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  • 1
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    Photosynthetic photon flux, photoperiod, and temperature effects on emissions of (Z)-3-hexenal, (Z)-3-hexenol, and (Z)-3-hexenyl acetate from lettuce (1996)
    In:  Other Sources
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    Publication Date: 2011-08-24
    Description: To investigate the effects of environment on plant volatile emissions, 'Waldmann's Green' leaf lettuce was cultivated under different levels of photosynthetic photon flux (PPF), photoperiod, and temperature. A modified growth chamber was used to sample plant volatile emissions nondestructively, over time, and under controlled conditions. Total volatile emission rates were significantly higher from lettuce cultivated under PPF of 360 or 200 micromoles m-2 s-1 compared to 105 micromoles m-2 s-1, and significantly higher under a 16-h photoperiod than an 8-h photoperiod. No differences were detected among emission rates from different temperature treatments. In controlled environments, emissions could be regulated by adjusting environmental conditions accordingly.
    Keywords: Life Sciences (General)
    Type: Journal of the American Society for Horticultural Science. American Society for Horticultural Science (ISSN 0003-1062); Volume 121; 3; 488-94
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    A system and methodology for measuring volatile organic compounds produced by hydroponic lettuce in a controlled environment (1996)
    In:  Other Sources
    Details
    Publication Date: 2011-08-24
    Description: A system and methodology were developed for the nondestructive qualitative and quantitative analysis of volatile emissions from hydroponically grown 'Waldmann's Green' leaf lettuce (Lactuca sativa L.). Photosynthetic photon flux (PPF), photoperiod, and temperature were automatically controlled and monitored in a growth chamber modified for the collection of plant volatiles. The lipoxygenase pathway products (Z)-3-hexenal, (Z)-3-hexenol, and (Z)-3-hexenyl acetate were emitted by lettuce plants after the transition from the light period to the dark period. The volatile collection system developed in this study enabled measurements of volatiles emitted by intact plants, from planting to harvest, under controlled environmental conditions.
    Keywords: Man/System Technology and Life Support
    Type: Journal of the American Society for Horticultural Science. American Society for Horticultural Science (ISSN 0003-1062); Volume 121; 3; 483-7
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
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