Red and blue light effects on morphology and flowering of Petunia×hybrida

Gautam, Pramod; Terfa, Meseret Tesema; Olsen, Jorunn E.; Torre, Sissel

doi:10.1016/j.scienta.2015.01.004

Cited by 43 publications

(25 citation statements)

References 33 publications

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“…In some investigations into plants, it has been tried to avoid the spectra out of PAR region by using a proper light source radiating within PAR, 36,37 or using filters to prevent plants from UV, FR, or IR spectra. [38][39][40] In most reports neither of these two techniques have been employed nor have been mentioned if used, this is in spite of the fact that data taken under artificial light sources are potentially the most erroneous ones. …”

Section: -27mentioning

confidence: 99%

“…The composition of a light source spectra, in or out of PAR, has comprehensive effects on plants growth and development, and may induce a specific or distinct response. For instance, PAR is reported in papers investigating flowering, 39 vernalization, 43 stress tolerance, 44 morphogenesis, secondary metabolites, 45 development, 46 etc. Thus, measuring light in PAR simply disregards the effect of a certain important band of electromagnetic radiation and each spectrum roles in plant responses.…”

Section: Importance Of Light Source Spectra Compositionmentioning

confidence: 99%

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Plant Responses to Extended Photosynthetically Active Radiation (EPAR)

Pessarakli¹

2017

APAR

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Current and future life sciences demand more data for experiments, modeling and computing. After introducing Photosynthetically Active Radiation (PAR), the quality of light was sacrificed for the quantity. PAR has an intrinsic drawback that stems from reporting light sources by a number of the irradiated quanta. In pieces of research on photosynthesis, PAR generally and appropriately is used, whereas PAR has been inappropriately used in pieces of research not dealing with photosynthesis directly as a parameter. Different light sources have diverse spectral photon fluxes (SPF), both in and out of PAR region, which can affect the results of a research quite apart from measured light intensity in PAR. Here, many published papers about light quality effects on plant growth and development are reviewed. In addition, PAR disadvantages and SPF-based extended PAR (EPAR) advantages are discussed to show that a quantitative unit cannot be sufficiently informative where photosynthesis is not the sole parameter. Instead, EPAR is proposed to be considered for research on plants and reporting the results to provide more and detailed information.

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Section: -27mentioning

confidence: 99%

Section: Importance Of Light Source Spectra Compositionmentioning

confidence: 99%

Plant Responses to Extended Photosynthetically Active Radiation (EPAR)

Pessarakli¹

2017

APAR

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“…B light-enhanced elongation growth was demonstrated in species like Salvia L., Tagetes L. and Petunia Juss. [17][18][19][20][21]. Also, enhanced elongation in response to FR light or low R:FR ratios is exhibited in plants classified as sun plants but not in shade plants [22].…”

Section: Introductionmentioning

confidence: 97%

Day Extension with Far-Red Light Enhances Growth of Subalpine Fir (Abies lasiocarpa (Hooker) Nuttall) Seedlings

Chiang

Toresdatter

Jetmundsen

et al. 2018

Forests

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Subalpine fir (Abies lasiocarpa (Hooker) Nuttall), which is native to western North America, is of considerable interest for Christmas tree production in northern Europe. Seedlings are usually grown from seeds under combined nursery greenhouse/outdoors conditions, but commonly show early growth cessation in the nursery, resulting in small plants for field transplanting. This increases the production time and makes the seedlings vulnerable to stressors at the planting site. Day extension with far-red (FR) light was shown to enhance elongation and delay bud set in seedlings of some woody species, but such information is limited for Abies. Here, we investigated the effects of day extension with FR, red (R), different R:FR-ratios or blue (B) light from light emitting diodes on subalpine fir seedlings grown at different temperatures. Day extension with FR or combined R-FR light, in contrast to R or B light, increased shoot elongation significantly as compared to short days without day extension, often with more growth at 18 • C than 24 • C. The FR treatments delayed terminal bud development, although bud set was not completely prevented. These results demonstrate that larger seedlings of subalpine fir seedlings for Christmas tree production can be obtained by employing day extension with FR or combined R:FR light, preferably under cool temperature.

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“…Light is a primary energy source for plants, and is therefore an important regulator in plant growth (Hogewoning et al , Gautam et al ). Both light quality and light intensity have been shown to have a diverse range of effects on plant physiology (Qaderi et al ) and biochemistry (Jaakola and Hohtola , Jung et al ), and these effects may differ among species (Qaderi et al ).…”

Section: Introductionmentioning

confidence: 99%

Light quality and quantity regulate aerobic methane emissions from plants

Martel

Qaderi

2016

Physiologia Plantarum

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Studies have been mounting in support of the finding that plants release aerobic methane (CH ), and that these emissions are increased by both short-term and long-term environmental stress. It remains unknown whether or not they are affected by variation in light quantity and quality, whether emissions change over time, and whether they are influenced by physiological parameters. Light is the primary energy source of plants, and therefore an important regulator of plant growth and development. Both shade-intolerant sunflower and shade-tolerant chrysanthemum were investigated for the release of aerobic CH emissions, using either low or high light intensity, and varying light quality, including control, low or normal red:far-red ratio (R:FR), and low or high levels of blue, to discern the relationship between light and CH emissions. It was found that low levels of light act as an environmental stress, facilitating CH release from both species. R:FR and blue lights increased emissions under low light, but the results varied with species, providing evidence that both light quantity and quality regulate CH emissions. Emission rates of 6.79-41.13 ng g DW h and 18.53-180.25 ng g DW h were observed for sunflower and chrysanthemum, respectively. Moreover, emissions decreased with age as plants acclimated to environmental conditions. Since effects were similar in both species, there may be a common trend among a number of shade-tolerant and shade-intolerant species. Light quantity and quality are influenced by factors including cloud covering, so it is important to know how plants will be affected in the context of aerobic CH emissions.

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Red and blue light effects on morphology and flowering of Petunia×hybrida

Cited by 43 publications

References 33 publications

Plant Responses to Extended Photosynthetically Active Radiation (EPAR)

Plant Responses to Extended Photosynthetically Active Radiation (EPAR)

Day Extension with Far-Red Light Enhances Growth of Subalpine Fir (Abies lasiocarpa (Hooker) Nuttall) Seedlings

Light quality and quantity regulate aerobic methane emissions from plants

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