Trichoderma populations from alkaline agricultural soil in the Nile valley, Egypt, consist of only two species

Gherbawy, Youssuf A.; Druzhinina, Irina S.; Shaban, Gehan M.; Wuczkowsky, Michael; Yaser, Manal; Elnaghy, Mohamed A.; Prillinger, Hansjörg; Kubicek, Christian P.

doi:10.1007/s11557-006-0091-y

Cited by 44 publications

(31 citation statements)

References 30 publications

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“…Nevertheless, the pH of the soils in the present study varied between 7.23 and 8.23, and T. koningii was abundant in soils with a pH of 7.23 and 7.89. This corroborates the findings of GHERBAWY et al (2004) reporting that Trichoderma was isolated from the Nile Valley soil in Egypt with a pH range of 7.4 to 8.4. In the present study, soil pH was found to have significant influence on the relative abundance of T. koningii but not T. viride.…”

Section: And References Therein) Studies Have Shown That Short-term supporting

confidence: 92%

Influence of crop species and edaphic factors on the distribution and abundance of trichoderma in alfisol soils of southern India

Muniappan¹,

Muthukumar²

2014

Acta Botanica Croatica

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-The effect of crop species and edaphic factors on the distribution of Trichoderma species in Alfisol soil under different agrosystems was evaluated. Each soil sample was assayed for nine abiotic factors and culturable microfungal populations. Fungal abundance was determined by dilution plate technique, and the identification of fungi was based on morphological characteristics. Pearson's correlation coefficient was used to determine the relationship of association between these factors and the presence and abundance of Trichoderma species in each soil type. The abundance of soil fungi ranged between 7.0 × 10 3 and 13.6 × 10 3 colony forming units (cfus) per gram of dry soil. The population densities of the two Trichoderma species (T. koningii and T. viride) isolated in the present study varied significantly with crop species and their abundance (varied from 0.6 to 3.6 × 10 3 cfus g -1 dry soil). Twenty-two other colony-forming fungal types with an abundance ranging between 7.0 × 10 3 and 13.6 × 10 3 cfus g -1 dry soil were also isolated in the present study. As soil pH negatively influenced relative abundance of T. koningii, soil P and relative abundance of T. viride were significantly and positively correlated to each other. Further, relative abundance of T. koningii was significantly and positively correlated to relative abundance of Aspergillus fumigatus but negatively correlated to relative abundance of Stachybotrys atra. Likewise, a significant negative correlation existed between relative abundance of T. viride and Absidia glauca.

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Section: And References Therein) Studies Have Shown That Short-term supporting

confidence: 92%

Influence of crop species and edaphic factors on the distribution and abundance of trichoderma in alfisol soils of southern India

Muniappan¹,

Muthukumar²

2014

Acta Botanica Croatica

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“…The use of DNA-based species identification tools has now revised many of these claims, by showing that these species actually are composed of two or more phylogenetic species, each of which displays restricted biogeography (Koufopanou et al, 2001;Geiser et al, 1998;Burt et al, 1996;Kasuga et al, 2003). The global occurrence of Trichoderma was recently investigated in several studies (Kullnig et al, 2000;Kubicek et al, 2003;Wuczkowski et al, 2003;Gherbawy et al, 2004;Druzhinina et al, 2005;Zhang et al, 2005). While these studies revealed the worldwide predominance of some species such as T. harzianum, they also revealed a putative geographic bias for a number of other taxa.…”

Section: Geographic Distribution Of Hypocrea/ Trichodermamentioning

confidence: 99%

Fungal genus Hypocrea/Trichoderma: from barcodes to biodiversity

Kubicek

Komoń-Zelazowska

Druzhinina

2008

J. Zhejiang Univ. Sci. B

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113

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Abstract:Hypocrea/Trichoderma is a genus of soil-borne or wood-decaying fungi containing members important to mankind as producers of industrial enzymes and biocontrol agents against plant pathogens, but also as opportunistic pathogens of immunocompromised humans and animals, while others can cause damage to cultivated mushroom. With the recent advent of a reliable, BarCode-aided identification system for all known taxa of Trichoderma and Hypocrea, it became now possible to study some of the biological fundamentals of the diversity in this fungal genus in more detail. In this article, we will therefore review recent progress in (1) the understanding of the geographic distribution of individual taxa; (2) mechanisms of speciation leading to development of mushroom diseases and facultative human mycoses; and (3) the possible correlation of specific traits of secondary metabolism and molecular phylogeny.

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“…Therefore, published studies on the ecology (Danielson and Davey 1973), enzyme production (Wey et al 1994;Kovacs et al 2004), biocontrol (Kullnig et al 2000), human infection (Gautheret et al 1995), and secondary metabolite formation (Cutler et al 1999;Humphris et al 2002) within Trichoderma are difficult to interpret. Consequently, almost all recent studies have used molecular data to characterize and identify species (Kullnig et al 2000;Kubicek et al 2003;Wuczkowski et al 2003;Gherbawy et al 2004;Chaverri and Samuels 2004). With the accumulation of sequence data in GenBank (see above; Fig.…”

Section: Identification Of Species Based On the Analysis Of Dna Sequementioning

confidence: 99%

The first 100 Trichoderma species characterized by molecular data

2006

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Trichoderma species are generally abundant on decaying wood and in soil because of their success in various heterotrophic interactions, including decomposition, parasitism, and even opportunistic endophytism. Many Trichoderma species or, precisely, many individual Trichoderma strains, have various important applications in industry and human life, which led to the inclusion of Hypocrea jecorina (Trichoderma reesei), the well-known producer of industrial enzymes, in the list of organisms whose genomes have been sequenced. Trichoderma species also have been adopted as agents of biological control of plant pathogenic fungi and as antibiotic producers. Trichoderma longibrachiatum is known as an opportunistic pathogen of immunocompromised mammals, including humans, and some species are common indoor contaminants. Given these properties, correct identification at the species level is highly desirable. However, within the past decade, the number of recognized Trichoderma species has tripled, reaching 100. Therefore, Trichoderma taxonomy and species identification is a difficult issue. The abundant homoplasy in phenetic characters is likely the reason, given that the number of morphologically distinct species is significantly lower than the number of phylogenetically distinct species recognized using methods of gene sequence analysis. In this review, we introduce to the scientific community the development of modern tools for Trichoderma species identification: the oligonucleotide barcode program TrichOKEY version 1.0, and TrichoBLAST, the multilocus database of vouchered sequences powered by a similarity search tool. We also discuss the application of the Genealogic Concordance Phylogenetic Species Recognition approach. In combination, these advances make it possible to identify all known Trichoderma species based on sequence analysis.

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Trichoderma populations from alkaline agricultural soil in the Nile valley, Egypt, consist of only two species

Cited by 44 publications

References 30 publications

Influence of crop species and edaphic factors on the distribution and abundance of trichoderma in alfisol soils of southern India

Influence of crop species and edaphic factors on the distribution and abundance of trichoderma in alfisol soils of southern India

Fungal genus Hypocrea/Trichoderma: from barcodes to biodiversity

The first 100 Trichoderma species characterized by molecular data

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