UV-B radiation alters interactions between photosynthesis and secondary metabolism in variegated Plectranthus coleoides
Аутори
Vidović, Marija![](/themes/Mirageimagine/images/orcid.png)
Morina, F.
Milić, S.
Winkler, J.B.
Albert, A.
Zechmann, B.
![](/themes/Mirageimagine/images/orcid.png)
Veljović Jovanović, S.
Остала ауторства
Gaberščik, AlenkaКонференцијски прилог (Објављена верзија)
![](/themes/Mirageimagine//images/creativecommons/arr.png)
Метаподаци
Приказ свих података о документуАпстракт
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 regi...mes. 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.
Кључне речи:
variegated plants / realistic UV-B radiation / apigenin / cyanidin / phenylpropanoids / H2O2 scavenging system / CO2 assimilationИзвор:
COST-Action FA0906 - UV4Growth, 2014, 59-Издавач:
- Ljubljana : Department of Biology, Biotechnical Faculty
Финансирање / пројекти:
- Модификације антиоксидативног метаболизма биљака са циљем повећања толеранције на абиотски стрес и идентификација нових биомаркера са применом у ремедијацији и мониторингу деградираних станишта (RS-MESTD-Integrated and Interdisciplinary Research (IIR or III)-43010)
- COST Action FA0906 grant for two STSMs in Munich during 2011 and 2012.
Напомена:
- Abstracts of the Final Netwotk Meeting of COST Action FA0906 UV4growth - Bled, Slovenia, 30 March - 2 April 2014 ;
Институција/група
Institut za molekularnu genetiku i genetičko inženjerstvoTY - 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 .