TY  - JOUR
AU  - Vidović, Marija
AU  - Morina, Filis
AU  - Milić Komić, Sonja
AU  - Zechmann, Bernd
AU  - Albert, Andreas
AU  - Winkler, Jana Barbro
AU  - Veljović-Jovanović, Sonja
PY  - 2015
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/873
AB  - We used variegated Plectranthus coleoides as a model plant with the aim of clarifying whether the effects of realistic ultraviolet-B (UV-B) doses on phenolic metabolism in leaves are mediated by photosynthesis. Plants were exposed to UV-B radiation (0.90Wm(-2)) combined with two photosynthetically active radiation (PAR) intensities [395 and 1350molm(-2)s(-1), low light (LL) and high light (HL)] for 9d in sun simulators. Our study indicates that UV-B component of sunlight stimulates CO2 assimilation and stomatal conductance, depending on background light. UV-B-specific induction of apigenin and cyanidin glycosides was observed in both green and white tissues. However, all the other phenolic subclasses were up to four times more abundant in green leaf tissue. Caffeic and rosmarinic acids, catechin and epicatechin, which are endogenous peroxidase substrates, were depleted at HL in green tissue. This was correlated with increased peroxidase and ascorbate peroxidase activities and increased ascorbate content. The UV-B supplement to HL attenuated antioxidative metabolism and partly recovered the phenolic pool indicating stimulation of the phenylpropanoid pathway. In summary, we propose that ortho-dihydroxy phenolics are involved in antioxidative defence in chlorophyllous tissue upon light excess, while apigenin and cyanidin in white tissue have preferentially UV-screening function.
PB  - Wiley, Hoboken
T2  - Plant Cell and Environment
T1  - Ultraviolet-B component of sunlight stimulates photosynthesis and flavonoid accumulation in variegated Plectranthus coleoides leaves depending on background light
EP  - 979
IS  - 5
SP  - 968
VL  - 38
DO  - 10.1111/pce.12471
ER  - 

@article{
author = "Vidović, Marija and Morina, Filis and Milić Komić, Sonja and Zechmann, Bernd and Albert, Andreas and Winkler, Jana Barbro and Veljović-Jovanović, Sonja",
year = "2015",
abstract = "We used variegated Plectranthus coleoides as a model plant with the aim of clarifying whether the effects of realistic ultraviolet-B (UV-B) doses on phenolic metabolism in leaves are mediated by photosynthesis. Plants were exposed to UV-B radiation (0.90Wm(-2)) combined with two photosynthetically active radiation (PAR) intensities [395 and 1350molm(-2)s(-1), low light (LL) and high light (HL)] for 9d in sun simulators. Our study indicates that UV-B component of sunlight stimulates CO2 assimilation and stomatal conductance, depending on background light. UV-B-specific induction of apigenin and cyanidin glycosides was observed in both green and white tissues. However, all the other phenolic subclasses were up to four times more abundant in green leaf tissue. Caffeic and rosmarinic acids, catechin and epicatechin, which are endogenous peroxidase substrates, were depleted at HL in green tissue. This was correlated with increased peroxidase and ascorbate peroxidase activities and increased ascorbate content. The UV-B supplement to HL attenuated antioxidative metabolism and partly recovered the phenolic pool indicating stimulation of the phenylpropanoid pathway. In summary, we propose that ortho-dihydroxy phenolics are involved in antioxidative defence in chlorophyllous tissue upon light excess, while apigenin and cyanidin in white tissue have preferentially UV-screening function.",
publisher = "Wiley, Hoboken",
journal = "Plant Cell and Environment",
title = "Ultraviolet-B component of sunlight stimulates photosynthesis and flavonoid accumulation in variegated Plectranthus coleoides leaves depending on background light",
pages = "979-968",
number = "5",
volume = "38",
doi = "10.1111/pce.12471"
}

Vidović, M., Morina, F., Milić Komić, S., Zechmann, B., Albert, A., Winkler, J. B.,& Veljović-Jovanović, S.. (2015). Ultraviolet-B component of sunlight stimulates photosynthesis and flavonoid accumulation in variegated Plectranthus coleoides leaves depending on background light. in Plant Cell and Environment
Wiley, Hoboken., 38(5), 968-979.
https://doi.org/10.1111/pce.12471

Vidović M, Morina F, Milić Komić S, Zechmann B, Albert A, Winkler JB, Veljović-Jovanović S. Ultraviolet-B component of sunlight stimulates photosynthesis and flavonoid accumulation in variegated Plectranthus coleoides leaves depending on background light. in Plant Cell and Environment. 2015;38(5):968-979.
doi:10.1111/pce.12471 .

