Stimulation of germination of spores of some ectomycorrhizal fungi by other micro-organisms

Ali, Nahia A.; Jackson, R. M.

doi:10.1016/s0953-7562(89)80116-9

Cited by 36 publications

(22 citation statements)

References 12 publications

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“…It has been shown that bacteria can have either positive or negative effects on germination of spores of AM fungi (1,35,37). In several cases positive effects on spore germination and mycorrhiza formation in plants have been attributed to volatile compounds produced by bacteria (30,35).…”

Section: Discussionmentioning

confidence: 99%

Invasion of Spores of the Arbuscular Mycorrhizal Fungus Gigaspora decipiens by Burkholderia spp

Levy

Chang

Abbott³

et al. 2003

Appl Environ Microbiol

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Burkholderia species are bacterial soil inhabitants that are capable of interacting with a variety of eukaryotes, in some cases occupying intracellular habitats. Pathogenic and nonpathogenic Burkholderia spp., including B. vietnamiensis, B. cepacia, and B. pseudomallei, were grown on germinating spores of the arbuscular mycorrhizal fungus Gigaspora decipiens. Spore lysis assays revealed that all Burkholderia spp. tested were able to colonize the interior of G. decipiens spores. Amplification of specific DNA sequences and transmission electron microscopy confirmed the intracellular presence of B. vietnamiensis. Twelve percent of all spores were invaded by B. vietnamiensis, with an average of 1.5 ؋ 10 6 CFU recovered from individual infected spores. Of those spores inoculated with B. pseudomallei, 7% were invaded, with an average of 5.5 ؋ 10 5 CFU recovered from individual infected spores. Scanning electron and fluorescence microscopy provided insights into the morphology of surfaces of spores and hyphae of G. decipiens and the attachment of bacteria. Burkholderia spp. colonized both hyphae and spores, attaching to surfaces in either an end-on or side-on fashion. Adherence of Burkholderia spp. to eukaryotic surfaces also involved the formation of numerous fibrillar structures.

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Section: Discussionmentioning

confidence: 99%

Invasion of Spores of the Arbuscular Mycorrhizal Fungus Gigaspora decipiens by Burkholderia spp

Levy

Chang

Abbott³

et al. 2003

Appl Environ Microbiol

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“…Further studies are needed on the possible enzymic role of these bacteria in helping in the preand post-penetration phases of the fungus. It is also possible that the ' helper bacteria ' assist in a more direct way : they could promote the adhesion of the fungal spores to the leaf surface by providing a mechanical or chemical bridge ; increase the rate of germination (Mosse,1962 ;Ali & Jackson, 1989) ; or promote mycelial growth as MHBs did with the ectomycorrhizal fungus Laccaria laccata (Duponnois, 1992). Some species of Pseudomonas are known to produce siderophores which are important in the establishment of some fungal infections (Slade et al, 1986 ;Swinburne, 1986 ;Fernando et al, 1996) but Brown (1986) found this not to be the case in detached leaf pathogenicity tests with S. nodorum.…”

Section: mentioning

confidence: 99%

Bacteria associated with Stagonospora (Septoria) nodorum increase pathogenicity of the fungus

et al. 1999

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In studies with a laboratory isolate of the fungal pathogen Stagonospora (Septoria) nodorum three different isolates of bacteria were closely associated with the fungus. Bacteria were also closely associated with fresh isolates of S. nodorum obtained from artificially and naturally infected field material. Although a range of bacteria was isolated, only one type of bacterium was found to be associated with each isolate of S. nodorum. In co-inoculation studies with pycnidiospores of the fungus on detached leaves, some of the bacterial isolates significantly increased the pathogenicity of the fungus, particularly Xanthomonas maltophilia, Sphingobacterium multivorum, Enterobacter agglomerans and Erwinia amylovora. Evidence is presented indicating that one of the ways that the ' helper bacteria ' may assist in the establishment of infections is by the production of lipases that were not detected in germinating fungal spores.

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“…In all cases the liquid remained clear and evidently free from bacterial infections. After one year, there was a relatively large mycelium piece and after one and a half year the mycelium filled up the whole liquid Attempts to obtain aseptic cultures have been largely unsuccessful, and only a few synthesis experiments have been carried out (Agerer 1986, Taylor & Alexander 1989, Ali & Jackson 1989, compared with e.g. bolets and Amanita species which grow easily on cultural media.…”

Section: Methods and Resultsmentioning

confidence: 99%

Aseptic culture of slowly growing mycorrhical Russula and Cortinarius species

Hintikka¹,

Niemi²

1999

Karstenia

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Stimulation of germination of spores of some ectomycorrhizal fungi by other micro-organisms

Cited by 36 publications

References 12 publications

Invasion of Spores of the Arbuscular Mycorrhizal Fungus Gigaspora decipiens by Burkholderia spp

Invasion of Spores of the Arbuscular Mycorrhizal Fungus Gigaspora decipiens by Burkholderia spp

Bacteria associated with Stagonospora (Septoria) nodorum increase pathogenicity of the fungus

Aseptic culture of slowly growing mycorrhical Russula and Cortinarius species

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