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Elisa Solis-Toapanta and Celina Gómez

compensation point for plants grown under DLI 8 , DLI 10 , and DLI Inc was significantly greater than that measured for plants grown under DLI 4 , ranging from 21.5 to 24.4 µmol·m ‒2 ·s ‒1 . No treatment differences were measured for the light saturation point

Open access

Joshua K. Craver, Krishna S. Nemali, and Roberto G. Lopez

,max ), photosynthetic rate at operating radiation intensity (A op ), light compensation point (LCP), light saturation point (LSP), and quantum yield (α) for petunia ‘Dreams Midnight’ seedlings grown in walk-in growth chambers with CO 2 concentration set points of 450

Free access

Toshio Shibuya, Ryosuke Endo, Yuki Kitamura, Yoshiaki Kitaya, and Nobuaki Hayashi

light compensation point, estimated from the light-response curve of P n (data not shown), was 35 μmol·m −2 ·s −1 in FL H seedlings and 33 μmol·m −2 ·s −1 in ML seedlings. The ratio of P g of the FL H seedlings to that of the ML seedlings increased

Open access

Sydney Lykins, Katlynn Scammon, Brian T. Lawrence, and Juan Carlos Melgar

, starting from the highest irradiance at 2400 to 200 μmol·m –2 ·s –1 , and then at 100, 50, and 0 μmol·m –2 ·s –1 (for a detailed plotting of the curve in the area near the compensation point) at 2-min average intervals ( Evans and Santiago, 2014 ; Lobo et

Free access

Krishna S. Nemali and Marc W van Iersel

+ C i )], where A 0 is the estimated photosynthetic rate when C i is 0, A 0 + a is the maximum attainable A at saturating C i , and b is a regression coefficient} was fitted using SAS (SAS Institute, Cary, NC). The CO 2 compensation point (Γ) was

Free access

Amy L. Burton, Svoboda V. Pennisi, and Marc W. van Iersel

negative value, because it represents a CO 2 efflux from the plant). The light compensation point was determined by solving Eq. 1 for PPF and a P n of 0 μmol·m −2 ·s −1 . The light saturation point was determined as the PPF at which P n was 95% of

Open access

Guoting Liang, Junhui Liu, Jingmin Zhang, and Jing Guo

photosynthetic rate (μmol·m −2 ·s −1 ); and I c is the light compensation point (LCP) (μmol·m −2 ·s −1 ). Data processing. SPSS 17.0 software and Excel (2016 for Windows; Microsoft, Redmond, WA) were employed for one-way analysis of variance and Fisher

Free access

Ariana P. Torres and Roberto G. Lopez

the following (mg·L −1 ): 100 nitrogen, 15 phosphorus, 84 potassium, 34 calcium, 14 magnesium, 0.5 iron, 0.25 manganese and zinc, 0.13 boron and copper, and 0.05 molybdenum (Peters Excel© Cal-Mag© 15N-2.2P-12.5K; The Scotts Co., Marysville, OH

Free access

Christopher J. Currey and Roberto G. Lopez

dark respiration (μmol·m −2 ·s −1 ). In addition, the above equation was solved for the PPF (μmol·m −2 ·s −1 ) where P g = R d and P g = 0.95 × P gmax to determine the light compensation point (LCP) and light saturation point (LSP

Free access

Celina Gómez and Cary A. Mitchell

-to-west with 3.7 m gutter height, 6.7 m peak height, and a floor area of 111 m 2 . Once the cotyledons had expanded fully, SL of 100 ± 3.2 μmol·m ‒2 ·s ‒1 from an HPS lamp (Ceramalux; Philips Lighting Co., Somerset, NJ) was provided for 14 h daily. All