Growth and Plant Morphology of Cucumis Sativus and Fuchsia X Hybrid Are Influenced by Light Quality During the Photoperiod and by Diurnal Temperature Alternations

Moe, R.; Morgan, L.; Grindal, G.

doi:10.17660/actahortic.2002.580.30

Cited by 10 publications

(6 citation statements)

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“…Namely, shoot elongation and root formation were promoted by auxin activity enhanced by blue light. The blue light caused an increase in the activity of indole-3-acetic acid oxidase, the enzyme that stimulates the biosynthesis of auxin [ 18 ]. However, the range and direction of response may vary depending on species and light spectrum.…”

Section: Resultsmentioning

confidence: 99%

The Protective Function and Modification of Secondary Metabolite Accumulation in Response to Light Stress in Dracocephalum forrestii Shoots

Weremczuk-Jeżyna

Hnatuszko-Konka

Lebelt

et al. 2021

IJMS

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The aim of this work was to determine the effect of stress conditions caused by different light sources, i.e., blue LED (λ = 430 nm), red LED (λ = 670 nm), blue and red LED (70%:30%) and white LED (430–670 nm) on the growth and morphology of cultivated in vitro Dracocephalum forrestii shoot culture. It also examines the effects on bioactive phenolic compound production and photosynthetic pigment content, as well as on antioxidant enzyme activity (CAT, SOD, POD) and antioxidant properties. The most beneficial proliferation effect was observed under white LEDs (7.1 ± 2.1 shoots per explant). The white and blue lights stimulated the highest fresh weight gain, while red light induced the highest dry weight gain. The total phenolic acid content ranged from 13.824 ± 1.181 to 20.018 ± 801 mg g DW−1 depending on light conditions. The highest content of rosmarinic acid was found in the control shoots (cultivated under fluorescent lamps), followed by culture grown under red light. All LED treatments, especially red and blue, increased salvianolic acid B content, and blue increased apigenin p-coumarylrhamnoside biosynthesis. The greatest ferric reduction activity was observed in shoots cultivated under red light, followed by blue; this is associated with the presence of the highest total phenol content, especially phenolic acids. Similarly, the highest DPPH radical scavenging potential was observed under red light followed by blue. This study proves that LEDs have emerged as significant support for directed in vitro propagation, taking advantage of specific stress responses on various light spectra. This study also showed how stress induced by different LED light spectra increases in Dracocephalum forrestii the synthesis of pharmacologically-active compounds. Hence, light stress may turn out to be a simpler alternative to metabolic engineering for improving the production of secondary metabolites of therapeutic value.

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Section: Resultsmentioning

confidence: 99%

The Protective Function and Modification of Secondary Metabolite Accumulation in Response to Light Stress in Dracocephalum forrestii Shoots

Weremczuk-Jeżyna

Hnatuszko-Konka

Lebelt

et al. 2021

IJMS

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“…B light alone does not seem to sufficiently modify the flowering process to be of practical value in horticulture, e.g., by shifting the flowering period. However, in combination with R light, B light can delay flowering, as observed in fuchsia (Fuchsia Â hybrida) cultivated in growth chamber conditions (Moe et al, 2002). This response appears to be species-dependent since it was not observed in azalea (Rhododendron simsii) (Schamp et al, 2012).…”

Section: Use Of Blue and Uv-b Lights In Ornamental And Vegetable Hortmentioning

confidence: 96%

Light signaling and plant responses to blue and UV radiations—Perspectives for applications in horticulture

Huché-Thélier

Crespel

Gourrierec

et al. 2016

Environmental and Experimental Botany

368

241

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“…Hao and Papadopoulos ( 1999 ) found that plant dry mass production could be increased through lighting supplementation, and dry mass allocation was increased to the fruit and decreased to the stem. In this study, the total and fruits dry mass of plants with light supplementation was significantly higher than the control, however, though the stem dry mass ratio under LED-B was significant higher than the control but it was decreased under LED-A, plant height and stem diameter were higher under LED-B than under LED-A and control lighting conditions, the stem and leaf dry mass ratio of plants under the LED-B strategy were higher than those under LED-A and control conditions, indicating that red light plays an important role in promoting elongation of the plant stem and dry matter accumulation, in order to guide assimilation of the mass to the stem and leaf (Moe et al 2002 ). Blue light facilitates leaf expansion and helps to assimilate products to the fruit (Chu et al 1999 ; Ni et al 2009 ).…”

Section: Discussionmentioning

confidence: 99%

Effects of light-emitting diode supplementary lighting on the winter growth of greenhouse plants in the Yangtze River Delta of China

Guyue

et al. 2016

Bot Stud

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BackgroundThe winter in the Yangtze River Delta area of China involves more than 1 month of continuous low temperature and poor light (CLTL) weather conditions, which impacts horticultural production in an unheated greenhouse; however, few greenhouses in this area are currently equipped with a heating device. The low-cost and long-living light-emitting diode (LED) was used as an artificial light source to explore the effects of supplementary lighting during the dark period in CLTL winter on the vegetative characteristics, early yield, and physiology of flowering for pepper plants grown in a greenhouse without heating. Two LED lighting sets were employed with different light source to provide 65 μmol m−2 s−1 at night: (1) LED-A: red LEDs (R, peak wavelength 660 nm) and blue LEDs (B, peak wavelength 460 nm) with an R:B ratio of 6:3; and (2) LED-B: R and B LEDs at an R:B ratio of 8:1. Plants growth parameters and chlorophyll fluorescence characteristics were compared between lighting treatments and the control group.ResultsPlants’ yield and photosynthesis ability were improved by LED-A. Pepper grown under the LED-A1 strategy showed a 303.3 % greater fresh weight of fruits and a 501.3 % greater dry mass compared with the control group. Plant leaves under LED-A1 showed maximum efficiency of the light quantum yield of PSII, electron transfer rate, and the proportion of the open fraction of PSII centers, with values 113.70, 114.34, and 211.65 % higher than those of the control group, respectively, and showed the lowest rate constant of thermal energy dissipation of all groups. LED-B was beneficial to the plant height and stems diameter of the pepper plants more than LED-A.ConclusionsThese results can serve as a guide for environment control and for realizing low energy consumption for products grown in a greenhouse in the winter in Southern China.

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Growth and Plant Morphology of Cucumis Sativus and Fuchsia X Hybrid Are Influenced by Light Quality During the Photoperiod and by Diurnal Temperature Alternations

Cited by 10 publications

References 0 publications

The Protective Function and Modification of Secondary Metabolite Accumulation in Response to Light Stress in Dracocephalum forrestii Shoots

The Protective Function and Modification of Secondary Metabolite Accumulation in Response to Light Stress in Dracocephalum forrestii Shoots

Light signaling and plant responses to blue and UV radiations—Perspectives for applications in horticulture

Effects of light-emitting diode supplementary lighting on the winter growth of greenhouse plants in the Yangtze River Delta of China

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