Integration and scaling of <scp>UV</scp>‐B radiation effects on plants: from <scp>DNA</scp> to leaf

Suchar, Vasile Alexandru; Robberecht, Ronald

doi:10.1002/ece3.1332

Cited by 26 publications

(19 citation statements)

References 95 publications

(231 reference statements)

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“…The reduction of maximum plant expansion, as well as an overall increase of leaf phenolic concentrations due to solar UV radiation across both ranges confirms previously observed changes in plant morphology and leaf compounds in response to UV radiation (Suchar and Robberecht , Coffey et al. ).…”

Section: Discussionsupporting

confidence: 89%

“…). Regarding UV‐B, Suchar and Robberecht (, ) did not find an indication for a direct link between cost for epidermal UV‐B absorbing compounds and inhibition of growth. Accordingly, investment in photoprotection by secondary metabolites can be considered a very efficient plant response in high‐UV‐B environments and might enable evolution of phenotypic plasticity.…”

Section: Discussionmentioning

confidence: 94%

“…The development of thinner leaves with reduced LDMC is a syndrome of lower‐cost products and might be a useful strategy for New Zealand individuals under elevated UV‐B radiation, especially if DNA photorepair works well and epidermal absorbance by secondary metabolites is simultaneously enhanced (Feng et al. , Suchar and Robberecht ). This would be worth to be tested in a future study, as following the third hypothesis, New Zealand individuals were expected to evolve such specific adaptations to higher UV‐B intensities in the exotic range.…”

Section: Discussionmentioning

confidence: 99%

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

Hock

Hofmann

Müller

et al. 2019

Ecology

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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.

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Section: Discussionsupporting

confidence: 89%

Section: Discussionmentioning

confidence: 94%

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

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

Hock

Hofmann

Müller

et al. 2019

Ecology

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“…67 As a consequence, the exposure of plants to high levels of UV can lead to cell death dependent on ROS signaling. 68 Suchar & Robberecht 69 found out that repair mechanisms could not solely prevent the UV-B radiation interference with the cell division; resulting in significant reductions in leaf growth and development. Staxén et al 70 found that the exposure of cells to UV radiation has been shown to lead to a delay in the onset of mitosis using Petunia hybrida protoplasts.…”

Section: -63mentioning

confidence: 99%

Interaction of cytokinins with UV-B (280 -315nm) on the expansion growth of cucumber cotyledons

Kataria¹,

Kn²

2018

HIJ

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The negative effect on plant responses are expected due to increased amounts of ultraviolet-B (UV-B) radiation reaching on the Earth's surface by stratospheric ozone depletion. Cytokinins (CKs) are essential phytohormones in plant growth and development. Perusal of relevant literature reveals that CKs mitigate the oxidative damage caused by abiotic stresses like salt, drought, high temperature and heavy metal due to their antioxidant effects. However, very few reports are available on the interaction of CKs with UV-B stress on the expansion growth of the cucumber cotyledons. CKs induced the expansion growth of the excised cucumber cotyledons in the darkness. CKs induced expansion growth of cucumber cotyledons in darkness was inhibited by supplemental UV-B. UV-B radiation enhanced the level of oxyradicals like superoxide and hydroxide radicals in the excised cucumber cotyledons, which was evident by EPR spectroscopy. CKs like Zeatin, TDZ, BAP and FAP reduced the level of oxyradicals produced in the dark grown cucumber cotyledons, while promoting the expansion growth of the cotyledons. Production of oxyradical in UV-B exposed cotyledons showed that these oxyradicals might partially account for inhibition of expansion growth. Since considerable amount of oxyradicals were quenched by CKs at higher concentrations (10 and 20 µg/ml) it partially restores the inhibition of expansion growth caused by UV-B stress. It indicates that overproduction of oxyradicals by UV-B could not be entirely responsible for the inhibition of CKs induced expansion growth of cotyledons; which might be caused by some other physiological changes caused by UV-B irradiation in addition to the production of oxyradicals. UV-B is also known to inactivate protein inhibitor of peroxidase in cucumber cotyledons. This may reduce the antioxidants defence and enhance the damaging effects of oxyradicals for the growth of cotyledons.

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“…). These delays in cell division and expansion may result in significant reduction in leaf area (Suchar and Robberecht ). Although photosynthetic rates are not well‐correlated to total leaf area (Bazzaz ), a reduction in leaf area may result in reduction in the carbohydrate production of the plant.…”

Section: Model Frameworkmentioning

confidence: 99%

Integration and scaling ofUV‐B radiation effects on plants: from molecular interactions to whole plant responses

Suchar

Robberecht

2016

Ecology and Evolution

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A process based model integrating the effects of UV‐B radiation to molecular level processes and their consequences to whole plant growth and development was developed from key parameters in the published literature. Model simulations showed that UV‐B radiation induced changes in plant metabolic and/or photosynthesis rates can result in plant growth inhibitions. The costs of effective epidermal UV‐B radiation absorptive compounds did not result in any significant changes in plant growth, but any associated metabolic costs effectively reduced the potential plant biomass. The model showed significant interactions between UV‐B radiation effects and temperature and any factor leading to inhibition of photosynthetic production or plant growth during the midday, but the effects were not cumulative for all factors. Vegetative growth were significantly delayed in species that do not exhibit reproductive cycles during a growing season, but vegetative growth and reproductive yield in species completing their life cycle in one growing season did not appear to be delayed more than 2–5 days, probably within the natural variability of the life cycles for many species. This is the first model to integrate the effects of increased UV‐B radiation through molecular level processes and their consequences to whole plant growth and development.

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Integration and scaling of UV‐B radiation effects on plants: from DNA to leaf

Cited by 26 publications

References 95 publications

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

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

Interaction of cytokinins with UV-B (280 -315nm) on the expansion growth of cucumber cotyledons

Integration and scaling ofUV‐B radiation effects on plants: from molecular interactions to whole plant responses

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