Drought tolerance screening of a Rosa population

Katrien De Dauw, Marie-Christine Van Labeke, Leen Leus, Johan Van Huylenbroeck

    Onderzoeksoutput: Hoofdstuk in Boek/Rapport/CongresprocedureC1: Artikels in proceedings van wetenschappelijke congressen, die niet inbegrepen zijn in A1, A2, A3 of P1

    Uittreksel

    Drought stress severely impacts plant production worldwide, and is predicted to increasingly affect crop production due to climate change. One of the main strategies to cope with the changing environment is the development of new cultivars with an improved tolerance to drought stress. A study was initiated to compare mitotically induced tetraploid roses with their diploid counterparts for their drought stress tolerance. The first step in this research is the development of a screening method to evaluate segregation for drought tolerance in a diploid rose population. Therefore, drought tolerance was screened in 69 genotypes selected from the F1 population resulting from a R. ‘Yesterday’ × R. wichurana hybridisation. The plants were subjected to two different irrigation regimes, reducing the amount of water received by the drought stress group to less than 10% of an optimal amount given in the control group. Relative water content (RWC), leaf water potential (?) and effective photochemical quantum yield of photosystem II (Y(II)) were measured, next to stomatal size and density, and leaf morphological characteristics. RWC and ? were good indicators for screening drought sensitivity of the genotypes. However, Y(II) did not prove to be a reliable screening method in this study. This approach allowed the selection of interesting rose genotypes for further characterisation and tetraploidisation, potentially forming the basis of future drought tolerant rose cultivars.
    TaalEngels
    TitelProceedings of the Second International Symposium on Woody Ornamentals of the Temperate Zone
    EditorsJohan Van Huylenbroeck, Marie-Christine Van Labeke, Katrijn Van Laere
    Volume990
    Plaats productieGent (Belgium)
    UitgeverijInternational Society for Horticultural Science
    Datum2013
    Pagina's121-127
    ISBN van geprinte versie978-90-66054-77-6
    StatusGepubliceerd - 2013
    Evenement2nd ISHS Symposium on Woody Ornamentals of the Temperate Zone - Gent, België
    Duur: 1-jul-20124-jul-2012
    http://www.ilvo.vlaanderen.be/woodyornamentals2012/

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