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  • Climate change effects  (1)
  • Morphogenesis  (1)
  • 1
    ISSN: 1617-4623
    Schlagwort(e): Indoleacetic acid conjugates ; Phytohormone activity ; Plant genetic engineering ; Morphogenesis
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Summary The iaaL gene of Pseudomonas syringae subsp. savastanoi encodes an indoleacetic acid-lysine synthetase that conjugates lysine to indoleacetic acid. A chimaeric gene consisting of the iaaL coding region under the control of the 35S RNA promoter from cauliflower mosaic virus (35SiaaL) has been used to test if iaaL gene expression leads to morphological alterations in tobacco and potato. Transgenic tobacco plantlets bearing this construct have been shown to synthesize IAA-[14C]lysine when fed with [14C]lysine. In late stages of development, their leaves show an increased nastic curvature (epinasty) of the petiole and midvein, a finding suggestive of an abnormal auxin metabolism. The alteration is transmitted to progeny as a dominant Mendelian trait cosegregating with the kanamycin resistance marker. Transgenic potato plants harbouring the construct are also characterised by petiole epinasty. Moreover, 35SiaaL transgenic plants have an increased internode length in potato and decreased root growth in both tobacco and potato. An increased content of IAA-conjugates in leaf blade was found to correlate with the epinastic alterations caused by iaaL gene expression in tobacco leaves. These data provide evidence that IAA conjugation is able to modulate hormone action, suggesting that the widespread endogenous auxin-conjugating activities are of physiological importance.
    Materialart: Digitale Medien
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 2
    Publikationsdatum: 2024-06-10
    Beschreibung: By 2030, success for Ocean Decade Challenge number 5 will be marked by a move toward a more sustainable and climate-resilient ocean that aligns with the United Nations’ sustainable development goals. Crucially, the success of Challenge 5 is intricately linked to the outcomes of Challenges 1 to 4, which focus on understanding climate-ocean interactions, controlling marine pollution, conserving biodiversity, and ensuring sustainable food production. Success will include fulfillment of critical science and knowledge gaps with respect to climate adaptation and mitigation. Both approaches need to be addressed in parallel. Key mitigation approaches include the development of marine renewable energies, reduction in marine pollution, the development of blue carbon ecosystems, and marine carbon dioxide removal (mCDR). Adaptation approaches include increased ocean literacy/awareness; co-designed governance and co-operation; improved risk reduction policies; and improved predictive capability of ocean, climate, and weather forecasts. Challenge 5 was reported as one of the most commonly cited Challenges for knowledge uptake in the Decade. However, important gaps still remain in terms of the geographical scope of the actions under this and other challenges.
    Beschreibung: Published
    Beschreibung: Refereed
    Schlagwort(e): Climate change effects ; Ocean prediction ; Ocean forecasting ; Weather forecasting
    Repository-Name: AquaDocs
    Materialart: Report
    Format: 25pp.
    Standort Signatur Einschränkungen Verfügbarkeit
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