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Christos Lykas, Constantinos Kittas, Nikolaos Katsoulas, and Maria Papafotiou

that the P-PE film induces a strong PPFD reduction and a light quality modification within the range of the two forms of phytochrome (P r and P fr ) and establishes a radiation regime with high ζ n values and high B:R ratios ( Table 3 ), which could

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Ming Li and Wei-tang Song

density ( PPFD ) provided by “cool white” fluorescent lamps on the top surface of tray]. The day/night regimes of temperature and relative humidity were 25/19 °C and 70%/80%, respectively. The seedlings were irrigated daily with a nutrient solution for

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Mohammed Elsayed El-Mahrouk, Yaser Hassan Dewir, and Yougasphree Naidoo

grown in a shade greenhouse with an average noon photosynthetic photon flux density (PPFD) of 180 µmol·m −2 ·s −1 and mean daily temperature of 25 °C in the nursery of El Kenana Company, Tanta, Egypt. Aglaonema shoots (5–10 cm long) were defoliated

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Kaori Itagaki, Toshio Shibuya, Motoaki Tojo, Ryosuke Endo, and Yoshiaki Kitaya

(RH) of 50%, and a photosynthetic photon flux density (PPFD) of 200 μmol·m −2 ·s −1 under a light:dark cycle of 16:8 h. To obtain seedlings of about the same developmental stage and leaf area (≈17 cm 2 per plant) for the inoculation tests, the seeds

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Uttara C. Samarakoon and James E. Faust

photon flux reduction) when the photosynthetic photon flux density ( PPFD ) measured outside the greenhouse exceeded 968 μmol·m −2 ·s −1 . A peat-based growing medium (Fafard 3B; Conrad Fafard, Inc., Agawam, MA) was used for all experiments. A constant

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Krishna Nemali and Marc W. van Iersel

drought-sensitive and drought-tolerant bedding plant species respond to drought stress by relating differences in whole-plant photosynthesis to physiological responses observed on leaf and cellular scales for both species when exposed to a gradual drought

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Nobuyuki Fukuoka, Takamoto Suzuki, Keisuke Minamide, and Tatsuro Hamada

) , in G. bicolor leaves, a greater part of the ROS scavenging activity resulting from phenolic compounds was detected in the CGA fraction, not the anthocyanin fraction. The content of CGA is known to increase in response to environmental stresses ( Oh

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Elisa Solis-Toapanta, Paul R. Fisher, and Celina Gómez

photon flux density ( PPFD ) of 100 µmol·m −2 ·s –1 for 16 h·d −1 , resulting in a DLI of 5.8 mol·m −2 ·d −1 . Until germination occurred, seedlings were irrigated as needed with tap water with a 0.4 dS·m −1 EC, 8.3 pH, and 31.2 mg·L ‒1 calcium

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Sheng Xu, Mingmin Jiang, Jiangyan Fu, Lijian Liang, Bing Xia, and Ren Wang

were exposed to a series of PPF density (PPFD) values: 2000, 1600, 1300, 1000, 800, 600, 400, 200, 100, 50, 20, and 0 μmol·m −2 ·s −1 . Leaf pigments content. Total photosynthetic pigments were extracted with 95% ethanol. Fresh leaf tissue (0.1 g) was

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Charlie Garcia and Roberto G. Lopez

example, Kim et al. (2006) found that a high percentage of G radiation [>50% of the photosynthetic photon flux density ( PPFD )] reduced growth of lettuce ( Lactuca sativa ), while a lower percentage (24%) of G radiation in combination with B and R LEDs