Pathogenicity, host specificity and anastomosis groups ofRhizoctonia spp. isolated from soils in Israel

Ichielevich-Auster, Meira; Sneh, B.; Koltin, Y.; Barash, Isaac

doi:10.1007/bf02980887

Cited by 44 publications

(20 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Additional work is required to determine the correct AG of this isolate. The non-pathogenic isolate Rh521 was inaccurately identified previously as an MNR AG 4 isolate (Ichielevich-Auster et al, 1985;Sneh & Ichielevich-Auster, 1998) and, subsequently, as a BNR isolate (Gonzalez et al, 2001(Gonzalez et al, , 2002Salazar et al, 2000). Isolate RU56-8 was inaccurately identified as belonging to AG-P (Sneh & Ichielevich-Auster, 1998).…”

Section: Rhizoctonia Isolatesmentioning

confidence: 92%

“…Infected roots, crowns and petioles were washed in running tap water, surface disinfested in 1% sodium hypochlorite (NaOCl) solution for 1 min, washed twice in sterile water, blotted on paper towels and plated on water agar supplemented with 250 lg ml -1 chloramphenicol (WAcm). Emerging hyphal tips were transferred to potato dextrose agar plates supplemented with 250 lg ml -1 chloramphenicol (PDAcm) as described previously (Ichielevich-Auster, Sneh, Barash, & Koltin, 1985). These isolates were designated as Str#.…”

Section: Rhizoctonia Spp Isolatesmentioning

confidence: 99%

See 1 more Smart Citation

Genetic diversity, anastomosis groups and virulence of Rhizoctonia spp. from strawberry

et al. 2007

View full text Add to dashboard Cite

show abstract

Section: Rhizoctonia Isolatesmentioning

confidence: 92%

Section: Rhizoctonia Spp Isolatesmentioning

confidence: 99%

Genetic diversity, anastomosis groups and virulence of Rhizoctonia spp. from strawberry

et al. 2007

View full text Add to dashboard Cite

show abstract

“…These protective isolates have usually been characterized as avirulent strains of multinucleate R. solani or mostly, binucleate Rhizoctonia (genus Ceratobasidium) isolates. A number of plant diseases caused by different AG of R. solani have been controlled at several scales by this type of biological agent (Castanho and Butler, 1978;Burpee and Goulty, 1984;Ichielevich-Auster et al, 1985;Cardoso and Echandi, 1987;Herr, 1988;Escande and Echandi, 1991;Harris et al, 1993Harris et al, , 1994. Also, protection against other fungal or even bacterial pathogens has been reported.…”

Section: Pathology and Hypovirulence In The Complexmentioning

confidence: 99%

Review. Biology and systematics of the form genus Rhizoctonia

García¹,

Onco

Susan

2006

Span. j. agric. res.

205

View full text Add to dashboard Cite

Members of the form genus Rhizoctonia D.C. are considered as a complex mixture of filamentous fungi, having in common the possession of a non-spored imperfect state, usually referred to as the Rhizoctonia anamorph. The group includes several of the most devastating crop pathogens like Thanatephorus cucumeris (Frank) Donk (anamorph = Rhizoctonia solani Kühn), the majority of orchid mycorrhizal symbionts (mainly belonging to genus Ceratobasidium D.P. Rogers) and a collection of saprotrophic organisms of different systematic placement. The Rhizoctonia anamorph is characterized by several common features present among members of the entire Rhizoctonia species complex. Taxa from the group have been rearranged into several groups of higher fungi, including both Ascomycota and Basidiomycota, and split into several genera, employing criteria such as the analysis and ultrastructural comparison of septal apparatus. Until very recently, classification for some of the groups within the complex has been exclusively based on criteria such as hyphal anastomosis, since other types of diagnostic features are usually scarce in these fungi. Phytopathological studies in the complex have represented the major contingent of contributions in the group, especially in the case of R. solani. Some members of the complex have been reported to be protective isolates against pathogenic members of Rhizoctonia and some other fungal pathogens. This review focuses on the knowledge of several aspects of the species of Rhizcotonia s. lato, such as its current taxonomic placement, the biology and systematics of some groups of the complex, and a revision of the methodologies employed in studying it.Additional key words: Basidiomycetes, biocontrol, Ceratobasidiaceae, Ceratobasidium, fungal diseases, methodology, taxonomy, Thanatephorus. Resumen Biología y Sistemática del género forma RhizoctoniaLos miembros del género forma Rhizoctonia D.C. son considerados como un complejo de hongos filamentosos, presentando en común una fase asexual no productora de esporas, denominada anamorfo tipo Rhizoctonia. El grupo incluye algunos importantes patógenos como Thanatephorus cucumeris (Frank) Donk (anamorfo=Rhizoctonia solani Kühn), la mayoría de especies micorrícicas de orquídeas (principalmente del género Ceratobasidium D.P. Rogers), y algunos taxones de posición taxonómica variada. El anamorfo tipo Rhizoctonia es definido por una serie de características, presentes y comunes en todos los taxones del complejo. Los taxones del grupo han sido distribuidos entre varios grupos de hongos, incluyendo Ascomicetes y Basidiomicetes, y reubicados en varios géneros de ambas clases, empleando criterios de clasificación tales como el análisis y comparación de la ultraestructura del aparato septal. Habitualmente, la clasificación en algunos de los grupos del complejo ha estado basada en la aplicación de criterios tales como la anastomosis hifal, debido a que en este tipo de hongos es escasa la presencia de un número aceptable de caracteres diagnósticos. Los trabajos ...

show abstract

“…In Israel, Ichielevich-Auster et al (1985) showed that AGs 1.2 and 4 were pathogenic to onions whereas AGs 3, 5 and 6 were not. Farrokhi-Nejad et Our results showed that a number of different AGs of R. solani exist in Mallee soils where onions are grown and that some of these are pathogenic to onions.…”

Section: Discussionmentioning

confidence: 96%

Onion stunting in South Australia associated with Rhizoctonia solani AG 8

Wicks

Walker

Pederick

et al. 2010

Australasian Plant Pathol.

View full text Add to dashboard Cite

Patches of stunted onion plants are common within otherwise healthy crops in the "Mallee" region of South Australia. A number of fungi including species of Rhizoctonia, Fusarium, Pyrenochaeta and Pythium were isolated from the roots of stunted plants, but only R. solani anastomosis groups (AG) 2.1 and 8 consistently caused severe stunting when onion seedlings were grown in soil inoculated with these pathogens. High quantities of R. solani AG 8 DNA were associated with soil collected from stunted patches but the pathogen was generally low or absent in soil from healthy areas. DNA of AG 2.1 and 3 were common in onion field soil, but quantities were not correlated with stunted areas. AGs 2.2, 4 and 5 were rarely detected in onion field soil. Nematodes such as Pratylenchus, Paratylenchus, Paratrichodorus and Tylenchorhynchus were extracted from soil and/or onion roots but numbers were generally low and were similar in stunted and healthy areas. Overall these results suggest that onion stunting in South Australia is primarily associated with R. solani AG 8 although interactions with other fungi and/or nematodes may also be involved.

show abstract

Pathogenicity, host specificity and anastomosis groups ofRhizoctonia spp. isolated from soils in Israel

Cited by 44 publications

References 15 publications

Genetic diversity, anastomosis groups and virulence of Rhizoctonia spp. from strawberry

Genetic diversity, anastomosis groups and virulence of Rhizoctonia spp. from strawberry

Review. Biology and systematics of the form genus Rhizoctonia

Onion stunting in South Australia associated with Rhizoctonia solani AG 8

Contact Info

Product

Resources

About