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Oak genome reveals facets of long lifespan
Univ Bordeaux, BIOGECO, INRA, Cestas, France.
CEA, Genoscope, Inst Biol Francois Jacob, Evry, France.ORCID iD: 0000-0003-1718-3010
Univ ParisSaclay, URGI, INRA, Versailles, France.
Univ Bordeaux, BIOGECO, INRA, Cestas, France.
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2018 (English)In: NATURE PLANTS, ISSN 2055-026X, Vol. 4, no 7, p. 440-452Article in journal (Refereed) Published
Abstract [en]

Oaks are an important part of our natural and cultural heritage. Not only are they ubiquitous in our most common landscapes' but they have also supplied human societies with invaluable services, including food and shelter, since prehistoric times(2). With 450 species spread throughout Asia, Europe and America(3), oaks constitute a critical global renewable resource. The longevity of oaks (several hundred years) probably underlies their emblematic cultural and historical importance. Such long-lived sessile organisms must persist in the face of a wide range of abiotic and biotic threats over their lifespans. We investigated the genomic features associated with such a long lifespan by sequencing, assembling and annotating the oak genome. We then used the growing number of whole-genome sequences for plants (including tree and herbaceous species) to investigate the parallel evolution of genomic characteristics potentially underpinning tree longevity. A further consequence of the long lifespan of trees is their accumulation of somatic mutations during mitotic divisions of stem cells present in the shoot apical meristems. Empirical(4) and modelling(5) approaches have shown that intra-organismal genetic heterogeneity can be selected for(6) and provides direct fitness benefits in the arms race with short-lived pests and pathogens through a patchwork of intra-organismal phenotypes(7). However, there is no clear proof that large-statured trees consist of a genetic mosaic of clonally distinct cell lineages within and between branches. Through this case study of oak, we demonstrate the accumulation and transmission of somatic mutations and the expansion of disease-resistance gene families in trees.

Place, publisher, year, edition, pages
2018. Vol. 4, no 7, p. 440-452
National Category
Evolutionary Biology Genetics
Identifiers
URN: urn:nbn:se:uu:diva-364056DOI: 10.1038/s41477-018-0172-3ISI: 000443221200016PubMedID: 29915331OAI: oai:DiVA.org:uu-364056DiVA, id: diva2:1269068
Funder
EU, FP7, Seventh Framework ProgrammeEU, European Research CouncilSwedish Foundation for Strategic Research Available from: 2018-12-07 Created: 2018-12-07 Last updated: 2018-12-07Bibliographically approved

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Chen, JunLascoux, Martin

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