Protection of potato from Rhizoctonia canker with binucleate Rhizoctonia fungi

Escande, A. R.; Echandi, E.

doi:10.1111/j.1365-3059.1991.tb02367.x

Cited by 63 publications

(21 citation statements)

References 6 publications

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“…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.

204

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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 ...

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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.

204

View full text Add to dashboard Cite

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“…Biological control of black scurf may also be effected by various nonpathogenic rhizoctonias that compete with pathogenic individuals of R. solani on the surface of tubers or induce host plant resistance (Escande and Echandi, 1991).…”

Section: Biological Control Of Plant Pathogenic Fungimentioning

confidence: 99%

The Ecology and Evolution of Fungal Viruses

Milgroom

Hillman

2011

Studies in Viral Ecology

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“…and Pythium spp. in different plant species such as sugarbeet (Herr, 1988), corn (Pascual et al, 2000), cotton (Jabaji-Hare and Neate, 2005), radish (Sneh et al, 2004), potato (Escande and Echandi, 1991), bean Echandi, 1987a, 1987b), bedding plants (capsicum and celosia) and cucumber (Cubeta and Echandi, 1991;Villajuan-Abgona et al, 1996a), little is known about the mechanism of biological control.…”

Section: Introductionmentioning

confidence: 99%

Mechanism of biological control of Rhizoctonia damping-off of cucumber by a non-pathogenic isolate of binucleate Rhizoctonia

Elsharkawy¹,

Hassan²,

Villajuan-Abgona³

et al. 2014

Afr. J. Biotechnol.

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The interaction of binucleate Rhizoctonia (BNR) anastomosis group (AG)-A isolate W7, Rhizoctonia solani AG-4 and cucumber seedlings were investigated to elucidate the mechanism of biocontrol of Rhizoctonia solani by BNR. Hypocotyls of Cucumis sativus L. cv. Jibai were inoculated with a virulent isolate of R. solani AG-4 isolate C4 and examined with light microscopy and scanning and transmission electron microscopy. The hyphae of the virulent isolate colonized the outer surface of the hypocotyl and penetrated the epidermal and cortical cells to the pith of hypocotyls. The hyphae of a non-pathogenic species of BNR isolate W7 did not penetrate the cortical cells but instead colonized the outer epidermal cells 12 h after inoculation. Accumulation of mucilage occurred on the surface after dense colonization of the hypocotyls surface by the BNR. Observation of the hypocotyls surface pre-inoculated with BNR and challenged inoculated with R. solani showed constricted and deformed hyphae of R. solani, which were prevented to penetrate the epidermal cells. Pre-inoculating of BNR isolate caused profused formation of the mucilage which lysed BNR hyphae and restricted the growth of R. solani. The mucilage was identified as pectic substances. Analysis of pectin contents from dried hypocotyls tissues showed highly methylated pectin with low uronic acid contents in the seedlings inoculated with R. solani and unprotected by BNR while BNR-treated seedlings showed less methylated pectin and high amount of uronic acid. Furthermore, the BNR-inoculated seedlings showed significant (P=0.05) increase in calcium, indicating high amount of wall-bound cations in cell walls. Pectic substances accumulation and increased calcium in the cucumber tissues greatly contributed in the protection of cucumber seedlings against Rhizoctonia damping off by a non-pathogenic species of Rhizoctonia.

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Protection of potato from Rhizoctonia canker with binucleate Rhizoctonia fungi

Cited by 63 publications

References 6 publications

Review. Biology and systematics of the form genus Rhizoctonia

Review. Biology and systematics of the form genus Rhizoctonia

The Ecology and Evolution of Fungal Viruses

Mechanism of biological control of Rhizoctonia damping-off of cucumber by a non-pathogenic isolate of binucleate Rhizoctonia

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