The Porous Tube Plant Nutrient Delivery System (PTPNDS) was designed for NASA to grow plants in microgravity of space. The system utilizes a controlled fluid loop to supply nutrients and water to plant roots growing on a ceramic surface moistened by capillary action. Utilizing remote sensing systems, spectral analyses procedures, gas-exchange, and fluorescence measurements, we examined differences in plant water status for wheat plants (Triticum aestivum, cv. Perigee). These plants were grown in a modified growth chamber during the summers of 2003 and 2004. Some differences in plant performance were detectable in the gas-exchange and fluorescence measurements. For instance, in both years the plants grown with the most available water had the lowest rates of photosynthesis and exhibited higher proportions of non-photochemical quenching, particularly under low light levels. In addition, small differences in mean leaf water content between treatments were detected using spectral reflectance analyses.


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    Titel :

    Examining Dehydration and Hypoxic Stress in Wheat Plants Using a Porous Tube Plant Nutrient Delivery System Developed for Microgravity


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Hall, C. R. (Autor:in) / Warren, L. (Autor:in) / Corbett, M. (Autor:in) / Salganic, M. (Autor:in) / Foster, T. E. (Autor:in) / Dreschel, T. W. (Autor:in)

    Kongress:

    International Conference On Environmental Systems ; 2005



    Erscheinungsdatum :

    2005-07-11




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




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