris(Rhizoctonia solani) anastomosis group 1, subgroup IC

Mycologia ◽  
1997 ◽  
Vol 89 (3) ◽  
pp. 361-374 ◽  
Author(s):  
Maria C. Julian ◽  
Annette M. Dullemans ◽  
Cor H. van Silfhout ◽  
Jaap Keijer
Keyword(s):  
Rhizoctonia Solani ◽  
Anastomosis Group ◽  
Nuclear Behavior ◽  
Group 1
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