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A. Maaike Wubs, Ep Heuvelink, Leo F.M. Marcelis, Gerhard H. Buck-Sorlin, and Jan Vos

and the same architecture could be established in all plants. Supplemental light was provided by high-pressure sodium lamps (600 W; Philips, Eindhoven, The Netherlands), which provided 150 μmol·m −2 ·s −1 at crop level. Lamps were switched on between

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Marc W. van Iersel and David Gianino

2 concentrations. Campanula portenschlagiana was grown under long day conditions (19-h photoperiod) with supplemental light from high-pressure sodium lamps at a PPF of ≈60 μmol·m −2 ·s −1 whenever ambient PPF dropped below 198 μmol·m −2 ·s −1

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John R. Yeo, Jerry E. Weiland, Dan M. Sullivan, and David R. Bryla

temperature and equipped with 1000-W high-pressure sodium lamps. The lamps were set to extend the daily photoperiod to 16 h·d −1 . Six plants of each cultivar were selected at random and inoculated with P. cinnamomi at 26 d after transplanting. The remaining

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Matthew G. Blanchard and Erik S. Runkle

was 20.1 ± 2.6 °C, as measured by aspirated thermocouples and recorded by a CR10 data logger (Campbell Scientific, Logan, Utah). Natural photoperiods were extended to a 16-h photoperiod (0600 to 2200 hr ) by high-pressure sodium lamps that delivered a

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Christopher Parry and Bruce Bugbee

studies were conducted in a spatially uniform greenhouse environment in the Research Greenhouse Complex at Utah State University, Logan (lat. 41.7°N, 111.8°W). To achieve rapid growth rates in all studies, supplemental lighting from high-pressure sodium

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Christopher J. Currey and John E. Erwin

conditions (St. Paul, MN, lat. 45°N) supplemented with 75 μmol·m −2 ·s −1 photosynthetic photon flux from high-pressure sodium lamps when ambient light intensity was <200 μmol·m −2 ·s −1 from 0700 to 0100 hr (18-h photoperiod). Plants were irrigated with

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Yun Kong and Youbin Zheng

with four blocks and four NaCl concentrations within each block. The greenhouse conditions were set at 18-h light/6-h dark by supplementing natural sunlight with high-pressure sodium lamps to achieve a photosynthetically active radiation at the canopy

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Shengping Zhang, Han Miao, Xing-fang Gu, Yuhong Yang, Bingyan Xie, Xiaowu Wang, Sanwen Huang, Yongchen Du, Rifei Sun, and Todd C. Wehner

basis) and was steam sterilized at 134 °C for 30 min. Seedlings were placed in a growth chamber held at 25/20 °C day/night with a 16-h photoperiod. Illumination was provided by high-pressure sodium lamps at 50 W·m −2 . Identification materials were

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Christopher J. Currey and Nicholas J. Flax

provided. High-pressure sodium lamps delivered a supplemental photosynthetic photon flux of 191 ± 27 µmol·m −2 ·s −1 at plant height [as measured with a quantum sensor (LI-190 SB; LI-COR Biosciences, Lincoln, NE)] to maintain a target daily light integral

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Neil O. Anderson, Esther Gesick, Vincent Fritz, Charlie Rohwer, Shengrui Yao, Patricia Johnson, Steven Poppe, Barbara E. Liedl, Lee Klossner, Neal Eash, and Judith Reith-Rozelle

-old plants) and 2005 (for 1-year-old-plants) until rooted. Tip cuttings rooted in ≈1 week. Hence, they were grown in greenhouse conditions (lat. 45° N; St. Paul, MN) for 4 weeks of vegetative growth (long days, 0800 to 1600 hr supplied by 400-W high-pressure