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Ian K. Atkins and Jennifer K. Boldt

, however, light intensity is an important contributor not just to biomass accumulation but flower initiation and time to flower as well, and may not be able to be offset by CO 2 supplementation. In general, the LSP increased with increasing CO 2

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W. Garrett Owen and Roberto G. Lopez

computerized control system (Priva Computers Inc.). Environmental data for each species under each SSL LED or SL treatments for Reps 1 and 2 are reported in Table 2 . Fig. 1. ( A – E ) Spectral quality of supplemental light (SL) from high-pressure sodium (HPS

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I-Ling Lai, Chih-Wan Lin, Tsai-Yu Chen, and Wei-Hsin Hu

of light quality on micropropagation. The lamina of the explants incubated in 1/2 MS medium supplemented with 2.0 μM BA and 0.8 μM NAA grew optimally under an equal distribution of blue, red, and IR light, such as in 3B3R3IR ( Table 3 ). The induction

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Allison Hurt, Roberto G. Lopez, and Joshua K. Craver

light-emitting diode (LED_70) lamps at a photosynthetic photon flux density ( PPFD ) of 70 µmol·m –2 ·s –1 ; supplemental lighting based on an instantaneous threshold (on from 0600 to 2200 hr when outside PPFD was less than ≈440 µmol·m –2 ·s –1

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Ying-Chun Chen, Chen Chang, and Huey-Ling Lin

supplemented with NAA. Plantlets derived from initial culture on the PA2L medium were cut into nodal segments as explants to clarify the effects of the three cytokinins on bud multiplication and elongation. Light quality affects plantlet growth and chlorophyll

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Veronica A. Hutchinson, Christopher J. Currey, and Roberto G. Lopez

were provided with supplemental light (≈4 to 5 mol·m −2 ·d −1 ) during the last two-thirds or entire young plant stage, shoot dry mass and number of leaves increased, whereas subsequent time to flower decreased. Similarly, increasing propagation DLI

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Nguyen Phuc Huy, Vu Quoc Luan, Le Kim Cuong, Nguyen Ba Nam, Hoang Thanh Tung, Vu Thi Hien, Dung Tien Le, Kee Yoeup Paek, and Duong Tan Nhut

-elongated ex vitro explants as the source under dark–light cycles for plant regeneration through internode tissue cultures. The results of this study provide a new approach to micropropagation of P. callosum for commercial propagation. Materials and Methods

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Christopher J. Currey and Roberto G. Lopez

.8 ± 10.9, 49.2 ± 4.5, and 27.8 ± 1.7 μmol·m −2 ·s −1 , respectively, at plant height [as measured with a quantum sensor (LI-COR Biosciences)], respectively, from 0600 to 2200 hr ( Table 2 ). Supplemental light was delivered from HPS lamps (e-system HID

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Xia Chun-hua and Chen Jian-hua

shell fragment mass C (mg) and cultivation time T (weeks) on PAL activity in the pedicles The PAL activity in the pedicels cultivated under weak light (220 μmol·m −2 ·s −1 ) was determined by applying a general formula nutrient solution supplemented

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David A. Baumbauer, Colleen B. Schmidt, and Macdonald H. Burgess

Growers of leafy greens in mid-latitude (40–50°) high tunnels who wish to extend their growing season past mid-autumn are faced with two significant challenges: low air temperatures, primarily at night, and low daily light integral (DLI) due to