Antagonistic potential of a psychrotrophic fungus: Trichoderma velutinum ACR-P1

Sharma, Richa; Magotra, Ankita; Manhas, Ravi Singh; Chaubey, Asha

doi:10.1016/j.biocontrol.2017.08.024

Cited by 15 publications

(8 citation statements)

References 40 publications

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“…T. velutinum is a relatively new taxon of Trichoderma identified only in 2003 (Bissett et al, 2003). While this species has been reported to have good biocontrol potential (Matarese et al, 2012; Sharma et al, 2017), our results identified T. velutinum as a comparably low SQT emitter. Only few (3) SQTs at low emission rates were detected from axenic cultures of T. velutinum .…”

Section: Discussioncontrasting

confidence: 50%

“…In our study, T. harzianum and T. hamatum showed antagonistic behavior against L. bicolor in DC, whereas the low VOC emitter T. velutinum was least antagonistic against the mycorrhizal fungus. Still, T. velutinum was already shown to be very effective against several plant-pathogenic microbes (Matarese et al, 2012; Sharma et al, 2017). Should it be able to grow concomitantly with other plant beneficial fungi, the use of this species might be highly advantageous in biocontrol.…”

Section: Discussionmentioning

confidence: 99%

“…So far, no information exists on VOCs of T. hamatum or T. velutinum , whereas the previous studies on T. harzianum VOCs showed high discrepancies (Wheatley et al, 1997; Hung et al, 2013; Siddiquee, 2014; see also discussion). All three species are known mycoparasites on phytopathogenic fungi (Hung et al, 2013; Sharma et al, 2017), but so far, no studies have analyzed their performance in presence of other mutualistic fungi. Laccaria bicolor is an ectomycorrhizal fungus found throughout the temperate zones of the world and forms a symbiosis with several conifer roots (Courty et al, 2009) as well as, e.g., with Populus spp.…”

Section: Introductionmentioning

confidence: 99%

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Trichoderma Species Differ in Their Volatile Profiles and in Antagonism Toward Ectomycorrhiza Laccaria bicolor

et al. 2019

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Fungi of the genus Trichoderma are economically important due to their plant growth- and performance-promoting effects, such as improved nutrient supply, mycoparasitism of plant-pathogens and priming of plant defense. Due to their mycotrophic lifestyle, however, they might also be antagonistic to other plant-beneficial fungi, such as mycorrhiza-forming species. Trichoderma spp. release a high diversity of volatile organic compounds (VOCs), which likely play a decisive role in the inter-species communication. It has been shown that Trichoderma VOCs can inhibit growth of some plant pathogens, but their inhibition potentials during early interactions with mutualistic fungi remain unknown. Laccaria bicolor is a common ectomycorrhizal fungus which in symbiotic relationship is well known to facilitate plant performance. Here, we investigated the VOC profiles of three strains of Trichoderma species, Trichoderma harzianum, Trichoderma Hamatum , and Trichoderma velutinum , as well as L. bicolor by stir bar sorptive extraction and gas chromatography – mass spectrometry (SBSE-GC-MS). We further examined the fungal performance and the VOC emission profiles during confrontation of the Trichoderma species with L. bicolor in different co-cultivation scenarios. The VOC profiles of the three Trichoderma species were highly species-dependent. T. harzianum was the strongest VOC emitter with the most diverse compound pattern, followed by T. hamatum and T. velutinum . Co-cultivation of Trichoderma spp. and L. bicolor altered the VOC emission patterns dramatically in some scenarios. The co-cultivations also revealed contact degree-dependent inhibition of one of the fungal partners. Trichoderma growth was at least partially inhibited when sharing the same headspace with L. bicolor . In direct contact between both mycelia, however, L. bicolor growth was impaired, indicating that Trichoderma and L. bicolor apply different effectors when defending their territory. Multivariate analysis demonstrated that all examined individual fungal species in axenic cultures, as well as their co-cultivations were characterized by a distinct VOC emission pattern. The results underline the importance of VOCs in fungal interactions and reveal unexpected adjustability of the VOC emissions according to the specific biotic environments.

