Müller, Lilian-Lee B. and Zotz, Gerhard and Albach, Dirk C. (2019) Bromeliaceae subfamilies show divergent trends of genome size evolution. Scientific Reports, 9 (1). ISSN 2045-2322

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Abstract

Genome size is known to vary widely across plants. Yet, the evolutionary drivers and consequences of genome size variation across organisms are far from understood. We investigated genome size variation and evolution in two major subfamilies of the Neotropical family Bromeliaceae by determining new genome size values for 83 species, testing phylogenetic signal in genome size variation, and assessing the fit to different evolutionary models. For a subset of epiphytic bromeliad species, we also evaluated the relationship of genome size with thermal traits and relative growth rate (RGR), respectively. Genome size variation in Bromelioideae appears to be evolutionary conserved, while genome size among Tillandsioideae varies considerably, not just due to polyploidy but arguably also due to environmental factors. The subfamilies show fundamental differences in genome size and RGR: Bromelioideae have, on average, lower genome sizes than Tillandsioideae and at the same time exhibit higher RGR. We attribute this to different resource use strategies in the subfamilies. Analyses among subfamilies, however, revealed unexpected positive relationships between RGR and genome size, which might be explained by the nutrient regime during cultivation. Future research should test whether there is indeed a trade-off between genome size and growth efficiency as a function of nutrient supply.

Item Type:	Article
Additional Information:	Publiziert mit Hilfe des DFG-geförderten Open Access-Publikationsfonds der Carl von Ossietzky Universität Oldenburg.
Subjects:	Science and mathematics > Life sciences, biology Science and mathematics > Plants (botany)
Divisions:	Faculty of Mathematics and Science > Department of Biology and Environmental Sciences (IBU)
Date Deposited:	19 Mar 2020 08:04
Last Modified:	19 Mar 2020 08:04
URI:	https://oops.uni-oldenburg.de/id/eprint/4498
URN:	urn:nbn:de:gbv:715-oops-45799
DOI:	10.1038/s41598-019-41474-w
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