Developmental phase-dependent photosynthetic responses to ultraviolet-B radiation: damage, defence, and adaptation of primary leaves of wheat seedlings

Pradhan, Manoj Kumar; Nayak, Lalitendu; Joshi, Padmanava; Mohapatra, Pranab Kishor; Patro, Lichita; Biswal, Basanti; Biswal, U. C.

doi:10.1007/s11099-008-0067-z

Cited by 11 publications

(6 citation statements)

References 48 publications

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“…Our results on W. arrhiza under UV-B radiation are in full agreement with these previous reports. Moreover, our results clearly indicate that the photosynthetic pigments also are degraded by UV-B radiation; this finding is consistent with other research carried out on higher plants (Feng et al, 2003;Farooq et al, 2000Farooq et al, , 2005Pradhan et al, 2008) and implies that the amount of antenna size had been altered under UV-B radiation.…”

Section: Discussionsupporting

confidence: 92%

Effects of UV-B radiation on photosynthesis activity of Wolffia arrhiza as probed by chlorophyll fluorescence transients

Wang

Hao

Anken

et al. 2010

Advances in Space Research

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Section: Discussionsupporting

confidence: 92%

Effects of UV-B radiation on photosynthesis activity of Wolffia arrhiza as probed by chlorophyll fluorescence transients

Wang

Hao

Anken

et al. 2010

Advances in Space Research

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“…DNA damage, measured by homologous recombination events, is clearly more severe in younger Arabidopsis [ 15 ] and Nicotiana plants than in older ones [ 7 ]. On the other hand, the decline in anthocyanin, chlorophyll and carotenoid contents as well as in photosynthetic yield is higher in older plants [ 16 , 17 ].…”

Section: Introductionmentioning

confidence: 99%

The effect of UV-B on Arabidopsis leaves depends on light conditions after treatment

et al. 2015

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BackgroundUltraviolet B (UV-B) irradiation can influence many cellular processes. Irradiation with high UV-B doses causes chlorophyll degradation, a decrease in the expression of genes associated with photosynthesis and its subsequent inhibition. On the other hand, sublethal doses of UV-B are used in post-harvest technology to prevent yellowing in storage. To address this inconsistency the effect of short, high-dose UV-B irradiation on detached Arabidopsis thaliana leaves was examined.ResultsTwo different experimental models were used. After short treatment with a high dose of UV-B the Arabidopsis leaves were either put into darkness or exposed to constant light for up to 4 days. UV-B inhibited dark-induced chlorophyll degradation in Arabidopsis leaves in a dose-dependent manner. The expression of photosynthesis-related genes, chlorophyll content and photosynthetic efficiency were higher in UV-B -treated leaves left in darkness. UV-B treatment followed by constant light caused leaf yellowing and induced the expression of senescence-related genes. Irrespective of light treatment a high UV-B dose led to clearly visible cell death 3 days after irradiation.ConclusionsHigh doses of UV-B have opposing effects on leaves depending on their light status after UV treatment. In darkened leaves short UV-B treatment delays the appearance of senescence symptoms. When followed by light treatment, the same doses of UV-B result in chlorophyll degradation. This restricts the potential usability of UV treatment in postharvest technology to crops which are stored in darkness.Electronic supplementary materialThe online version of this article (doi:10.1186/s12870-015-0667-2) contains supplementary material, which is available to authorized users.

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“…The effects of UV-B (60 µmol m −2 s −1 ) on primary leaves of wheat seedlings during different phases of leaf growth and development were assessed. UV-B induced an enhancement in accumulation of flavonoids during all phases of development while it caused a decline in anthocyanin content during senescence (Pradhan et al, 2008). UV-B exposure induced maximum damage to the photosynthetic apparatus during senescence phase of development although the damages were partially alleviated when UV-B exposure was accompanied by photosynthetically active radiation (PAR).…”

Section: Crop Plants -The Target Of Uv-b Study Effectsmentioning

confidence: 99%

UV-B radiation effects on terrestrial plants – A perspective

Reboredo

Lidon

2012

ejfa

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Both terrestrial and aquatic plants, the primary producers supporting life on earth, can be threatened by global climate change and particularly by UV-B radiation due to the depletion of the ozone layer in both Poles. The injurious effects of UV-B have been assessed mainly through in vitro studies and vary greatly according the dose received, the exposition period and the sensitivity of the species. Adaptive responses can include for example, synthesis of new compounds, increases of UV-B absorbing compounds or anti-oxidant enzymes. Morphological consequences are also documented such as reduced growth and thickening of leaves and cuticule. The main response of UV-B irradiation in indoor experiments is the formation of UV-B absorbing compounds such as phenolic compounds and flavonoids which function as protective screens, although in the natural habitat plants living at higher altitudes and latitudes are tolerant to UV-B due to the natural selection. The main conclusion derived from studies with terrestrial plants is that photosynthesis is not significantly affected by changes in UV-B radiation when plants grow under natural conditions. Moreover, due to the successful implementation of the Montreal Protocol the increase of UV-B radiation in most populated regions of the world (i.e., outside the regions affected by the Antarctic ozone hole) has been modest.

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Developmental phase-dependent photosynthetic responses to ultraviolet-B radiation: damage, defence, and adaptation of primary leaves of wheat seedlings

Cited by 11 publications

References 48 publications

Effects of UV-B radiation on photosynthesis activity of Wolffia arrhiza as probed by chlorophyll fluorescence transients

Effects of UV-B radiation on photosynthesis activity of Wolffia arrhiza as probed by chlorophyll fluorescence transients

The effect of UV-B on Arabidopsis leaves depends on light conditions after treatment

UV-B radiation effects on terrestrial plants – A perspective

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