Influence of inoculation with a Trichoderma bio‐inoculant on ectomycorrhizal colonisation of Pinus radiata seedlings

Abstract

Trichoderma species, through mechanisms such as mycoparasitism, antibiosis, induced resistance and competition, are able to suppress the growth and activity of soil microbes and therefore have the potential to influence ectomycorrhizal (ECM) fungal colonisation. ECM colonisation potential of Pinus radiata seedlings inoculated with the commercially available Trichoderma species bio-inoculant, ArborGuard™, was investigated in a commercial containerised nursery setting and in a separate glasshouse experiment. Application of ArborGuard™ to P. radiata seedlings in both the containerised nursery and glasshouse experiment had no detrimental effect on the ability of the naturally occurring ECM fungi to colonise the seedlings. Thelephora terrestris was the only ECM species colonising the P. radiata root tips in the containerised system while Tomentella ellisii was the dominant species found colonising the P. radiata root tips in the glasshouse experiment. No seedling growth promotion was observed with the addition of ArborGuard™. The results show that the Trichoderma bio-inoculant ArborGuard™ does not affect ECM colonisation of P. radiata seedlings by Th. terrestris and T. ellisii in a containerised nursery system.

The plasticity of fungal interactions

“…Trichoderma asperellum, T. viride, T. harzianum, and T. atroviride are the main species used in biological preparations as effective bio-pesticides against pathogenic Fusarium, Pythium, Phytophthora, Alternaria, Sclerotinia, Botrytis, and others (Regliński et al 2012;Minchin et al 2012). Although their effectiveness has been confirmed (Sierota 1976;Howell 2006;Tucci et al 2011;Patil et al 2012), some authors (e.g., Kredics et al 2003) dispute the unambiguous antagonistic properties of Trichoderma against pathogens.…”

“…According to the biological species concept, a 'species' is defined as one or more groups of interbreeding natural populations that are reproductively isolated from other such groups that occupy a specific ecological niche (Mayr 1942). In such a context, genetic information can be transmitted only within a species.…”

ASSESSMENT ON Trichoderma spp. MIXTURE AS A POTENTIAL BIOCONTROL AGENT OF Ganoderma boninense INFECTED OIL PALM SEEDLINGS

“…In addition, increases in Pinus radiate (coniferous evergreen tree) seedling stem diameter, height and dry weight by 30% in nurseries were reported when treated with Trichoderna spp. mixtures (Minchin et al, 2006).…”

Tomentella (Thelephorales, Basidiomycota) en bosques de Nothofagaceae de Patagonia, Argentina: micorrizas de nuevas especies

“…Posiblemente se trate de especies endémicas ya que hasta el momento no se han encontrado en otras formaciones boscosas donde las especies de Tomentella son abundantes. Por otro lado, Tomentella ellisii podría ser considerada una especie de baja especificidad dado que ha sido reportada como micorrícica de Alnus, Pinus, Quercus, Betula, Castanea y especies del Amazonas (Buscardo et al, 2010;Kunttu, 2016;Malysheva et al, 2016;Menkis et al, 2005;Nouhra et al, 2015;Pritsch et al, 2010;Suvi, 2005;Tedersoo et al, 2009;Yorou & Agerer, 2011), y en viveros forestales (Fernández et al, 2013;Minchin et al, 2012) Todas las EM de Tomentella descriptas en este trabajo corresponden al tipo corta distancia de exploración (Agerer, 2001), similar a otras especies de Tomentella ya descriptas (Jakucs & Erős-Honti, 2008, Jakucs et al, 2015. Se ha interpretado que las características anatómicas de las EM podrían estar relacionadas con su biología y, posiblemente, con funciones en la nutrición de la planta (Agerer & Rambold, 2004-2016.…”