Trichoderma asperellum Strain T34 Controls Fusarium Wilt Disease in Tomato Plants in Soilless Culture Through Competition for Iron

Segarra, Guillem; Casanova, Eva; Avilés, Manuel; Trillas, Isabel

doi:10.1007/s00248-009-9545-5

Cited by 141 publications

(73 citation statements)

References 31 publications

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“…via experiments on Trichoderma-fungal interactions. The competition for iron was indeed shown to be important for control of Fusarium wilt of tomato by Trichoderma asperellum (Segarra et al, 2010). …”

Section: Siderophoresmentioning

confidence: 98%

Secondary metabolism in Trichoderma – a genomic perspective

2012

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Trichoderma spp. are a rich source of secondary metabolites (SMs). The recent publication of the genome sequences of three Trichoderma spp. has revealed a vast repertoire of genes putatively involved in the biosynthesis of SMs, such as non-ribosomal peptides, polyketides, terpenoids and pyrones. Interestingly, the genomes of the mycoparasitic species Trichoderma virens and Trichoderma atroviride are enriched in secondary metabolism-related genes compared with the biomass-degrading Trichoderma reesei: 18 and 18 polyketide synthases compared with 11; 28 and 16 non-ribosomal peptide synthetases compared with 10, respectively. All three species produce a special class of non-ribosomally synthesized peptides known as peptaibols, containing non-proteinogenic amino acids (particularly a-aminoisobutyric acid). In common with other filamentous ascomycetes, Trichoderma spp. may require siderophores (also produced by nonribosomal peptide synthetases) to grow in iron-poor conditions and to compete with their hosts for available iron. Two generalizations can be made about fungal SM genes: they are often found in clusters, and many are not expressed under standard laboratory conditions. This has made it difficult to identify the compounds. Trichoderma, in particular, interacts with other microbes in the soil and with plant roots in the rhizosphere. A detailed metabolomic-genomic study would eventually unravel the roles of many of these SMs in natural ecosystems. Novel genetic tools developed recently, combined with biological understanding of the function of SMs as toxins or signals, should lead to 'awakening' of these 'silent' clusters. Knowledge of the SM repertoire should precede application of Trichoderma strains for biocontrol: some metabolites could be toxic to plants and their consumers, and thus should be avoided. Others could be beneficial, antagonizing pathogens or inducing resistance in crop plants.

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Section: Siderophoresmentioning

confidence: 98%

Secondary metabolism in Trichoderma – a genomic perspective

2012

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“…Trichoderma sequesters Fe by releasing siderophores. This release comprises one of the competition mechanisms between this fungus and pathogenic fungi (Verma et al 2007;Segarra et al 2010). Recently, Trichoderma asperellum T34 (hereafter referred to as T34) was shown to enhance or decrease the uptake of several nutrients by lupin, depending on the properties of the growing medium (de Santiago et al 2009).…”

Section: Introductionmentioning

confidence: 99%

Effect of Trichoderma asperellum strain T34 on iron, copper, manganese, and zinc uptake by wheat grown on a calcareous medium

et al. 2010

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Rhizosphere microbes may enhance nutrient uptake by plants. Here we studied the effect of Trichoderma asperellum inoculation on the uptake of Fe, Cu, Mn, and Zn by wheat (Triticum aestivum L) grown in a calcareous medium. To this end, an experiment involving two factors, namely Fe enrichment (ferrihydrite enrichment and non-enrichment of the growing medium), and inoculation/non-inoculation with Trichoderma asperellum strain T34, was performed twice under the same conditions. The increase in Fe availability as a result of ferrihydrite enrichment did not enhance plant dry matter production. The effect of T34 on the concentration of Fe, Cu, Mn and Zn, and the total amount of Cu, Mn, and Zn in the aerial parts differed depending on the degree of ferrihydrite enrichment. Inoculation with T34 increased Fe concentration in Fe-deficient media, thus revealing a positive effect of this microorganism on Fe nutrition in wheat. However, T34 significantly decreased the concentration and total amount of Cu, Mn, and Zn in the aerial parts, but only in ferrihydrite-enriched medium. This adverse effect of T34 on Cu, Mn, and Zn uptake by wheat plants may have been related to conditions of restricted availability where potential competition for nutrients between microorganisms and plants can be more marked.

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“…em diversas culturas. Em tomateiro, por exemplo, o isolado T34 de T. asperellum protegeu as plantas da ocorrência da murcha de Fusarium através da competição por Ferro (Fe) (SEGARRA et al, 2010).…”

Section: Introductionunclassified

Adubações orgânicas e mineral e controle biológico sobre a incidência de podridões de colmo e produtividade de milho

et al. 2014

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ResumoA expansão da área cultivada com milho (Zea mays L.) e a utilização do plantio direto têm favorecido a incidência de podridões de colmo nessa cultura. O trabalho objetivou avaliar a adubação orgânica e mineral e o tratamento de sementes com Trichoderma spp. sobre a produção de matéria seca (MS) de parte aérea, incidência de podridões de colmo e produtividade de milho. O experimento constituiuse em um fatorial com parcelas subdivididas em faixas, no delineamento blocos casualizados com quatro repetições, sendo os tratamentos de adubação (dejeto líquido de suínos; cama sobreposta de suínos; dejeto líquido de bovinos; adubação mineral e tratamento testemunha) aplicados nas parcelas e o tratamento de sementes (com e sem Trichoderma spp.) nas subparcelas. No estádio de florescimento foram coletadas três plantas de milho por subparcela para a avaliação da produção de MS da parte aérea. No estádio de maturação fisiológica, foi realizada a avaliação da incidência de podridões de colmo e a colheita das espigas para a avaliação da produtividade. Os adubos orgânicos e o mineral aumentaram a produção de MS e a produtividade de milho. Trichoderma spp. aumentou a produção de MS de milho, porém não teve reflexo sobre a produtividade. A incidência de podridões de colmo no milho foi maior nos tratamentos com adubação orgânica e mineral. Adubos orgânicos aumentam a produção de matéria seca de parte aérea e a produtividade de milho e Trichoderma spp. proporciona aumento na produção de matéria seca de parte aérea de milho. Palavras-chave: Zea mays L., dejetos, Trichoderma spp., produtividade, matéria seca, patógenos de solo AbstractThe expansion of area under maize (Zea mays L.) and the use of no tillage have favored the incidence of stalk rot on this crop. The study aimed to evaluate the organic fertilizers and the treatment of corn seeds with Trichoderma spp. on the production of dry matter (DM) of shoot, incidence of stalk rot and corn yield. The experiment consisted in a factorial with split-plot in strips, on the randomized block design with four replicates, and the fertilization treatments (pig slurry; swine deep bedding; cattle slurry;

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Trichoderma asperellum Strain T34 Controls Fusarium Wilt Disease in Tomato Plants in Soilless Culture Through Competition for Iron

Cited by 141 publications

References 31 publications

Secondary metabolism in Trichoderma – a genomic perspective

Secondary metabolism in Trichoderma – a genomic perspective

Effect of Trichoderma asperellum strain T34 on iron, copper, manganese, and zinc uptake by wheat grown on a calcareous medium

Adubações orgânicas e mineral e controle biológico sobre a incidência de podridões de colmo e produtividade de milho

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