Partial protection of photosynthetic apparatus from UV-B-induced damage by UV-A radiation

Joshi, Padmanava; Ramaswamy, N.K.; Iyer, Ramkumar K.; Nair, J.P.; Pradhan, Manoj Kumar; Gartia, Sasmita; Biswal, Basanti; Biswal, U. C.

doi:10.1016/j.envexpbot.2005.11.005

Cited by 39 publications

(24 citation statements)

References 26 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%

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

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%

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

View full text Add to dashboard Cite

show abstract

“…The sensitivity of plants to UV-B irradiation is much greater at low PPFD and UV-A levels (Cen and Bornman 1990). UV-A helps to develop a protective pathway against UV-B-induced damage of photosynthetic apparatus (Joshi et al 2007). High PPFDs may confer protection from UV-B damage by increasing photosynthesis and the available biochemical energy for defence and/or repair processes.…”

Section: Uv-b and Other Factorsmentioning

confidence: 99%

Climate Change and Crops

Singh¹

2009

Environmental Science and Engineering

View full text Add to dashboard Cite

“…6). In general, drastic decrease of Fv:Fm was mostly observed in response to UV-B (Joshi et al, 2007;Sharma et al, 1998;Zhang et al, 2005) or spectra including some parts of UV-C (Yao et al, 2006). Exclusion of UV-B spectra through a filter increased both Fv:Fm and plant growth in Virgna unguiculata L. (Lingakumar et al, 1999).…”

Section: Chlorophylls and Carotenoidsmentioning

confidence: 99%

“…Photochemical efficiency of PS2 The activity of PS2 makes sites susceptible to UV damage, so photochemical efficiency has been used as a biomarker in plants (Cordi et al, 1997;Joshi et al, 2007;Zhang et al, 2005). In this study, irradiation of B-UV both at day and night drastically decreased the potential quantum yield (Fv:Fm), and this effect was a little stronger in tomato than in pepper leaves (Fig.…”

Section: Chlorophylls and Carotenoidsmentioning

confidence: 99%

Growth Inhibition and Seedling Injury in Response to UV Spectra and Irradiation Timing in Plug-transplants of Pepper (Capsicum annunm L.) and Tomato (Solanum lycopersicum)

Jeong

Huh

2010

J. Japan. Soc. Hort. Sci.

View full text Add to dashboard Cite

The objectives of this study were to determine the effects of UV spectra (broad UV 274-400 nm, B-UV or filtered UV 286-400 nm, F-UV) and irradiation timing (at day or night) on growth inhibition and seedling injury in plugtransplants of pepper (Capsicum annunm L. 'Nogkwang') and tomato (Solanum lycopersicum, 'Pinktop'). We investigated some parameters, to clarify the plant response, such as ion leakage, lipid peroxidation, chlorophylls, careotenoids, photochemical efficiency, UV absorbing compound, plant growth, and flowering. The results showed that irradiation of B-UV at night significantly inhibited plant height and total leaf area in two species. However, it caused seedling injuries such as leaf necrosis and bloomlessness regardless of irradiation timing. While irradiation of F-UV did not cause any seedling injury regardless of irradiation timing, it significantly inhibited plant height by 25.4% in pepper and by 26.1% in tomato. Our results suggest that irradiation of F-UV at night may be desirable to control excessive stem elongation in plug-transplants during summer, in addition to being safe to the grower.

show abstract

Partial protection of photosynthetic apparatus from UV-B-induced damage by UV-A radiation

Cited by 39 publications

References 26 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?

Climate Change and Crops

Growth Inhibition and Seedling Injury in Response to UV Spectra and Irradiation Timing in Plug-transplants of Pepper (Capsicum annunm L.) and Tomato (Solanum lycopersicum)

Contact Info

Product

Resources

About