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Examining Dehydration and Hypoxic Stress in Wheat Plants Using a Porous Tube Plant Nutrient Delivery System Developed for MicrogravityThe 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 capiflary action. A PTPNDS test bed was developed and 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) 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.
Document ID
20120001349
Acquisition Source
Kennedy Space Center
Document Type
Conference Paper
Authors
Dreschel, T. W.
(NASA Kennedy Space Center Cocoa Beach, FL, United States)
Hall, C. R.
(Dynamac Corp. Cocoa Beach, FL, United States)
Foster, T. E.
(Dynamac Corp. Cocoa Beach, FL, United States)
Salganic, M.
(NASA Kennedy Space Center Cocoa Beach, FL, United States)
Warren, L.
(NASA Kennedy Space Center Cocoa Beach, FL, United States)
Corbett, M.
(NASA Kennedy Space Center Cocoa Beach, FL, United States)
Date Acquired
August 25, 2013
Publication Date
January 1, 2005
Subject Category
Exobiology
Report/Patent Number
O5ICES-64
KSC-2005-048
Meeting Information
Meeting: International Conference on Environmental Systems
Location: Rome
Country: Italy
Start Date: July 11, 2005
End Date: July 14, 2005
Funding Number(s)
CONTRACT_GRANT: NAS10-12180
Distribution Limits
Public
Copyright
Public Use Permitted.
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