Phylogenetic relationship between different race representative populations of Fusarium oxysporum f. sp. ciceris in respect of translation elongation factor-1α, β-tubulin, and internal transcribed spacer region genes

2014 ◽  
Vol 196 (6) ◽  
pp. 445-452 ◽  
Author(s):  
Sunil C. Dubey ◽  
Kumari Priyanka ◽  
Vivek Singh
Keyword(s):  
Fusarium Oxysporum ◽  
Phylogenetic Relationship ◽  
Internal Transcribed Spacer ◽  
Elongation Factor ◽  
Translation Elongation Factor ◽  
Internal Transcribed Spacer Region ◽  
Elongation Factor 1Α ◽  
Translation Elongation ◽  
Β Tubulin ◽  
Translation Elongation Factor 1Α

Diaporthe sinensis, a new fungus from Amaranthus sp. in China 

Phytotaxa ◽  
2019 ◽  
Vol 425 (5) ◽  
pp. 259-268
Author(s):  
XIAO-XIAO FENG ◽  
JIA-JIE CHEN ◽  
GUO-RONG WANG ◽  
TING-TING CAO ◽  
YONG-LI ZHENG ◽  
...  
Keyword(s):  
Internal Transcribed Spacer ◽  
Plant Pathogens ◽  
Phylogenetic Analyses ◽  
Elongation Factor ◽  
Fungal Species ◽  
Translation Elongation Factor ◽  
Translation Elongation ◽  
Stems And Leaves ◽  
Elongation Factor 1 ◽  
Β Tubulin

During an exploration of plant pathogens in vegetables occuring in Zhejiang province, China, a novel fungal species, was found. Three strains ZJUP0033-4, ZJUP0038-3 and ZJUP0132 were isolated from black round lesions in the stems and leaves of Amaranthus sp. Phylogenetic analyses based on sequences from four genes including rDNA internal transcribed spacer (ITS), translation elongation factor 1-α (EF1-α), histone (HIS) and β-tubulin (TUB) indicated that D. sinensis clustered in a distinct clade closely related to D. neoarctii, D. angelicae, D. subordinaria, D. arctii, D. cuppatea, D. lusitanicae, D. novem, D. infecunda, D. ganjae and D. manihotia. Morphologically, D. sinensis is distinguished by brown, scattered, globose pycnidia and ellipsoid alpha conidia with bi- to multiguttulate.

scholarly journals First Report of Fusarium Yellows and Rhizome Rot Caused by Fusarium oxysporum f. sp. zingiberi on Ginger in the Continental United States

Plant Disease ◽  
2021 ◽  
Author(s):  
Shilpi Chawla ◽  
Reza A. Rafie ◽  
T. Michael Likins ◽  
Eunice Ndegwa ◽  
Shuxin Ren ◽  
...  
Keyword(s):  
Fusarium Oxysporum ◽  
Elongation Factor ◽  
Pathogenicity Test ◽  
Translation Elongation Factor ◽  
Translation Elongation ◽  
Stunted Growth ◽  
Raised Bed ◽  
The U.S ◽  
Rhizome Rot ◽  
Β Tubulin

