TY  - CONF
AU  - Vidović, Marija
AU  - Morina, F.
AU  - Milić, S.
AU  - Winkler, J.B.
AU  - Albert, A.
AU  - Zechmann, B.
AU  - Veljović Jovanović, S.
PY  - 2014
UR  - https://www.ucc.ie/en/uv4growth/
UR  - https://imagine.imgge.bg.ac.rs/handle/123456789/1880
AB  - This study is based on the results obtained from the experiments conducted within two Short Term
Science Missions (STSMs) in the Research Unit Environmental Simulation, Helmholtz Zentrum München
during 2011 and 2012. Our aim was to investigate the effects of realistic UV-B doses on photosynthesis
and secondary metabolism in variegated leaves. Variegated Plectranthus coleoides plants were exposed
to UV-B radiation (0.90 W m-2) under two photosynthetic active radiation (PAR) intensities (LL: 395 and
HL: 1350 μmol m-2 s-1) for nine days in the sun simulators at the Helmholtz Zentrum München. In the
green leaf portions, UV-B radiation stimulated photosynthetic rates in P. coleoides at both PAR
intensities and doubled the size of plastoglobuli whereas the contents of photosynthetic pigments were
slightly increased at HL. The concentrations of phenylpropanoids, catechins and hydroxybenzoic acids,
were preferentially accumulated in green leaf portions, independently on radiation regimes. A hallmark
of UV-B induced changes in plant metabolism, the induction of flavonoid pathway, was evidenced in P.
coleoides by accumulation of apigenin and cyanidin glycosides in the whole leaf at both background
PARs. UV-B induced accumulation of apigenin and cyanidin glycosides was more pronounced in the
white leaf portions, compared to green one. Moreover, we observed differential response of H2O2
scavenging system to high PAR and UV-B in relation to tissue type. Alteration of linear electron flow,
provoked by acclimation to UV-B at HL was associated with decreased ascorbate redox state and APX
activity. In summary, UV-B radiation stimulated CO2 assimilation and increased fixed carbon flow into
photosynthetic pigments, phenylpropanoids and flavonoids/anthocyanins which might be important for
photoprotection of photosynthetic machinery under high light intensity.
PB  - Ljubljana : Department of Biology, Biotechnical Faculty
C3  - COST-Action FA0906 - UV4Growth
T1  - UV-B radiation alters interactions between photosynthesis and secondary metabolism in variegated Plectranthus coleoides
SP  - 59
UR  - https://hdl.handle.net/21.15107/rcub_imagine_1880
ER  - 

@conference{
author = "Vidović, Marija and Morina, F. and Milić, S. and Winkler, J.B. and Albert, A. and Zechmann, B. and Veljović Jovanović, S.",
year = "2014",
abstract = "This study is based on the results obtained from the experiments conducted within two Short Term
Science Missions (STSMs) in the Research Unit Environmental Simulation, Helmholtz Zentrum München
during 2011 and 2012. Our aim was to investigate the effects of realistic UV-B doses on photosynthesis
and secondary metabolism in variegated leaves. Variegated Plectranthus coleoides plants were exposed
to UV-B radiation (0.90 W m-2) under two photosynthetic active radiation (PAR) intensities (LL: 395 and
HL: 1350 μmol m-2 s-1) for nine days in the sun simulators at the Helmholtz Zentrum München. In the
green leaf portions, UV-B radiation stimulated photosynthetic rates in P. coleoides at both PAR
intensities and doubled the size of plastoglobuli whereas the contents of photosynthetic pigments were
slightly increased at HL. The concentrations of phenylpropanoids, catechins and hydroxybenzoic acids,
were preferentially accumulated in green leaf portions, independently on radiation regimes. A hallmark
of UV-B induced changes in plant metabolism, the induction of flavonoid pathway, was evidenced in P.
coleoides by accumulation of apigenin and cyanidin glycosides in the whole leaf at both background
PARs. UV-B induced accumulation of apigenin and cyanidin glycosides was more pronounced in the
white leaf portions, compared to green one. Moreover, we observed differential response of H2O2
scavenging system to high PAR and UV-B in relation to tissue type. Alteration of linear electron flow,
provoked by acclimation to UV-B at HL was associated with decreased ascorbate redox state and APX
activity. In summary, UV-B radiation stimulated CO2 assimilation and increased fixed carbon flow into
photosynthetic pigments, phenylpropanoids and flavonoids/anthocyanins which might be important for
photoprotection of photosynthetic machinery under high light intensity.",
publisher = "Ljubljana : Department of Biology, Biotechnical Faculty",
journal = "COST-Action FA0906 - UV4Growth",
title = "UV-B radiation alters interactions between photosynthesis and secondary metabolism in variegated Plectranthus coleoides",
pages = "59",
url = "https://hdl.handle.net/21.15107/rcub_imagine_1880"
}

Vidović, M., Morina, F., Milić, S., Winkler, J.B., Albert, A., Zechmann, B.,& Veljović Jovanović, S.. (2014). UV-B radiation alters interactions between photosynthesis and secondary metabolism in variegated Plectranthus coleoides. in COST-Action FA0906 - UV4Growth
Ljubljana : Department of Biology, Biotechnical Faculty., 59.
https://hdl.handle.net/21.15107/rcub_imagine_1880

Vidović M, Morina F, Milić S, Winkler J, Albert A, Zechmann B, Veljović Jovanović S. UV-B radiation alters interactions between photosynthesis and secondary metabolism in variegated Plectranthus coleoides. in COST-Action FA0906 - UV4Growth. 2014;:59.
https://hdl.handle.net/21.15107/rcub_imagine_1880 .

Vidović, Marija, Morina, F., Milić, S., Winkler, J.B., Albert, A., Zechmann, B., Veljović Jovanović, S., "UV-B radiation alters interactions between photosynthesis and secondary metabolism in variegated Plectranthus coleoides" in COST-Action FA0906 - UV4Growth (2014):59,
https://hdl.handle.net/21.15107/rcub_imagine_1880 .