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    Wyświetlanie 1-2 z 2
    Tytuł:
    Implications of Auxins in Induction of Adventitious Roots from Leaf Explants of Cannon Ball Tree (Couroupita guianensis Aubl.)
    Autorzy:
    Manokari, M.
    Shekhawat, Mahipal S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1191424.pdf
    Data publikacji:
    2016
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Adventitious roots
    Couroupita guianensis
    Half strength MS medium
    Lecythidaceae
    Opis:
    An effective protocol has been developed for the adventitious root culture of Cannon Ball tree (Couroupita guianensis Aubl.) from the leaves of in vitro germinated 30 days’ old seedlings. Seeds germinated on cytokinins and auxins supplemented with Murashige and Skoog (MS) medium. Half strength MS medium supplemented with 2.0 mg/L indole-3-butyric acid (IBA) was found the most suitable for the induction of adventitious roots (92%) from the midrib region of the leaves than the other auxins. The roots were proliferated on half strength MS liquid medium supplemented with IBA 0.5 mg/L. After eight weeks of inoculation the roots in the medium yielded 5.933 ±0.135 gm fresh and 2.731 ±0.010 gm dry biomass of adventitious roots. The growth rate was increased by 8-9 folds in this investigation.
    Źródło:
    World Scientific News; 2016, 33; 109-121
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation of Alnus subcordata for urban environments through assessment of drought and flooding tolerance
    Autorzy:
    Sjöman, H.
    Levinsson, A.
    Emilsson, T.
    Ibrahimova, A.
    Alizade, V.
    Douglas, P.
    Wiström, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/2078229.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Instytut Dendrologii PAN
    Tematy:
    climate change
    ecosystem services
    urban forestry
    stress tolerance
    adventitious roots
    Opis:
    The urban environment is stressful and trees experience multiple stresses, including drought, flooding, and extreme heat, all of which are likely to increase under future climate warming and increasing urbanisation. In the selection of tree species to maximise ecosystem services, tolerance to site characteristics such as flooding and severe drought is of critical importance. This study evaluated the suitability of a rare species, Alnus subcordata C.A. Mey (Caucasian alder) from the Hyrcanian forests of southern Azerbaijan, for its functionality as an urban tree. A total of 48 pot-grown, two-year-old saplings of A. subcordata were tested in a greenhouse experiment using a complete randomised block design. Each block contained four replicates of three treatments (waterlogging, drought, control), with 16 plants per treatment. Height differences between treatments were measured, and water status was estimated by determination of midday leaf water potential (ΨL) and stomatal conductance (gs ). To estimate drought tolerance reaction in the treatments, leaf water potential at turgor loss (ΨP0) was used together with broken-stick modelling of water status over time. There was a significant difference in tree height between the different treatments. In the drought treatment, A. subcordata plants showed no height increase, while plants in both the waterlogged and control treatments increased in height during the nine-week experiment. Over 63 days of flooding, plant water status was slightly more negative in the waterlogging treatment, but did not deviate essentially from the control. In the drought treatment, plant water status rapidly deviated from the control. There was a significant difference in ΨP0 between treatments, with drought-treated plants showing the lowest value (−2.31 MPa). This study demonstrated that A. subcordata has limited tolerance to drought and seems to rely more on water loss-avoiding strategies. However, the species may be usable at periodically waterlogged sites, due to its high tolerance to flooding. It could therefore be recommended for wet urban environments and stormwater management facilities, for which reliable guidance on suitable trees is currently lacking.
    Źródło:
    Dendrobiology; 2021, 85; 39-50
    1641-1307
    Pojawia się w:
    Dendrobiology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-2 z 2

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