Vidović, Marija, Morina, Filis, Milić Komić, Sonja, Zechmann, Bernd, Albert, Andreas, Winkler, Jana Barbro, Veljović-Jovanović, Sonja, "Ultraviolet-B component of sunlight stimulates photosynthesis and flavonoid accumulation in variegated Plectranthus coleoides leaves depending on background light" in Plant Cell and Environment, 38, no. 5 (2015):968-979,
https://doi.org/10.1111/pce.12471 . .

TY  - JOUR
AU  - Vidović, Marija
AU  - Morina, Filis
AU  - Milić Komić, Sonja
AU  - Albert, Andreas
AU  - Zechmann, Bernd
AU  - Tosti, Tomislav
AU  - Winkler, Jana Barbro
AU  - Veljović-Jovanović, Sonja
PY  - 2015
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/858
AB  - We studied the specific effects of high photosynthetically active radiation (PAR, 400-700 nm) and ecologically relevant UV-B radiation (0.90 W m(-2)) on antioxidative and phenolic metabolism by exploiting the green-white leaf variegation of Pelargonium zonale plants. This is a suitable model system for examining "source-sink" interactions within the same leaf. High PAR intensity (1350 mu mol m(-2) s(-1)) and UV-B radiation induced different responses in green and white leaf sectors. High PAR intensity had a greater influence on green tissue, triggering the accumulation of phenylpropanoids and flavonoids with strong antioxidative function. Induced phenolics, together with ascorbate, ascorbate peroxidase (APX, EC 1.11.1.11) and catalase (CAT, EC 1.11.1.6) provided efficient defense against potential oxidative pressure. UV-B-induced up-regulation of non-phenolic H2O2 scavengers in green leaf sectors was greater than high PAR-induced changes, indicating a UV-B role in antioxidative defense under light excess; on the contrary, minimal effects were observed in white tissue. However, UV-B radiation had greater influence on phenolics in white leaf sections compared to green ones, inducing accumulation of phenolic glycosides whose function was UV-B screening rather than antioxidative. By stimulation of starch and sucrose breakdown and carbon allocation in the form of soluble sugars from "source" (green) tissue to "sink" (white) tissue, UV-B radiation compensated the absence of photosynthetic activity and phenylpropanoid and flavonoid biosynthesis in white sectors.
PB  - Elsevier France-Editions Scientifiques Medicales Elsevier, Issy-Les-Moulineaux
T2  - Plant Physiology and Biochemistry
T1  - Carbon allocation from source to sink leaf tissue in relation to flavonoid biosynthesis in variegated Pelargonium zonale under UV-B radiation and high PAR intensity
EP  - 55
SP  - 44
VL  - 93
DO  - 10.1016/j.plaphy.2015.01.008
ER  - 

@article{
author = "Vidović, Marija and Morina, Filis and Milić Komić, Sonja and Albert, Andreas and Zechmann, Bernd and Tosti, Tomislav and Winkler, Jana Barbro and Veljović-Jovanović, Sonja",
year = "2015",
abstract = "We studied the specific effects of high photosynthetically active radiation (PAR, 400-700 nm) and ecologically relevant UV-B radiation (0.90 W m(-2)) on antioxidative and phenolic metabolism by exploiting the green-white leaf variegation of Pelargonium zonale plants. This is a suitable model system for examining "source-sink" interactions within the same leaf. High PAR intensity (1350 mu mol m(-2) s(-1)) and UV-B radiation induced different responses in green and white leaf sectors. High PAR intensity had a greater influence on green tissue, triggering the accumulation of phenylpropanoids and flavonoids with strong antioxidative function. Induced phenolics, together with ascorbate, ascorbate peroxidase (APX, EC 1.11.1.11) and catalase (CAT, EC 1.11.1.6) provided efficient defense against potential oxidative pressure. UV-B-induced up-regulation of non-phenolic H2O2 scavengers in green leaf sectors was greater than high PAR-induced changes, indicating a UV-B role in antioxidative defense under light excess; on the contrary, minimal effects were observed in white tissue. However, UV-B radiation had greater influence on phenolics in white leaf sections compared to green ones, inducing accumulation of phenolic glycosides whose function was UV-B screening rather than antioxidative. By stimulation of starch and sucrose breakdown and carbon allocation in the form of soluble sugars from "source" (green) tissue to "sink" (white) tissue, UV-B radiation compensated the absence of photosynthetic activity and phenylpropanoid and flavonoid biosynthesis in white sectors.",
publisher = "Elsevier France-Editions Scientifiques Medicales Elsevier, Issy-Les-Moulineaux",
journal = "Plant Physiology and Biochemistry",
title = "Carbon allocation from source to sink leaf tissue in relation to flavonoid biosynthesis in variegated Pelargonium zonale under UV-B radiation and high PAR intensity",
pages = "55-44",
volume = "93",
doi = "10.1016/j.plaphy.2015.01.008"
}

