Informace o publikaci

Effect of phosphorus availability on the selection of species with different ploidy levels and genome sizes in a long-term grassland fertilization experiment

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ŠMARDA Petr HEJCMAN Michal BŘEZINOVÁ Alexandra HOROVÁ Lucie STEIGEROVÁ Helena ZEDEK František BUREŠ Petr HEJCMANOVÁ Pavla SCHELLBERG Juergen

Rok publikování 2013
Druh Článek v odborném periodiku
Časopis / Zdroj New Phytologist
Fakulta / Pracoviště MU

Přírodovědecká fakulta

Citace
www odkaz na článek na stránkách časopisu
Doi http://dx.doi.org/10.1111/nph.12399
Obor Botanika
Klíčová slova DNA content; flow cytometry; nutrient limitation; phosphorus; plant primary CSR strategies; polyploid ecology; polyploidy; Rengen Grassland Experiment
Popis Polyploidy and increased genome size are hypothesized to increase organismal nutrient demands, namely of phosphorus (P), which is an essential and abundant component of nucleic acids. Therefore, polyploids and plants with larger genomes are expected to be selectively disadvantaged in P-limited environments. However, this hypothesis has yet to be experimentally tested. We measured the somatic DNA content and ploidy level in 74 vascular plant species in a long-term fertilization experiment. The differences between the fertilizer treatments regarding the DNA content and ploidy level of the established species were tested using phylogeny-based statistics. The percentage and biomass of polyploid species clearly increased with soil P in particular fertilizer treatments, and a similar but weaker trend was observed for the DNA content. These increases were associated with the dominance of competitive life strategy (particularly advantageous in the P-treated plots) in polyploids and the enhanced competitive ability of dominant polyploid grasses at high soil P concentrations, indicating their increased P limitation. Our results verify the hypothesized effect of P availability on the selection of polyploids and plants with increased genome sizes, although the relative contribution of increased P demands vs increased competitiveness as causes of the observed pattern requires further evaluation.
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