Protective effect of UV-A radiation during acclimation of the photosynthetic apparatus to UV-B treatment

Štroch, Michal; Materová, Zuzana; Vrábl, Daniel; Karlický, Václav; Šigut, Ladislav; Nezval, Jakub; Špunda, Vladimı́r

doi:10.1016/j.plaphy.2015.07.017

Cited by 37 publications

(23 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…There are several possible explanations for this discrepancy between our results and UV‐A supplementation studies. We used a UV‐A LED source with a narrow peak at 365 nm, whereas the majority of UV‐A supplementation studies have used UV‐A fluorescent lamps with a broader spectrum across the UV‐A region [Joshi et al (330–390 nm), Victório et al (320–400 nm), Štroch et al (350–400 nm)]. The absorption spectra of all the photoreceptors considered here, and additionally phytochrome, absorb in the UV‐A region (Shinomura et al , Briggs and Huala , Heijde and Ulm ).…”

Section: Discussionmentioning

confidence: 99%

“…, Tables S1–S3) throughout their growth, or that it was not high enough to elicit a flavonoid response in WT. Transmittance to the chloroplasts of non‐damaging amounts of UV‐A radiation may even be useful as it can drive photosynthesis (Bilger et al , Turnbull et al , Štroch et al ), being absorbed by Chl and inducing Chl fluorescence (McCree , Lang and Lichtenthaler ). The potential benefits of UV‐A radiation for photosynthesis could be more pronounced in shaded understorey conditions, where light is often limiting and the UV‐A irradiance is considered unlikely to be high enough to induce stress or photodamage (Casal , Štroch et al ) but is proportionally enriched compared to PAR (Flint and Caldwell , Leuchner et al , Urban et al , Dengel et al ).…”

Section: Discussionmentioning

confidence: 99%

“…However, epidermal screening by UV‐absorbing compounds such as flavonoids often drastically reduces the amount of UV‐A radiation reaching Chl a and Chl b in the mesophyll (Bilger et al ). This means that UV‐A radiation may only be exploited as an alternative energy source for photosynthesis in low‐light environments when plants have low concentrations of epidermal UV‐absorbing compounds (Štroch et al ).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Do UV‐A radiation and blue light during growth prime leaves to cope with acute high light in photoreceptor mutants ofArabidopsis thaliana?

Brelsford

Morales

Nezval

et al. 2018

Physiologia Plantarum

Self Cite

View full text Add to dashboard Cite

We studied how plants acclimated to growing conditions that included combinations of blue light (BL) and ultraviolet (UV)-A radiation, and whether their growing environment affected their photosynthetic capacity during and after a brief period of acute high light (as might happen during an under-canopy sunfleck). Arabidopsis thaliana Landsberg erecta wild-type were compared with mutants lacking functional blue light and UV photoreceptors: phototropin 1, cryptochromes (CRY1 and CRY2) and UV RESISTANT LOCUS 8 (uvr8). This was achieved using light-emitting-diode (LED) lamps in a controlled environment to create treatments with or without BL, in a split-plot design with or without UV-A radiation. We compared the accumulation of phenolic compounds under growth conditions and after exposure to 30 min of high light at the end of the experiment (46 days), and likewise measured the operational efficiency of photosystem II (ϕPSII, a proxy for photosynthetic performance) and dark-adapted maximum quantum yield (F /F to assess PSII damage). Our results indicate that cryptochromes are the main photoreceptors regulating phenolic compound accumulation in response to BL and UV-A radiation, and a lack of functional cryptochromes impairs photosynthetic performance under high light. Our findings also reveal a role for UVR8 in accumulating flavonoids in response to a low UV-A dose. Interestingly, phototropin 1 partially mediated constitutive accumulation of phenolic compounds in the absence of BL. Low-irradiance BL and UV-A did not improve ϕPSII and F /F upon our acute high-light treatment; however, CRYs played an important role in ameliorating high-light stress.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Do UV‐A radiation and blue light during growth prime leaves to cope with acute high light in photoreceptor mutants ofArabidopsis thaliana?

