Biocontrol potential of Waitea circinata, an orchid mycorrhizal fungus, against the rice blast fungus

Carvalho, Jacqueline Campos Borba de; Sousa, Kellen Cristhina Inácio; Brito, Denise Candini de; Chaibub, Amanda Abdallah; Luzini, Aline P.; Cortes, Marcio Vinicius de Carvalho Barros; Filippi, Marta Cristina Corsi de; Kato, Lucília; Vaz, Boniek G.; Costa, Helber B.; Romão, Wanderson; Araújo, Leila Garcês de

doi:10.1007/s40858-015-0042-8

Cited by 14 publications

(22 citation statements)

References 20 publications

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“…verrucaria causes stem necrosis and leaf spot in tomato [ 60 ]. Waitea circinata is an orchid myccorhizal fungus and inhibits the growth of Magnaporthe oryzae causing rice blast [ 61 ]. Several of the root-associated fungi identified by us belong to the group of latent pathogens.…”

Section: Discussionmentioning

confidence: 99%

Changes in root-associated fungal communities in Triticum aestivum ssp. spelta L. and Triticum aestivum ssp. vulgare L. under drought stress and in various soil processing

et al. 2020

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Plant roots are inhabited by an enormous variety of microorganisms, including fungi, which can control the growth as well as regulate the health of the host plants. The mycobiome composition of the roots of wheat plants, especially spelt, under drought stress has been rarely investigated. Therefore, the aim of the present study was to examine the composition of fungal communities in the root endosphere and rhizosphere of three Triticum aestivum ssp. spelta L. cultivars and one Triticum aestivum ssp. vulgare L. cultivar, grown under drought and controlled conditions in different soil preparations. Culture-dependent fungal community profiling was performed to examine the impact of rhizocompartments (endosphere, rhizosphere), host genotype, watering status and different soil preparation on roots mycobiome structure. A total of 117 fungal strains, belonging to 22 genera, were found to colonize the internal and external parts of roots in T. aestivum ssp. spelta L. and T. aestivum ssp. vulgare L. cultivars. The results showed that the part of root and soil preparation type significantly determined the mycobiome composition of wheat roots.

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Section: Discussionmentioning

confidence: 99%

Changes in root-associated fungal communities in Triticum aestivum ssp. spelta L. and Triticum aestivum ssp. vulgare L. under drought stress and in various soil processing

et al. 2020

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“…Additionally, mycorrhizal associations can also suppress biotic agents, such as plant pathogens (Peterson et al 2004;Rasmussen & Rasmussen 2009). OMFs induced resistance in rice plants to pathogenic soil fungal (Mosquera-Espinosa et al 2013) and our isolate En07 (W. circinata) demonstrated potential as biocontrol agent against Magnaphorte oryzae, a rice blast pathogen (Carvalho et al 2015).…”

Section: Discussionmentioning

confidence: 74%

Seed germination and development of orchid seedlings (Cyrtopodium saintlegerianum) with fungi

et al. 2019

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Fungi of Rhizoctonia complex are mycorrhizal of orchids and may to germinate yours seeds and development the seedlings. In this context, our objective was to select a fungal isolate to promote seed germination and seedling development of Cyrtopodium saintlegerianum. Pelotons were found in the roots and three mycorrhizal fungi were isolated. We tested mycorrhizal isolates obtained from C. saintlegerianum roots and six mycorrhizal fungi from other orchids as well three pathogenic isolates (of rice and bean) to germinate the seeds in oatmeal-agar medium. Seeds not inoculated were used as control. The isolates En07 (Waitea circinata), Cs10 (Tulasnella sp.) and Ro88 (Rhizoctonia oryzae) were efficient to promote seed germination, but only En07 differing statistically of the control. The non-specific isolate En07 promoted germination in 81% of seeds and the specific isolate (Cs10) promoted 60%, evidencing the non-specificity mycorrhizal association in this orchid during germination. Axenic seedlings were inoculated with four mycorrhizal fungi (non-inoculated seedlings - control). After six months, the isolates En07 and Cs10 were efficient in the interaction with the seedlings, but did not differ to the control. Therefore, our results suggested that fungi of the Rhizoctonia complex can be used in the germination and seedling development of C. saintlegerianum.

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“…Probably, this metabolite secretion inhibited the production of melanin by P. oryzae colonies, when they were submitted to treatments with endophytic isolates. Under natural conditions, P. oryzae needs melanin for activation of pathogenicity mechanisms (Carvalho et al 2015;Oses-Ruiz et al 2017). Therefore, further in vivo research should be performed to confirm the antagonistic potential of the isolates of the present study.…”

Section: Discussionmentioning

confidence: 81%

Isolation, identification and characterization of endophytic fungi of Bambusa oldhamii munro applied as antagonists to Pyricularia oryzae

et al. 2020

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Isolation, identification and characterization of endophytic fungi of Bambusa oldhamii munro applied as antagonists to Pyricularia oryzae 1 Endophytic fungi, in addition to improving plant development, may produce antimicrobial substances that can inhibit pathogens. The objective of this study was to isolate and characterize endophytic fungi of Bambusa oldhamii and evaluate in vitro antagonism to Pyricularia oryzae. Fungal isolates of B. oldhamii shoots were purified and identified by nuclear ribosomal DNA (nrDNA) including internal transcribed spacer regions (ITS1 and ITS4). These isolates were then confirmed by phylogenetic analysis of the ITS1 and ITS2 sequences and morphological analysis. The isolates were evaluated in in vitro experiments of direct and indirect antagonism (volatile production). Five fungal isolates were identified and named as follows: isolate 27 (Arthrinium sp.); isolate 29 (Acrocalymma sp.); isolate 122 (Botryobambusa fusicoccum); isolate 711 (Phoma sp.) and isolate 712 (Phoma sp.). We found that the area of the P. oryzae colony was reduced by more than 80% by all endophytic isolates in this study, with emphasis on isolate 122, with a 96% reduction in area of the P. oryzae. These results were considered promising and will serve as a foundation for future studies on induction of resistance to P. oryzae.

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Biocontrol potential of Waitea circinata, an orchid mycorrhizal fungus, against the rice blast fungus

Cited by 14 publications

References 20 publications

Changes in root-associated fungal communities in Triticum aestivum ssp. spelta L. and Triticum aestivum ssp. vulgare L. under drought stress and in various soil processing

Changes in root-associated fungal communities in Triticum aestivum ssp. spelta L. and Triticum aestivum ssp. vulgare L. under drought stress and in various soil processing

Seed germination and development of orchid seedlings (Cyrtopodium saintlegerianum) with fungi

Isolation, identification and characterization of endophytic fungi of Bambusa oldhamii munro applied as antagonists to Pyricularia oryzae

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