Fusarium oxysporum endophytes induced systemic resistance against Radopholus similis on banana

Abstract

Four mutualistic endophytic fungal isolates were investigated for their ability to induce systemic resistance in banana toward the burrowing nematode, Radopholus similis in glasshouse experiments. Two isolates of Fusarium oxysporum and one of F. cf. diversisporum isolated from the cortical tissue of banana, and another isolate of F. oxysporum isolated from tomato, were compared. When the root systems of seedling banana plants were pre-inoculated with the four endophytic fungi, R. similis root penetration was reduced by 29-39% and 22-41% 5 and 15 days after nematode inoculation, respectively. Induction of systemic resistance to R. similis in banana roots by the same endophytic fungi was tested in a split-root system. Depending on the isolate, the penetration rates decreased between 30-38.5% and 26.7-45% after 5 and 15 days in the untreated half of the split-root system of plants treated with the endophytic strains when compared to those treated without the fungi. This is the first time that systemic resistance induced by a fungal endophyte has been demonstrated in banana.

Fungal root endophytes of tomato from Kenya and their nematode biocontrol potential

“…It can therefore be assumed that the isolates collected in this study either represent generally nonpathogenic strains or that they represent strains pathogenic to plants other than tomato. Nevertheless, inoculation of the FOSC reference strain, Fo162, on various tomato cultivars and other plants, like melon, pepper, Arabidopsis and banana has never resulted in disease development Vu et al 2006;Martinuz et al 2015).…”

“…Fungal root endophytes are a phylogenetically diverse group primarily occurring within the Ascomycota, although some belong to the Basidiomycota. Piriformospora indica (phyllum Basidiomycota) and particular isolates within Trichoderma and Fusarium species (phylum Ascomycota) have been reported to enhance growth of various plant species and to induce resistance to pests like insects and nematodes (Daneshkhah et al 2013;Vu et al 2006). Some research has also revealed positive effects of dark septate endophytes (DSE) which comprise a group of asexual ascomycetes and are characterized by dark melanized septa on plant growth, yield and nutrient uptake (Andrade-Linares et al 2011;Jumpponen 2001).…”

Diversity and Antimicrobial Activity of Endophytic Fungi Associated with the Alpine Plant Saussurea involucrata

“…8) Endophytes protect hosts to some extent against pathogens, [9][10][11] reflecting the production of secondary metabolites, [12][13][14][15][16][17] fungal parasitism, 18) or induction of systemic resistance. 19,20) Since recognizing medicinal plants as a repository of fungal endophytes with novel metabolites of pharmaceutical importance, [21][22][23][24] many studies of species of species composition, relative abundance and associations of endophytic fungi have focused on medicinal plants. [25][26][27] Alpine medicinal plants is challenged by low temperature, a shorter vegetation period, more snow, and harsher conditions by the rising number of weather-related extreme events.…”

Study of the interaction mechanism between Heterodera schachtii and Rhizoctonia solani using a split-pot design on sugar beet

“…It should be distinguished between a direct or indirect interaction of the organisms. Split root experiments were realized according to studies on interactions among soil-borne organisms and induced resistance (Hallmann and Berg, 2006;Khan, 1993;Vu et al, 2006,).…”