Search Results

You are looking at 101 - 110 of 1,996 items for :

  • Refine by Access: All x
Clear All
Open access

Claudia Elkins and Marc W. van Iersel

. To achieve this, effective lighting strategies should be developed that result in efficient use of the supplemental light to speed up growth. Dimmable LED fixtures can be used to develop improved lighting strategies because their light output can be

Open access

Celina Gómez and Juan Jiménez

System with EcoSys Software; Environmental Growth Chambers, Chagrin Falls, OH) using an average DLI of ≈13 mol·m ‒2 ·d ‒1 (150 ± 5 µmol·m ‒2 ·s ‒1 for 24-h·d ‒1 ) provided by red:blue LED lamps (GreenPower; Signify, Somerset, NJ) with peak wavelengths

Full access

D.M. Glenn, T. Tworkoski, R. Scorza, and S.S. Miller

The lack of dwarfing rootstocks for peach ( Bassi et al., 1994 ; Grossman and DeJong, 1998 ) has led to cultural approaches that reduce tree size and vegetative growth to establish high-density plantings. Water management through irrigation

Open access

Ji-Jhong Chen, Shuyang Zhen, and Youping Sun

et al., 2020 ; Neilsen et al., 1995 ). Relative chlorophyll content is estimated using the ratio of transmitted red light and NIR light emitted by a red and an NIR LED, respectively, through a leaf ( Monje and Bugbee, 1992 ). Transmitted red light

Free access

Yifan Jiang, Nan Zhao, Fei Wang, and Feng Chen

retain their color and shape for a long time. Therefore, globe amaranth has also been popular as a cut flower and a dried flower ( Cocozza Talia, 1993 ; Lourdusamy et al., 2002 ). Continuous germplasm selection and breeding have led to the production of

Open access

Tomohiro Jishi, Ryo Matsuda, and Kazuhiro Fujiwara

combination with blue and red LED light on the growth and morphology of cos lettuce. The four RSPFD change patterns were designed to investigate the effects of 12-h blue light monochromatic irradiation (B) and red-light monochromatic irradiation (R

Free access

Lingyan Chen, Jinli Lai, Tianyou He, Jundong Rong, Muhammad Waqqas Khan Tarin, and Yushan Zheng

excitation energy to drive photosynthesis. Conclusions There were two possible pathways related to the discoloration in the leaves of variegated temple bamboo plants. One possible pathway is that a chlorophyll biosynthesis blockage led to the failure of

Free access

Marina Petreikov, Lena Yeselson, Shmuel Shen, Ilan Levin, Arthur A. Schaffer, Ari Efrati, and Moshe Bar

the L1 H genotype was observed following the rapid increase in fruit size between mgI and mgII. The L1 H genotype led to an increase in the percentage of dry weight (DW; Fig. 2B ) throughout all of fruit development and this was accompanied by

Free access

Marc W. van Iersel, Geoffrey Weaver, Michael T. Martin, Rhuanito S. Ferrarezi, Erico Mattos, and Mark Haidekker

electric light, and sunlight can at best provide a small percentage of the light required by vertical farms ( Germer et al., 2011 ; Goto, 2012 ; Mok et al., 2014 ; Watanabe, 2011 ). Light-emitting diodes (LEDs) have become a popular light source for

Free access

N.C. Yorio, M. Sanwo, and C.S. Brown

Light-emitting diodes (LEDs) are a potential light source for growing plants in space flight systems because of their superior safety and reliability, small mass and volume, electrical efficiency, and longevity. To determine the influence of narrow-spectrum LEDs on plant growth and metabolism, wheat (Triticum aestivum L. `Superdwarf') plants were grown under red LEDs (peak emission 660 nm) and compared to plants grown under daylight fluorescent, red LEDs + 1% blue fluorescent light (BL), and red LEDs + 10% BL. Plants were taller, had longer flag leaves, and delayed seed development when grown under red LEDs or red LEDs + 1% BL compared to those grown with 10% BL or under daylight fluorescent. Viable seeds (290% germination) were produced in all plants regardless of the light treatment. Total dry matter (DM), head DM, and seed DM were similar in the plants grown under the four light regimes, and there were no differences in the starch content of the seeds. Starch levels were 4-times greater and sucrose levels were 2.5-times greater in leaves of plants grown under the red LEDs compared to daylight fluorescent. Daylight fluorescent leaves showed a 1.8-fold increase in sucrose phosphate synthase (SPS) activity, a regulatory enzyme of sucrose synthesis. These results indicate that wheat can be grown successfully under red LEDs, but there are differences in carbohydrate concentration and metabolism in photosynthetic tissue.