Abstract
The fungus Pochonia chlamydosporia is one of the most studied biological agents used to control plant-parasitic nematodes. This study found that the isolates Pc-3, Pc-10 and Pc-19 of this fungus promote the growth of tomato and lettuce seedlings. The isolate Pc-19 colonized the rhizoplane of tomato seedlings in only 15 days and produced a large quantity of chlamydospores. This isolate was able to use cellulose as a carbon source, in addition to glucose and sucrose. Scanning electron microscopy (SEM) revealed that hyphae of the P. chlamydosporia isolate Pc-10 penetrated the epidermal cells of the tomato roots. These three P. chlamydosporia isolates promote the growth of tomato and lettuce.
Highlights
Pochonia chlamydosporia Zare and Gams is one of the most studied biological agents used to control plant-parasitic nematodes
All isolates of P. chlamydosporia increased the height and the aboveground mass of tomato seedlings in assay 1, when mycelial discs were used as the source of inoculum, and from 72 to 103, and 100 to 148%, respectively, in assay 2, when the fungus was added to the substrate via conidia suspension (Table 2)
Despite the differences between the assays, we concluded that the growth of tomato seedlings was promoted by the P. chlamydosporia var. chlamydosporia isolates, excluding the sole effect of the nutrients from the culture medium (CMA)
Summary
Pochonia chlamydosporia Zare and Gams is one of the most studied biological agents used to control plant-parasitic nematodes. It can produce chlamydospores, which enable it to survive in the soil without additional energy sources (MANZANILLA-LÓPEZ et al, 2013). Depends on rhizosphere colonization (MANZANILLA-LÓPEZ et al, 2013). The P. chlamydosporia fungus can colonize the rhizoplane and the internal tissues of the roots of some plants, in the manner of an endophyte (BORDALLO et al, 2002; ESCUDERO; LOPEZLLORCA, 2012; MACIÁ-VICENTE et al, 2009b; MONFORT et al, 2005). Once inside the root tissues, this antagonistic fungus shares the same niche as root-knot nematodes and is less subject to
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