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UV-B radiation and photosynthetic irradiance acclimate eggplant for outdoor exposureTreatment of greenhouse-grown eggplant (Solanum melongena L. var. esculentum Nees. 'Burpee's Black Beauty') seedlings with supplemental photosynthetically active radiation from cool-white fluorescent lamps increased growth of plants subsequently transferred outdoors relative to growth of plants that received no supplemental radiation or were shaded to 45% of solar irradiation in the greenhouse before transfer outdoors. Eggplant seedlings transferred outdoors were placed under plastic tarps either to provide relative protection from solar ultraviolet-B (UV-B) radiation (280-315 nm) using Mylar film or to allow exposure to UV-B using cellulose acetate. Protection of seedlings from UV-B radiation resulted in greater leaf expansion than for UV-B-exposed seedlings, but no change in leaf or shoot dry weight occurred after 9 days of treatment. Specific leaf weight increased in response to UV-B exposure outdoors. Exposure of eggplant to UV-B radiation from fluorescent sunlamps in the greenhouse also decreased leaf expansion and leaf and shoot dry weight gain after 5 days of treatment. However, there were no differences in leaf or shoot dry weight relative to control plants after 12 days of UV-B treatment, indicating that UV-B treated plants had acclimated to the treatment and actually had caught up with non-UV-B-irradiated plants in terms of growth.
Document ID
Document Type
Reprint (Version printed in journal)
Latimer, J. G.
(Purdue University West Lafayette, IN 47907, United States)
Mitchell, C. A.
Mitchell, G. A.
Date Acquired
August 21, 2013
Publication Date
June 1, 1987
Publication Information
Publication: HortScience : a publication of the American Society for Horticultural Science
Volume: 22
Issue: 3
ISSN: 0018-5345
Subject Category
Life Sciences (General)
Distribution Limits
NASA Program Space Biology
NASA Discipline Number 40-30
NASA Discipline Plant Biology
Non-NASA Center

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