Brelsford

Morales

Nezval

et al. 2018

Physiologia Plantarum

Self Cite

View full text Add to dashboard Cite

show abstract

“…UV‐A radiation is highly related to UV‐B and known for its mitigating effect, as it induces protection measures of the photosynthetic apparatus under abiotic stress conditions (e.g., high UV‐B, drought) and therefore increases physiological resilience (Štroch et al. , Escobar‐Bravo et al. , Verdaguer et al.…”

Section: Introductionmentioning

confidence: 99%

“…Due to potential costs involved in these responses, increased UV-B radiation may consequently result in decreased competitive ability and reduced fitness of individuals with potentially negative implications for establishment and colonization in novel environments. UV-A radiation is highly related to UV-B and known for its mitigating effect, as it induces protection measures of the photosynthetic apparatus under abiotic stress conditions (e.g., high UV-B, drought) and therefore increases physiological resilience ( Stroch et al 2015, Escobar-Bravo et al 2017, Verdaguer et al 2017. Thus, investigation of UV-B radiation effects on individual plants performance and population fitness should be conducted under natural radiation conditions to ensure ecologically relevant UV environments characterized by a particular relation of UV-A, UV-B, and photosynthetically active radiation (PAR: 380-700 nm; Kuhlmann and M€ uller 2011).…”

Section: Introductionmentioning

confidence: 99%

Exotic plant species are locally adapted but not to high ultraviolet‐B radiation: a reciprocal multispecies experiment

Hock

Hofmann

Müller

et al. 2019

Ecology

View full text Add to dashboard Cite

Ultraviolet (UV) radiation intensities differ among global regions, with significantly higher levels in the southern hemisphere. UV‐B may act as an environmental filter during plant invasions, which might particularly apply to plant species from Europe introduced to New Zealand. Just like for any other abiotic or biotic filter, successful invaders can cope with novel environmental conditions via plastic responses and/or through rapid adaptation by natural selection in the exotic range. We conducted a multispecies experiment with herbaceous plants in two common gardens located in the species’ native and exotic ranges, in Germany and New Zealand, respectively. We used plants of German and New Zealand origin of eight species to test for adaptation to higher UV‐B radiation in their new range. In each common garden, all plants were exposed to three radiation treatments: (1) ambient sunlight, (2) exclusion of UV‐B while transmitting ambient UV‐A, and (3) combined exclusion of UV‐B and UV‐A. Linear mixed‐effect models revealed significant effects of UV‐B on growth and leaf traits and an indication for UV‐B‐induced biomass reduction in both common gardens pointing to an impact of natural, ambient UV radiation intensities experienced by plants in the northern and in the southern hemisphere. In both common gardens, the respective local plants (i.e., German origins in Germany, New Zealand origins in New Zealand) displayed enhanced productivity and aboveground biomass allocation, thus providing evidence for recent evolutionary processes in the exotic range. Genetic differentiation between different origins in consequence of divergent local selection pressures was found for specific leaf area. This differentiation particularly hints at different selective forces in both ranges while only little evidence was found for an immediate selective effect of high UV‐B intensities in the exotic range. However, reaction norm slopes across ranges revealed higher plasticity of exotic individuals in functional leaf traits that might allow for a more sensitive regulation of photoprotection measures in response to UV‐B. During the colonization, New Zealand populations might have been selected for the observed higher phenotypic plasticity and a consequently increased ability to successfully spread in the exotic range.

show abstract

UV‐B Resistance of Plants Grown in Natural Conditions

Pescheck

Bilger

2020

Annual Plant Reviews Online

View full text Add to dashboard Cite

Plants protect themselves against potentially harmful effects of solar ultraviolet‐B radiation by a variety of mechanisms conferring UV‐B resistance. The underlying resistance mechanisms of a plant can be acclimated corresponding to the prevailing UV‐B exposure in their habitat such that under natural conditions UV‐B damage does not seem to exist. UV‐B resistance is not only induced by UV‐B radiation but to a large extent also by other environmental factors. Here, we review current evidence on how abiotic variables, e.g. low temperature or water deficit, affect UV‐B resistance mechanisms. We are focusing on acclimation of UV‐B screening through the accumulation of UV absorbing compounds, which is well investigated, and on the removal of UV‐B‐induced DNA damage by repair. Although the latter is a resistance mechanism specifically directed to UV‐B‐induced damage, it is strongly underinvestigated. Interaction of UV‐B radiation and other environmental factors can occur at the level of signal transduction chains, most often leading to cross‐resistance. Additionally, the influence of environmental conditions on physiological reactions may lead either to cross‐resistance or cross‐sensitivity.

show abstract

Protective effect of UV-A radiation during acclimation of the photosynthetic apparatus to UV-B treatment

Cited by 37 publications

References 34 publications

Do UV‐A radiation and blue light during growth prime leaves to cope with acute high light in photoreceptor mutants ofArabidopsis thaliana?

Do UV‐A radiation and blue light during growth prime leaves to cope with acute high light in photoreceptor mutants ofArabidopsis thaliana?

Exotic plant species are locally adapted but not to high ultraviolet‐B radiation: a reciprocal multispecies experiment

UV‐B Resistance of Plants Grown in Natural Conditions

Contact Info

Product

Resources

About