Ginger (Zingiber officinale Roscoe) is one of the most widely consumed medicinal herb in the world, and the U.S. imports of ginger have risen in recent years because of its health benefits. Seed rhizome and soilborne diseases are serious concerns of ginger worldwide (Stirling 2004; Moreira et al. 2013), including the recent observations of Fusarium yellows and rhizome rot in the Commonwealth of Virginia. In October 2018 and 2019, ginger plants with yellowing of leaf margins and stunted growth were uprooted from a 9.1 m × 14.6 m high tunnel (HT) and from an outdoor raised bed at Virginia State University’s Randolph farm. Disease incidence in the HT and the raised bed was estimated between 5-70%. Small pieces (2-5 mm) of symptomatic rhizomes were disinfected with 0.6% sodium hypochlorite solution and placed on potato dextrose agar (PDA) Petri plates to recover fungal isolates. Hyphal tips from these isolates were transferred to fresh PDA to obtain pure cultures. The fungal colonies were pinkish-white initially, and turned purplish-pink after 5-7 days of incubation at 25 °C. The microconidia were aseptate, oval or elliptical, hyaline, and measured 5 to 12 × 4 to 6 µm in size. Macroconidia were with 3 to 5 septations, curved like a sickle towards the ventral side, hyaline, smooth and thin-walled, and 15 to 40 × 3 to 6 µm in size. Fungal genomic DNA of one isolate (Gf-VA-3) was extracted from a 7-days old culture using PrepMan®Ultra (Thermo Fischer Scientific, Cheshire UK). Four conserved regions of the isolated pathogen, internal transcribed spacer (ITS), translation elongation factor (EF), β-tubulin (Bt), and calmodulin (cal) gene regions were amplified using ITS1 and ITS4 (White et al. 1990), ef1α and ef2α (O’Donnell et al. 1998), Bt2a and Bt2b (Glass and Donaldson 1995), and calA1 and calQ1 (Carbone and Kohn 1999), respectively. PCR products were sequenced, and amplicons deposited in GenBank with accession numbers MT337417 for ITS, MT436712 for Bt, MT802441 for cal and MW816632 for EF. A 99-100% identity with Fusarium oxysporum was matched with accession nos. MW776326 for ITS, MN646766 for the β-tubulin, MT010904 for the calmodulin and MN258350 for the translation elongation factor genes. For pathogenicity test, six 6-week-old healthy ginger plants grown on sterilized potting mix in the greenhouse were inoculated by injecting 3-ml of a 1 × 108 micro- and macro-conidia suspension per ml at the crown area transcending to the rhizome. Another set of six plants were injected with distilled and autoclaved water in the same way. After four weeks, leaves withered, plants exhibited yellowing and wilt followed by stunted growth and eventually complete collapse of the six inoculated plants, however control plants showed none of the symptoms. The same pathogen was re-isolated from the inoculated plants. The pathogenicity test was repeated, and the same results were observed. Fusarium yellows and rhizome rot has been reported from Hawaii in the U.S. (Trujillo 1963), Brazil (Moreira et al. 2013), Australia (Stirling 2004), China (Li et al. 2014), and India (Shanmugam et al. 2013). To our knowledge, this is the first report of Fusarium yellows and rhizome rot on ginger in the Continental U.S. The disease is seed rhizome and soilborne leading to poor establishment and hence economic loss in ginger production

scholarly journals Muerte descendente de Prunus sp. asociada a Armillaria spp. en huertas comerciales de Michoacán, México

2017 ◽  
Vol 35 (3) ◽  
Author(s):  
Patricia Rivas-Valencia ◽  
Alejandra Almaraz-Sánchez ◽  
Adriana Cano-Salgado ◽  
Lervin Hernández-Ramos ◽  
Iobana Alanís-Martínez ◽  
...  
Keyword(s):  
Prunus Persica ◽  
Elongation Factor ◽  
Prunus Domestica ◽  
Translation Elongation Factor ◽  
Elongation Factor 1Α ◽  
Translation Elongation ◽  
Translation Elongation Factor 1Α

<p>El área productora de durazno (<em>Prunus persica</em>) y ciruelo (<em>Prunus domestica</em>) en Michoacán, se localiza en el municipio de Zinapécuaro. Recientemente se han presentado síntomas de un deterioro progresivo de los árboles que les ocasiona la muerte, poniendo en riesgo la producción de fruta. El objetivo de este estudio fue identificar y caracterizar molecularmente el patógeno responsable. En las localidades de Ucareo, Jeráhuaro, Huajúmbaro, San Joaquín y La Galera con antecedentes del problema, se colectaron muestras de raíz, tronco y suelo. Se identificaron signos característicos del hongo <em>Armillaria</em> spp., confirmado por secuenciación molecular del gen Tef-1α (translation elongation factor 1α). El análisis filogenético agrupó las secuencias como dos especies nuevas, filogenéticamente emparentada en el mismo clado que <em>A. mellea</em>, que es una especie patógena agresiva. En México no se cuenta actualmente con portainjertos tolerantes, y por tanto, se recomienda continuar con estudios de búsqueda de resistencia genética y manejo de la enfermedad en las huertas.</p>

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