High blue light improves acclimation and photosynthetic recovery of pepper plants exposed to UV stress

Hoffmann, Anna M.; Noga, Georg; Hunsche, Maurício

doi:10.1016/j.envexpbot.2014.06.017

Cited by 90 publications

(67 citation statements)

References 48 publications

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“…Recently, we demonstrated that light quality, particularly the amount of blue light, affects the vulnerability of pepper plants to UV stress (Hoffmann et al 2015). Other authors suggest that light induced acclimations might also affect drought vulnerability.…”

Section: Introductionmentioning

confidence: 98%

Acclimations to light quality on plant and leaf level affect the vulnerability of pepper (Capsicum annuum L.) to water deficit

2015

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We investigated the influence of light quality on the vulnerability of pepper plants to water deficit. For this purpose plants were cultivated either under compact fluorescence lamps (CFL) or light-emitting diodes (LED) providing similar photon fluence rates (95 µmol m(-2) s(-1)) but distinct light quality. CFL emit a wide-band spectrum with dominant peaks in the green and red spectral region, whereas LEDs offer narrow band spectra with dominant peaks at blue (445 nm) and red (665 nm) regions. After one-week acclimation to light conditions plants were exposed to water deficit by withholding irrigation; this period was followed by a one-week regeneration period and a second water deficit cycle. In general, plants grown under CFL suffered more from water deficit than plants grown under LED modules, as indicated by the impairment of the photosynthetic efficiency of PSII, resulting in less biomass accumulation compared to respective control plants. As affected by water shortage, plants grown under CFL had a stronger decrease in the electron transport rate (ETR) and more pronounced increase in heat dissipation (NPQ). The higher amount of blue light suppressed plant growth and biomass formation, and consequently reduced the water demand of plants grown under LEDs. Moreover, pepper plants exposed to high blue light underwent adjustments at chloroplast level (e.g., higher Chl a/Chl b ratio), increasing the photosynthetic performance under the LED spectrum. Differently than expected, stomatal conductance was comparable for water-deficit and control plants in both light conditions during the stress and recovery phases, indicating only minor adjustments at the stomatal level. Our results highlight the potential of the target-use of light quality to induce structural and functional acclimations improving plant performance under stress situations.

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Section: Introductionmentioning

confidence: 98%

Acclimations to light quality on plant and leaf level affect the vulnerability of pepper (Capsicum annuum L.) to water deficit

2015

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“…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%

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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“…Environmental and biotic stresses such as salts, UV, drought, wounding, and pathogen attacks are known to cause production of reactive oxygen species (ROS) causing them oxidative stress [1]. In general, energy-rich UV leads to the generation of free radicals which damage DNA, protein, membrane lipids and the photosynthetic machinery including chloroplasts and the degradation of photosynthetic pigments [2]. Plant exposure to high levels of UV radiation causes an oxidative stress [3] and results in leaf chlorosis and necrosis [4], which subsequently influences plant growth [5].…”

Section: Introductionmentioning

confidence: 99%

Changes in Chemical Composition, Total Phenolics and Antioxidant Activity of Alpinia (<i>Alpinia zerumbet</i>) Leaves Exposed to UV

Xuan

Khanh

Khang

et al. 2016

ILNS

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Alpinia zerumbet (Pers.) B.L. Burtt. & R.M. Sm is an important perennial ginger plant in the tropics with various uses as foods, dietary supplement, cosmetics, essential oil production and traditional medicines. In this study, essential oils, phenolic acids, fatty acids, kavains, total phenols and antioxidant activity in A. zerumbet plants exposed to UV-C were investigated. Number and weights of essential oils increased rapidly from 1 to 3 days of exposure. Major extend of essential oils was recorded in methyl cinnamate and followed by benzyl acetone. The correspondence to the accumulation of palmitic acid was 15 folds, in contrast to the strong reduction of stearic quantity was 10 folds at 3 days of treatment. Changes in chemical components and antioxidant capacity in A. zerumbet are differed reversely between the exposure of UV-C and heavy toxic chemicals. The exposure of UV-C is beneficial for the increasing of essential oil production in A. zerumbet.

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High blue light improves acclimation and photosynthetic recovery of pepper plants exposed to UV stress

Cited by 90 publications

References 48 publications

Acclimations to light quality on plant and leaf level affect the vulnerability of pepper (Capsicum annuum L.) to water deficit

Acclimations to light quality on plant and leaf level affect the vulnerability of pepper (Capsicum annuum L.) to water deficit

Plant Responses to Extended Photosynthetically Active Radiation (EPAR)

Changes in Chemical Composition, Total Phenolics and Antioxidant Activity of Alpinia (<i>Alpinia zerumbet</i>) Leaves Exposed to UV

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