Phenotypic plasticity and evolutionary potential in somatic cells of Armillaria gallica

Peabody, Diane Cope; Peabody, Robert B.; Tyrrell, Maura Geens; Towle, Matthew; Johnson, Elizabeth

doi:10.1017/s0953756203007433

Cited by 9 publications

(7 citation statements)

References 20 publications

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“…the capacity to retain genotypes for multiple testing in different environments), (ii) the phenotypic reversibility of the same culture over time and after sequential culturing, (iii) the ability to use fungal species in evolutionary studies, either by selection experiments (Scheiner 2002) or in comparative tests of adaptive roles and (iv) the fact that many fungi have indeterminate growth and thus provide the opportunity to study the function of genetic mosaics and the utility of dynamic boundaries (Peabody et al 2003).…”

Section: Methodsmentioning

confidence: 99%

“…Experimental investigations of basic environmental signals, such as temperature, nutrients, pH, osmotic pressure, water potential, light and their interactions, also are possible (Wickerham and Kurtzman 1975;Hallsworth and Magan 1996;Peabody et al 2003Peabody et al , 2005Bago et al 2004). In addition complex signals, such as those that are involved in symbiotic associations, host immune mechanisms, virulence, pathogenesis and antigen-antibody interaction (i.e.…”

Section: Methodsmentioning

confidence: 99%

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Phenotypic plasticity in fungi: a review with observations onAureobasidium pullulans

2009

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Phenotypic plasticity in fungi is reviewed in the context of observations on phenotypic changes in the colony morphology of the fungus Aureobasidium pullulans. The variation in colony form is shown to depend on (i) the types of single carbon substrates (sugars and sugar alcohols) used in the growth medium, (ii) colony age, (iii) incubation temperature, (iv) light cycle and (v) substrate type. Expanding colonies grow in a developmental sequence that show synchronize growth phase shifts as well as unusual transitions from homogeneous to sectored, yeast to mycelial and giant to microcolonial growth forms. Epigenetic influences on phenotypic switches are suggested to be potential causes of form changes. The desirable properties of a model organism for studying phenotypic plasticity are discussed and past work on the yeast-mycelial transition of fungi is reviewed.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Phenotypic plasticity in fungi: a review with observations onAureobasidium pullulans

2009

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“…Although there is evidence supporting genomic stability among individuals within the same population of A. gallica (Smith et al, 1992;Hodnett and Anderson, 2000), a recent discussion focused on adaptation strategies implemented by this species to face external changes over long periods of time and large areas. Somatic hyphae of A. gallica were lately found subject to a phenomenon known as genetic mosaicism, based on a frequent and regular genetic recombination owing to extrabasidial haploidizations, thus increasing variability and heterogeneity within individuals and, consequently, enabling the fungus to escape unfavourable environmental variations and stress conditions (Peabody et al, 2000(Peabody et al, , 2003(Peabody et al, , 2005. If these findings are exclusive for A. gallica, they could explain why the results of RAPD analysis here reported did not match the VC groups of isolates previously obtained from the same population of this species.…”

Section: Intraspecific Variability In Armillaria Gallicamentioning

confidence: 99%

Genetic Diversity within an Italian Population of Forest Armillaria gallica Isolates as Assessed by RAPD‐PCR Analysis

Gatto¹,

Sicoli²,

Luisi³

2009

Journal of Phytopathology

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The genus Armillaria includes harmful fungal pathogens that cause root rot and wood decay in a broad range of host plants throughout the world. The aim of this study was to detect, by means of Random amplified polymorphic DNA-polymerase chain reaction (RAPD-PCR) markers, the level of intraspecific variability within isolates of an Armillaria gallica population sampled from a Quercus spp. stand located in Gravina in Puglia, southern Italy. UPGMA cluster analysis of RAPD profiles generated by decamer primers grouped the isolates in subclusters demonstrating relatively low intraspecific genetic variability. Moreover, RAPD pattern analysis yielded clusters which did not correspond to the groups discriminated by vegetative compatibility tests performed by a previous investigation on the same population. The findings of this research pose the question of whether somatic incompatibility, which involves an undefined number of genes and alleles per gene, might still be considered an effective tool for the epidemiological studies of A. gallica, whereas molecular analyses are more useful for assessing genomic variation within the species.

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“…Commonly, this circumstance gives rise to unique, variable individuals that preserve or not, in different degrees, phenotypic features specific to the species. Hence, one of the mechanisms leading to contingent phenotypic variation is ontogenetic phenotypic plasticity of somatic cells (also called developmental phenotypic plasticity) [2]. …”

Section: Introductionmentioning

confidence: 99%

Speciation, Phenotypic Variation and Plasticity: What Can Endocrine Disruptors Tell Us?

Ayala-García

Guevara

Marcos-Camacho

et al. 2013

International Journal of Endocrinology

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Phenotype variability, phenotypic plasticity, and the inheritance of phenotypic traits constitute the fundamental ground of processes such as individuation, individual and species adaptation and ultimately speciation. Even though traditional evolutionary thinking relies on genetic mutations as the main source of intra- and interspecies phenotypic variability, recent studies suggest that the epigenetic modulation of gene transcription and translation, epigenetic memory, and epigenetic inheritance are by far the most frequent reliable sources of transgenerational variability among viable individuals within and across organismal species. Therefore, individuation and speciation should be considered as nonmutational epigenetic phenomena.

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Phenotypic plasticity and evolutionary potential in somatic cells of Armillaria gallica

Cited by 9 publications

References 20 publications

Phenotypic plasticity in fungi: a review with observations onAureobasidium pullulans

Phenotypic plasticity in fungi: a review with observations onAureobasidium pullulans

Genetic Diversity within an Italian Population of Forest Armillaria gallica Isolates as Assessed by RAPD‐PCR Analysis

Speciation, Phenotypic Variation and Plasticity: What Can Endocrine Disruptors Tell Us?

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