Biodiversity of Trichoderma in Neotropics

Hoyos-Carvajal, Lilliana; Bissett, John

doi:10.5772/23378

Cited by 24 publications

(10 citation statements)

References 58 publications

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“…This is consistent with findings by Kullnig et al (2000) and Kubicek and others (2003), which also identified T. harzianum as the most common species in different geographic regions. T. harzianum, T. asperelloides and T. asperellum have been described as common inhabitants of organic rich soils or poorly degraded plant material (Hoyos-Carvajal and Bissett, 2011), however, our results indicate that these species also grow in arid soils with low organic content such as the soils of the high Andean Mountains.…”

Section: Discussioncontrasting

confidence: 58%

The use of secondary metabolites extracted from Trichoderma for plant growth promotion in the Andean highlands

Ortuño

Castillo

Longa

et al. 2016

Renew. Agric. Food Syst.

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Agriculture in the Altiplano and Andean Mountains is experiencing threats to sustainability mainly due to intensive cultivation of quinoa driven by international markets. This recent export-oriented production system is causing the degradation of soils and reducing productivity, therefore, agro-technological innovations are necessary to sustain cropping systems while maintaining organic quality (mostly quinoa). In this work, we searched for native Trichoderma species associated with plants from the Andean highlands to obtain an environmentally friendly and organic alternative to chemical fertilizers. We obtained different Trichoderma isolates from quinoa, potato and maize roots and soil, which were identified as Trichoderma harzianum, as well as other species. Twelve of the isolates were cultured in pairs to stimulate the production and secretion of compounds of diverse chemical nature that we called collectively ‘secondary metabolites’ (SMs). Crude extracts of SMs were used to inoculate selected crops to determine their plant growth promoting potential compared with two commercially available controls, chemical fertilizer and a bio-fertilizer. Results showed that SMs significantly promoted lettuce and radish growth and increased quinoa grain yield. Indole acetic acid was detected in all SM extracts that promoted plant growth, suggesting that this plant regulator might be responsible for the plant growth promoting activity. In conclusion, the Trichoderma-derived SMs approach appears to be a promising, simple and accessible technology for small-scale farmers in order to insure the sustainability, affordability and accessibility of food production in the Andes.

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Section: Discussioncontrasting

confidence: 58%

The use of secondary metabolites extracted from Trichoderma for plant growth promotion in the Andean highlands

Ortuño

Castillo

Longa

et al. 2016

Renew. Agric. Food Syst.

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“…While a comprehensive worldwide survey of the distribution of Trichoderma species under the current rapidly evolving taxonomic framework does not yet exist, recent re-evaluations of existing international culture collections and new collecting efforts in under-sampled geographical locations have greatly expanded our knowledge. Pertinent to the new species recovered herein, those most closely related to T. azevedoi include T. T. rifaii, T. endophyticum and T. neotropicale, all of which have been reported to have neotropical distributions [23,33,53]. Species most closely related to T. peberdyi include T. ceraceum, first reported from the USA [54] and T. tomentosum, which is probably cosmopolitan (unpublished Genbank strain data).…”

Section: Geographical Distribution Of Trichoderma Species In Garlic Amentioning

confidence: 70%

Trichoderma from Brazilian garlic and onion crop soils and description of two new species: Trichoderma azevedoi and Trichoderma peberdyi

et al. 2020

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Fifty four Trichoderma strains were isolated from soil samples collected from garlic and onion crops in eight different sites in Brazil and were identified using phylogenetic analysis based on combined ITS region, tef1-α, cal, act and rpb2 sequences. The genetic variability of the recovered Trichoderma species was analysed by AFLP and their phenotypic variability determined using MALDI-TOF. The strain clusters from both typing techniques coincided with the taxonomic determinations made from phylogenetic analysis. The phylogenetic analysis showed the occurrence of Trichoderma asperellum, Trichoderma asperelloides, Trichoderma afroharzianum, Trichoderma hamatum, Trichoderma lentiforme, Trichoderma koningiopsis, Trichoderma longibrachiatum and Trichoderma erinaceum, in the soil samples. We also identified and describe two new Trichoderma species, both in the harzianum clade of section Pachybasium, which we have named Trichoderma azevedoi sp. nov. and Trichoderma peberdyi sp. nov. The examined strains of both T. azevedoi (three strains) and T. peberdyi (12 strains) display significant genotypic and phenotypic variability, but form monophyletic clades with strong bootstrap and posterior probability support and are morphologically distinct from their respective most closely related species.

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“…gamsii T6985 (rapidly) was maltitol. The assimilation of this specific polyol, already observed in several Trichoderma spp., may have a role on the ecology of T. gamsii T6085, because it could be used as an indicator of dehydrogenase activity potentially involved in survival when drought conditions occur (Hoyos‐Carvajal & Bissett, 2011).…”

Section: Discussionmentioning

confidence: 99%

A statistical protocol to describe differences among nutrient utilization patterns of Fusarium spp. and Trichoderma gamsii

et al. 2021

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The Biolog phenotype microarrays (PM) system offers a simple and cheap tool to rapidly provide a high throughput of information about the phenotypes of fungal isolates in a short time. In order to improve the use of the PM system in fungal ecology studies, the present work proposes a new statistical protocol based on two approaches, that is, a functional principal components analysis to describe similarity patterns of growth curves, and a Bayesian generalized additive model (GAM) to allow inferences on specific growth features, in order to analyse nutrient fungal utilization in a model system including four causal agents of Fusarium head blight, the natural competitor Fusarium oxysporum, and the beneficial isolate Trichoderma gamsii T6085. Analysis of data collected by the Biolog PM in our biological system showed a different nutritional competitive potential of the four pathogens, as well as an intermediate behaviour of the natural competitor and of our biocontrol agent. This protocol, applicable to different fungal phenotypical studies at both isolate and community level, allows a full exploitation of data obtained by the PM system and provides important information about the nutritional pattern of a single isolate compared to those of other fungi, a key factor to be exploited in biocontrol strategies.

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Biodiversity of Trichoderma in Neotropics

Cited by 24 publications

References 58 publications

The use of secondary metabolites extracted from Trichoderma for plant growth promotion in the Andean highlands

The use of secondary metabolites extracted from Trichoderma for plant growth promotion in the Andean highlands

Trichoderma from Brazilian garlic and onion crop soils and description of two new species: Trichoderma azevedoi and Trichoderma peberdyi

A statistical protocol to describe differences among nutrient utilization patterns of Fusarium spp. and Trichoderma gamsii

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