Vidović, M., Morina, F., Milić Komić, S., Albert, A., Zechmann, B., Tosti, T., Winkler, J. B.,& Veljović-Jovanović, S.. (2015). Carbon allocation from source to sink leaf tissue in relation to flavonoid biosynthesis in variegated Pelargonium zonale under UV-B radiation and high PAR intensity. in Plant Physiology and Biochemistry
Elsevier France-Editions Scientifiques Medicales Elsevier, Issy-Les-Moulineaux., 93, 44-55.
https://doi.org/10.1016/j.plaphy.2015.01.008

Vidović M, Morina F, Milić Komić S, Albert A, Zechmann B, Tosti T, Winkler JB, Veljović-Jovanović S. Carbon allocation from source to sink leaf tissue in relation to flavonoid biosynthesis in variegated Pelargonium zonale under UV-B radiation and high PAR intensity. in Plant Physiology and Biochemistry. 2015;93:44-55.
doi:10.1016/j.plaphy.2015.01.008 .

Vidović, Marija, Morina, Filis, Milić Komić, Sonja, Albert, Andreas, Zechmann, Bernd, Tosti, Tomislav, Winkler, Jana Barbro, Veljović-Jovanović, Sonja, "Carbon allocation from source to sink leaf tissue in relation to flavonoid biosynthesis in variegated Pelargonium zonale under UV-B radiation and high PAR intensity" in Plant Physiology and Biochemistry, 93 (2015):44-55,
https://doi.org/10.1016/j.plaphy.2015.01.008 . .

TY  - JOUR
AU  - Comont, D
AU  - Martinez, Abaigar, Javier
AU  - Albert, Andreas
AU  - Aphalo, Pedro
AU  - Causton, David R.
AU  - Lopez, Figueroa, Felix
AU  - Gaberscik, Alenka
AU  - Llorens, Laura
AU  - Hauser, Marie-Theres
AU  - Jansen, Marcel A. K.
AU  - Kardefelt, Majlis
AU  - de, la Coba Luque, Paqui
AU  - Neubert, Susanne
AU  - Nunez-Olivera, Encarnacion
AU  - Olsen, Jorunn
AU  - Robson, Matthew
AU  - Schreiner, Monika
AU  - Sommaruga, Ruben
AU  - Strid, Ake
AU  - Torre, Sissel
AU  - Turunen, Minna
AU  - Veljović-Jovanović, Sonja
AU  - Verdaguer, Dolors
AU  - Vidović, Marija
AU  - Wagner, Johanna
AU  - Winkler, Jana Barbro
AU  - Zipoli, Gaetano
PY  - 2012
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/608
AB  - Lolium perenne (cv. AberDart) was grown at 14 locations along a latitudinal gradient across Europe (3768 degrees N) to study the impact of ultraviolet radiation (UV) and climate on aboveground growth and foliar UV-B absorbing compounds. At each location, plants were grown outdoors for 5 weeks in a replicated UV-B filtration experiment consisting of open, UV-B transparent (cellulose diacetate) and UV-B opaque (polyester) environments. Fourier transform-infrared spectroscopy was used to compare plant metabolite profiles in relation to treatment and location. UV radiation and climatic parameters were determined for each location from online sources and the data were assessed using a combination of anova and multiple regression analyses. Most of the variation in growth between the locations was attributable to the combination of climatic parameters, with minimum temperature identified as an important growth constraint. However, no single environmental parameter could consistently account for the variability in plant growth. Concentrations of foliar UV-B absorbing compounds showed a positive trend with solar UV across the latitudinal gradient; however, this relationship was not consistent in all treatments. The most striking experimental outcome from this study was the effect of presence or absence of filtration frames on UV-absorbing compounds. Overall, the study demonstrates the value of an European approach in studying the impacts of natural UV across a large latitudinal gradient. We have shown the feasibility of coordinated UV filtration at multiple sites but have also highlighted the need for open controls and careful interpretation of plant responses.
PB  - Wiley, Hoboken
T2  - Physiologia Plantarum
T1  - UV responses of Lolium perenne raised along a latitudinal gradient across Europe: a filtration study
EP  - 618
IS  - 4
SP  - 604
VL  - 145
DO  - 10.1111/j.1399-3054.2012.01591.x
ER  - 

