Haploid vegetative mycelia of Armillaria gallica show among-cell-line variation for growth and phenotypic plasticity
| Autor: | Richard P. Howdy, Maura Geens Tyrrell, Diane Cope Peabody, Robert B. Peabody, Emily Edenburn-MacQueen, Kevin M. Semelrath |
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| Rok vydání: | 2005 |
| Předmět: |
Physiology
Quantitative Trait Loci Haploidy Armillaria gallica Genetic variation Botany Genetics Selection Genetic Molecular Biology Ecology Evolution Behavior and Systematics Mycelium Recombination Genetic Phenotypic plasticity biology Armillaria fungi Genetic Variation Cell Biology General Medicine biology.organism_classification Spore Phenotype Basidiocarp Ploidy Agaricales |
| Zdroj: | Mycologia. 97:777-787 |
| ISSN: | 1557-2536 0027-5514 |
| DOI: | 10.3852/mycologia.97.4.777 |
| Popis: | Vegetative mycelial cells of Armillaria are expected to have diploid nuclei. Cells from a single mycelium therefore would not be expected to differ from one another for ecologically relevant quantita- tive traits. We isolated two sets of basidiome cell lines (from spores and stipe cells) and one set of vegetative cell lines (from an attached rhizomorph) from a sin- gle contiguous Armillaria gallica mycelium. We iso- lated a second set of vegetative cell lines from the soil 20 cm from the above basidiome-rhizomorph com- plex. In all four sets of cell lines in situ DAPI-DNA measurements showed cells are haploid and quanti- tative-trait analyses of cell lines grown at different wa- ter potentials revealed high levels of among-cell-line genetic variation for both growth and phenotypic plasticity. Haploidy and the existence of ecologically relevant genetic variation within vegetative individu- als are unexpected and mean that a process similar to evolutionary adaptation could take place within the soma of a genetic individual. We believe this is a key to understanding how large A. gallica mycelia survive exposure to variation in ecological conditions during lives that potentially span several tree (host) generations. |
| Databáze: | OpenAIRE |
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