Taller plants have lower rates of molecular evolution

Robert Lanfear*, Simon Y W Ho, T. Jonathan Davies, Angela T. Moles, Lonnie Aarssen, Nathan G. Swenson, Laura Warman, Amy E. Zanne, Andrew P. Allen

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    125 Citations (Scopus)

    Abstract

    Rates of molecular evolution have a central role in our understanding of many aspects of species' biology. However, the causes of variation in rates of molecular evolution remain poorly understood, particularly in plants. Here we show that height accounts for about one-fifth of the among-lineage rate variation in the chloroplast and nuclear genomes of plants. This relationship holds across 138 families of flowering plants, and when accounting for variation in species richness, temperature, ultraviolet radiation, latitude and growth form. Our observations can be explained by a link between height and rates of genome copying in plants, and we propose a mechanistic hypothesis to account for this - the 'rate of mitosis' hypothesis. This hypothesis has the potential to explain many disparate observations about rates of molecular evolution across the tree of life. Our results have implications for understanding the evolutionary history and future of plant lineages in a changing world.

    Original languageEnglish
    Article number1879
    Pages (from-to)1-7
    Number of pages7
    JournalNature Communications
    Volume4
    DOIs
    Publication statusPublished - 2013

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