Adaptive mechanisms and genomic plasticity for drought tolerance identified in European black poplar (Populus nigra L.): Adaptatie en genomische plasticiteit voor droogte resistentie bij de Europese zwarte populier (Populus nigra L.)

Maud Viger, Hazel K. Smith, David Cohen, Jennifer Dewoody, Harriet Trewin, Marijke Steenackers, Catherine Bastien, Gail Taylor

    Research output: Contribution to journalA1: Web of Science-article

    131 Downloads (Pure)

    Abstract

    Summer droughts are likely to increase in frequency and intensity across Europe, yet long-lived trees may have a limited ability to tolerate drought. It is therefore critical that we improve our understanding of phenotypic plasticity to drought in natural populations for ecologically and economically important trees such as Populus nigra L. A common garden experiment was conducted using ∼500 wild P. nigra trees, collected from 11 river populations across Europe. Phenotypic variation was found across the collection, with southern genotypes from Spain and France characterized by small leaves and limited biomass production. To examine the relationship between phenotypic variation and drought tolerance, six genotypes with contrasting leaf morphologies were subjected to a water deficit experiment. ‘North eastern’ genotypes were collected at wet sites and responded to water deficit with reduced biomass growth, slow stomatal closure and reduced water use efficiency (WUE) assessed by Δ13C. In contrast, ‘southern’ genotypes originating from arid sites showed rapid stomatal closure, improved WUE and limited leaf loss. Transcriptome analyses of a genotype from Spain (Sp2, originating from an arid site) and another from northern Italy (Ita, originating from a wet site) revealed dramatic differences in gene expression response to water deficit. Transcripts controlling leaf development and stomatal patterning, including SPCH, ANT, ER, AS1, AS2, PHB, CLV1, ERL1–3 and TMM, were down-regulated in Ita but not in Sp2 in response to drought.
    Original languageEnglish
    JournalTree physiology
    Volume36
    Issue number7
    Pages (from-to)909-928
    ISSN0829-318X
    DOIs
    Publication statusPublished - 11-May-2016

    Thematic list

    • Species and biotopes

    EWI Biomedical sciences

    • B004-botany

    Taxonomic list

    • poplar (Populus spp.)
    • drought tolerance
    • populus nigra
    • adaptive mechanisms
    • genomic plasticity

    Policy

    • nature management

    Geographic list

    • Europe

    Technological

    • genetic technologies
    • forestry technology

    Fingerprint Dive into the research topics of 'Adaptive mechanisms and genomic plasticity for drought tolerance identified in European black poplar (Populus nigra L.): Adaptatie en genomische plasticiteit voor droogte resistentie bij de Europese zwarte populier (Populus nigra L.)'. Together they form a unique fingerprint.

    Cite this