Microscopic observation of perfect hyphal fusion in Rhizoctonia solani

McCabe, Patricia M.; Gallagher, Maurice P.; Deacon, J.W.

doi:10.1017/s0953756298007291

Cited by 22 publications

(13 citation statements)

References 5 publications

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“…This suggested that the growth of GHTs towards each other are due to the elicitation of specific diffusible substances in a sequence of signal‐response (de la Providencia et al , 2005). Previous results showed the same phenomenon in Rhizoctonia solani (McCabe et al , 1999) and Neurospora crassa (Hickey et al , 2002). It is well known that AM fungal hyphae are reactive to various molecules even at very low concentrations (e.g.…”

Section: Discussionsupporting

confidence: 74%

Hyphal healing mechanism in the arbuscular mycorrhizal fungiScutellospora reticulataandGlomus clarumdiffers in response to severe physical stress

Providencia

Fernández

Declerck

2007

FEMS Microbiology Letters

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The hyphal healing mechanism (HHM) has been shown to differ between Gigasporaceae and Glomeraceae. However, this process has not been considered under (severe) physical stress conditions. Scutellospora reticulata and Glomus clarum strains were cultured monoxenically. The impact of long distance separating cut extremities of hyphae and of multiple injuries within hyphae on the HHM was monitored. For long distances (>5000 microm) separating cut extremities, hyphae healing was observed in half the cases in S. reticulata and was absent in G. clarum. For multiple-injured hyphae, the HHM was always oriented towards the complete recovery of hyphae integrity in S. reticulata, while in G. clarum, the growing hyphal tips (GHTs) could indifferently reconnect cut sections, by-pass cut sections or develop into the environment. Hyphae behaviour under severe physical stress clearly differentiated S. reticulata from G. clarum, suggesting that both fungi have developed different strategies for colony growth to survive under adverse conditions.

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Section: Discussionsupporting

confidence: 74%

Hyphal healing mechanism in the arbuscular mycorrhizal fungiScutellospora reticulataandGlomus clarumdiffers in response to severe physical stress

Providencia

Fernández

Declerck

2007

FEMS Microbiology Letters

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“…Future work in this area might benefit from using equipment such as time‐lapse and video‐enhanced light microscopy together with some form of image analysis system. Video‐enhanced light microscopy has previously been used for studying nematodes (Wyss & Zunke, 1992) and fungi (McCabe et al ., 1999). The application of image analysis systems could help overcome the problems of quantifying the density of fungal pathogens in regions of nematode damage.…”

Section: Mechanisms Underlying Synergistic Interactionsmentioning

confidence: 99%

Disease complexes involving plant parasitic nematodes and soilborne pathogens

2002

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“…Crossed isolates are indicated in Table 2. Crosses between the incompatible strains must form a blocking reaction, observed by a zone separating strains, but crossing between compatible strains, the inhibition zone is not observed (Nauta & Hoekstra, 1996;James et al, 2004;Aimi et al, 2002;McCabe et al, 1999).…”

Section: Resultsmentioning

confidence: 99%

Genetic variability and vegetative compatibility of Erythricium salmonicolor isolates

Sebastianes

Maki

Andreote

et al. 2007

Sci. agric. (Piracicaba, Braz.)

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The Pink Disease is caused by Erythricium salmonicolor, which attacks broad hosts, such as citrus, coffee, rubber, Eucalyptus spp. and Acacia spp., infecting mainly branches. This disease became a serious problem in Brazil, reducing the citrus production up to 10%. However the genetic diversity and compatibility of the fungus E. salmonicolor from Brazilian citrus plants is not yet evaluated. Therefore, the aims of this study were to evaluate: i) the genetic variability of E. salmonicolor in the São Paulo and Minas Gerais States by the RAPD technique, and ii) the vegetative compatibility between these isolates. After RAPD analysis, six distinct groups were observed without correlation between the isolation site or host species. In the vegetative compatibility test, the contact of fungal hyphae between all evaluated crosses was observed, of which 84% presented hyphal fusion. Although the compatibility between strains was observed, no correlation between RAPD haplotypes and hyphal anastomosis was verified. These results show the importance of future studies on the sexual cycle of E. salmonicolor, since hyphal fusion, which precedes the formation of heterokaryons (sexual and parasexual reproduction) that could be responsible for the genetic variability in this species.

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Microscopic observation of perfect hyphal fusion in Rhizoctonia solani

Cited by 22 publications

References 5 publications

Hyphal healing mechanism in the arbuscular mycorrhizal fungiScutellospora reticulataandGlomus clarumdiffers in response to severe physical stress

Hyphal healing mechanism in the arbuscular mycorrhizal fungiScutellospora reticulataandGlomus clarumdiffers in response to severe physical stress

Disease complexes involving plant parasitic nematodes and soilborne pathogens

Genetic variability and vegetative compatibility of Erythricium salmonicolor isolates

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