@article{
author = "Comont, D and Martinez, Abaigar, Javier and Albert, Andreas and Aphalo, Pedro and Causton, David R. and Lopez, Figueroa, Felix and Gaberscik, Alenka and Llorens, Laura and Hauser, Marie-Theres and Jansen, Marcel A. K. and Kardefelt, Majlis and de, la Coba Luque, Paqui and Neubert, Susanne and Nunez-Olivera, Encarnacion and Olsen, Jorunn and Robson, Matthew and Schreiner, Monika and Sommaruga, Ruben and Strid, Ake and Torre, Sissel and Turunen, Minna and Veljović-Jovanović, Sonja and Verdaguer, Dolors and Vidović, Marija and Wagner, Johanna and Winkler, Jana Barbro and Zipoli, Gaetano",
year = "2012",
abstract = "Lolium perenne (cv. AberDart) was grown at 14 locations along a latitudinal gradient across Europe (3768 degrees N) to study the impact of ultraviolet radiation (UV) and climate on aboveground growth and foliar UV-B absorbing compounds. At each location, plants were grown outdoors for 5 weeks in a replicated UV-B filtration experiment consisting of open, UV-B transparent (cellulose diacetate) and UV-B opaque (polyester) environments. Fourier transform-infrared spectroscopy was used to compare plant metabolite profiles in relation to treatment and location. UV radiation and climatic parameters were determined for each location from online sources and the data were assessed using a combination of anova and multiple regression analyses. Most of the variation in growth between the locations was attributable to the combination of climatic parameters, with minimum temperature identified as an important growth constraint. However, no single environmental parameter could consistently account for the variability in plant growth. Concentrations of foliar UV-B absorbing compounds showed a positive trend with solar UV across the latitudinal gradient; however, this relationship was not consistent in all treatments. The most striking experimental outcome from this study was the effect of presence or absence of filtration frames on UV-absorbing compounds. Overall, the study demonstrates the value of an European approach in studying the impacts of natural UV across a large latitudinal gradient. We have shown the feasibility of coordinated UV filtration at multiple sites but have also highlighted the need for open controls and careful interpretation of plant responses.",
publisher = "Wiley, Hoboken",
journal = "Physiologia Plantarum",
title = "UV responses of Lolium perenne raised along a latitudinal gradient across Europe: a filtration study",
pages = "618-604",
number = "4",
volume = "145",
doi = "10.1111/j.1399-3054.2012.01591.x"
}

Comont, D., Martinez, A. J., Albert, A., Aphalo, P., Causton, D. R., Lopez, F. F., Gaberscik, A., Llorens, L., Hauser, M., Jansen, M. A. K., Kardefelt, M., de, l. C. L. P., Neubert, S., Nunez-Olivera, E., Olsen, J., Robson, M., Schreiner, M., Sommaruga, R., Strid, A., Torre, S., Turunen, M., Veljović-Jovanović, S., Verdaguer, D., Vidović, M., Wagner, J., Winkler, J. B.,& Zipoli, G.. (2012). UV responses of Lolium perenne raised along a latitudinal gradient across Europe: a filtration study. in Physiologia Plantarum
Wiley, Hoboken., 145(4), 604-618.
https://doi.org/10.1111/j.1399-3054.2012.01591.x

Comont D, Martinez AJ, Albert A, Aphalo P, Causton DR, Lopez FF, Gaberscik A, Llorens L, Hauser M, Jansen MAK, Kardefelt M, de LCLP, Neubert S, Nunez-Olivera E, Olsen J, Robson M, Schreiner M, Sommaruga R, Strid A, Torre S, Turunen M, Veljović-Jovanović S, Verdaguer D, Vidović M, Wagner J, Winkler JB, Zipoli G. UV responses of Lolium perenne raised along a latitudinal gradient across Europe: a filtration study. in Physiologia Plantarum. 2012;145(4):604-618.
doi:10.1111/j.1399-3054.2012.01591.x .

Comont, D, Martinez, Abaigar, Javier, Albert, Andreas, Aphalo, Pedro, Causton, David R., Lopez, Figueroa, Felix, Gaberscik, Alenka, Llorens, Laura, Hauser, Marie-Theres, Jansen, Marcel A. K., Kardefelt, Majlis, de, la Coba Luque, Paqui, Neubert, Susanne, Nunez-Olivera, Encarnacion, Olsen, Jorunn, Robson, Matthew, Schreiner, Monika, Sommaruga, Ruben, Strid, Ake, Torre, Sissel, Turunen, Minna, Veljović-Jovanović, Sonja, Verdaguer, Dolors, Vidović, Marija, Wagner, Johanna, Winkler, Jana Barbro, Zipoli, Gaetano, "UV responses of Lolium perenne raised along a latitudinal gradient across Europe: a filtration study" in Physiologia Plantarum, 145, no. 4 (2012):604-618,
https://doi.org/10.1111/j.1399-3054.2012.01591.x . .