Evaluation of chlorophyll fluorescence, in vivo spectrophotometric pigment absorption and ion leakage as biomarkers of UV-B exposure in marine macroalgae

Cordi, Britt; Depledge, Michael H.; Price, David; Salter, Leo; Donkin, Maria E.

doi:10.1007/s002270050223

Cited by 40 publications

(23 citation statements)

References 29 publications

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“…Irradiation of F-UV both at day and night slightly decreased Fv:Fm after irradiation, and then Fv:Fm recovered within 12 h to the same levels as controls, in the two species. These results are consistent with those of Cordi et al (1997), who found that Fv:Fm was decreased and then fully recovered within 24 h after UV exposure in marine macroalgae. It suggests that photochemical efficiency might be also strongly affected by spectra difference and different spectral irradiance between B-UV and F-UV rather than irradiation timing and plant species.…”

Section: Chlorophylls and Carotenoidssupporting

confidence: 93%

“…Ion leakage from leaf tissue has been used to investigate the environmental stress index for representing cell membrane damage in plants (Cordi et al, 1997;Zu et al, 2003). In the two species, ion leakage was mainly affected by B-UV, regardless of irradiation timing (Fig.…”

Section: Ion Leakage and Lipid Peroxidationmentioning

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%

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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.

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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.

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Section: Chlorophylls and Carotenoidssupporting

confidence: 93%

Section: Ion Leakage and Lipid Peroxidationmentioning

confidence: 99%

Section: Chlorophylls and Carotenoidsmentioning

confidence: 99%

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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.

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“…Pigment content can give fundamental information on the light harvesting capacity of the algae, and indirectly provides some insights on their possible responses to UVR. Pigment accumulation and light harvesting capacity are usually uncoupled (Cordi et al 1997). Nutrient limitation exacerbates photoinhibition in U. rotundata (Henley & Ramus 1989).…”

Section: Discussionmentioning

confidence: 99%

Effects of nutrient supply on photosynthesis and pigmentation in Ulva lactuca (Chlorophyta): responses to short-term stress

et al. 2009

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The effects of nutrient supply on photosynthesis (estimated as chlorophyll fluorescence), chlorophyll content, biomass yield and proximate chemical composition of tank cultivated Ulva lactuca L. (Chlorophyta) were evaluated. To assess the effect of nutrient supply on resistance capacity against short-term stress, algae grown in high nutrient supply (HNS) fishpond effluents and in low nutrient supply (LNS) oligotrophic seawater were transferred to small vessels with increased irradiance of PAR and UV radiation (PAR+UVA and PAR+UVA+UVB using cut-off filters) and increased temperature as compared to culture tanks. Electron transport rate and chlorophyll content were higher in HNS than in LNS algae. Effective quantum yield and chlorophyll content decreased after short-term exposure to high PAR irradiance. Full recovery of photosynthesis in the shade was observed under a moderately higher temperature (Δ+ 6°C). UVB exposure reduced the negative effect of UVA on photosynthesis and pigment accumulation under temperature stress (Δ+10°C), particularly in HNS algae. Growth under HNS appeared to accelerate acclimation of Ulva lactuca to short-term environmental changes, such as higher temperatures (as in heat waves) and higher UV radiation. Furthermore, nitrogen enrichment reduced the common inhibitory effects of short-term stress such as increased irradiance, UV radiation and temperature on photosynthesis.

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“…Esse padrão de destruição está de acordo com a distribuição desses pigmentos nos cloroplastos (Beach et al, 2000). Tais dados sugerem uma importância maior do conteúdo pigmentar como biomarcador dos efeitos da radiação UV (Cordi et al, 1997).…”

Section: Efeitos Da Radiação Uvb Nas Algasunclassified

Efeitos da radiação UVB no crescimento, conteúdo pigmentar e fotossíntese de Gracilaria caudata (Gracilariales, Rhodophyta)

Araújo¹

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Evaluation of chlorophyll fluorescence, in vivo spectrophotometric pigment absorption and ion leakage as biomarkers of UV-B exposure in marine macroalgae

Cited by 40 publications

References 29 publications

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)

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)

Effects of nutrient supply on photosynthesis and pigmentation in Ulva lactuca (Chlorophyta): responses to short-term stress

Efeitos da radiação UVB no crescimento, conteúdo pigmentar e fotossíntese de Gracilaria caudata (Gracilariales, Rhodophyta)

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