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Section: Discussioncontrasting

confidence: 50%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Trichoderma Species Differ in Their Volatile Profiles and in Antagonism Toward Ectomycorrhiza Laccaria bicolor

et al. 2019

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“…In this context, the strain LBM 120 grew profusely on dual culture assays to inhibit growth of the six phytopathogens and produced hydrolytic enzymes, mainly chitinases, endoglucanases, and proteases, along with diffusible and volatile metabolites with the potential to destabilise the membrane systems. Similar results were demonstrated by Sharma et al (2017) in antagonism assays between T. velutinum ACR-P1 and several phytopathogens.…”

Section: Discussionsupporting

confidence: 84%

Trichodermaspp. from Misiones, Argentina: effective fungi to promote plant growth of the regional cropIlex paraguariensisSt. Hil

et al. 2019

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Ilex paraguariensis St. Hil (yerba mate) is an important crop in the north of Argentina, mainly in Misiones province. The application of Trichoderma as a biocontroller and biofertilizer can replace or reduce the use of agrochemicals, decreasing the negative ecological impact. In this research, we evaluated in vitro and in vivo antagonistic and plant growth promoting (PGP) properties of Trichoderma species isolated from different regions of Misiones province. Dual culture assays of Trichoderma against phytopathogenic fungi associated with yerba mate showed that T. stilbohypoxyli LBM 120 was the most effective antagonist, inhibiting in more than 75% all phytopathogen growth. Trichoderma atroviride LBM 112 and T. stilbohypoxyli LBM 120 were positive on endoglucanase, protease, chitinase, siderophore production, and phosphate solubilisation showed the best biological control agents and PGP properties. The PGP properties of Trichoderma spp. evaluated in vivo on yerba mate seedlings showed that T. atroviride LBM 112, T. stilbohypoxyli LBM 120, and T. koningiopsis LBM 219 enhanced plant dry weight over 47% in total and 24% in the aerial part. Moreover, T. koningiopsis LBM 219 increased root dry weight 25% in contrast with in vitro controls. In conclusion, native Trichoderma strains could be a sustainable solution to improve yerba mate yield.

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“…Aspergillus, Colletotrichum, Fusarium, Verticillium, entre otros (Sharma et al, 2017). A continuación, se mencionan algunas características y enfermedades causadas por algunos de estos géneros.…”

Section: Características Molecularesunclassified

Selección y caracterización de microorganismos con capacidad antifúngica y fertilizante aislados de la rizosfera de plantas de yerba mate de la provincia de Misiones para su aplicación como promotores del crecimiento vegetal

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Argentina es el principal productor y exportador mundial de yerba mate y la mayor producción se concentra en la provincia de Misiones. Las plantas de yerba mate se caracterizan por tener un extenso período de germinación y por la necesidad de adaptarse gradualmente a las condiciones ambientales (rustificación) antes de pasar desde el vivero al campo. En este largo período en etapa de vivero es donde ocurren muchas enfermedades que son combatidas con el agregado de productos de síntesis química con todo lo que su utilización conlleva. Del vivero, las plantas deben salir en muy buenas condiciones de salud, y deben haber llevado un óptimo crecimiento relacionado, como ocurre con todos los cultivos, a una buena nutrición, para lo cual también es necesario el agregado de fertilizantes de síntesis química. Teniendo en cuenta la importancia del cultivo de yerba mate para la región, la necesidad de disminuir el uso de agroquímicos, y el conocimiento de las bondades de los bioinsumos a base de microorganismos del género Trichoderma aplicados en otros cultivos, este trabajo de Tesis Doctoral se orientó hacia la búsqueda de microorganismos pertenecientes a dicho género que puedan ser utilizados como bioinsumos microbianos para contribuir a la sustentabilidad del cultivo de yerba mate. También se postuló que la rizosfera de yerba mate alberga microorganismos endófitos del género Trichoderma con capacidades de promoción del crecimiento vegetal in vitro, y que pueden ejercer una acción tanto biocontroladora de hongos fitopatógenos del cultivo de yerba mate como biofertilizante. Considerando la escasa investigación sobre patógenos fúngicos causantes de enfermedades en yerba mate también se planteó la búsqueda e identificación de patógenos fúngicos asociados a hoja de estas plantas crecidas en condiciones de vivero, para poder evaluar los aislamientos de Trichoderma obtenidos en relación a su capacidad biocontroladora de enfermedades propias de la región.

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Antagonistic potential of a psychrotrophic fungus: Trichoderma velutinum ACR-P1

Cited by 15 publications

References 40 publications

Trichoderma Species Differ in Their Volatile Profiles and in Antagonism Toward Ectomycorrhiza Laccaria bicolor

Trichoderma Species Differ in Their Volatile Profiles and in Antagonism Toward Ectomycorrhiza Laccaria bicolor

Trichodermaspp. from Misiones, Argentina: effective fungi to promote plant growth of the regional cropIlex paraguariensisSt. Hil

Selección y caracterización de microorganismos con capacidad antifúngica y fertilizante aislados de la rizosfera de plantas de yerba mate de la provincia de Misiones para su aplicación como promotores del crecimiento vegetal

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