Stevanović, Branka

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  • Stevanović, Branka (1)
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Senescence- and drought-related changes in peroxidase and superoxide dismutase isoforms in leaves of Ramonda serbica

Veljović-Jovanović, Sonja; Kukavica, Biljana; Stevanović, Branka; Navari-Izzo, Flavia

(Oxford Univ Press, Oxford, 2006)

TY  - JOUR
AU  - Veljović-Jovanović, Sonja
AU  - Kukavica, Biljana
AU  - Stevanović, Branka
AU  - Navari-Izzo, Flavia
PY  - 2006
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/154
AB  - Ramonda sp. (Gesneriaceae) is an endemic and relic plant in a very small group of poikilohydric angiosperms that are able to survive in an almost completely dehydrated state. Senescence- and drought-related changes in the activity of peroxidase (POD; EC 1.11.1.7), ascorbate peroxidase (EC 1.11.1.11), and superoxide dismutase (SOD; EC 1.15.1.1) were determined in leaves of different age and relative water content. The results indicate that different POD isoforms were stimulated during senescence and dehydration. Two of the soluble POD isoforms were anionic with pI 4.5, and two were cationic with pI 9.3 and 9.0. The activity of ascorbate peroxidase remained unchanged either by drought or senescence. For the first time, SOD isoforms have now been determined in this resurrection plant. Several SOD isoforms, all of the Mn type, were found to be anionic with pI 4 and a few others had pI from 5 to 6, while one band of FeSOD with a lower molecular weight was neutral. Rehydration brought about a remarkable decrease over the first hour in the activity of all the antioxidant enzymes examined but activity recovered 1 d after rehydration. The results confirmed that dehydration and senescence caused disturbance in the redox homeostasis of Ramonda leaves, while inducing different POD isoforms. A physiological role of peroxidase reaction with hydroxycinnamic acids in conservation and protection of cellular constituents of desiccated Ramonda leaves is suggested.
PB  - Oxford Univ Press, Oxford
T2  - Journal of Experimental Botany
T1  - Senescence- and drought-related changes in peroxidase and superoxide dismutase isoforms in leaves of Ramonda serbica
EP  - 1768
IS  - 8
SP  - 1759
VL  - 57
DO  - 10.1093/jxb/erl007
ER  - 
@article{
author = "Veljović-Jovanović, Sonja and Kukavica, Biljana and Stevanović, Branka and Navari-Izzo, Flavia",
year = "2006",
abstract = "Ramonda sp. (Gesneriaceae) is an endemic and relic plant in a very small group of poikilohydric angiosperms that are able to survive in an almost completely dehydrated state. Senescence- and drought-related changes in the activity of peroxidase (POD; EC 1.11.1.7), ascorbate peroxidase (EC 1.11.1.11), and superoxide dismutase (SOD; EC 1.15.1.1) were determined in leaves of different age and relative water content. The results indicate that different POD isoforms were stimulated during senescence and dehydration. Two of the soluble POD isoforms were anionic with pI 4.5, and two were cationic with pI 9.3 and 9.0. The activity of ascorbate peroxidase remained unchanged either by drought or senescence. For the first time, SOD isoforms have now been determined in this resurrection plant. Several SOD isoforms, all of the Mn type, were found to be anionic with pI 4 and a few others had pI from 5 to 6, while one band of FeSOD with a lower molecular weight was neutral. Rehydration brought about a remarkable decrease over the first hour in the activity of all the antioxidant enzymes examined but activity recovered 1 d after rehydration. The results confirmed that dehydration and senescence caused disturbance in the redox homeostasis of Ramonda leaves, while inducing different POD isoforms. A physiological role of peroxidase reaction with hydroxycinnamic acids in conservation and protection of cellular constituents of desiccated Ramonda leaves is suggested.",
publisher = "Oxford Univ Press, Oxford",
journal = "Journal of Experimental Botany",
title = "Senescence- and drought-related changes in peroxidase and superoxide dismutase isoforms in leaves of Ramonda serbica",
pages = "1768-1759",
number = "8",
volume = "57",
doi = "10.1093/jxb/erl007"
}
Veljović-Jovanović, S., Kukavica, B., Stevanović, B.,& Navari-Izzo, F.. (2006). Senescence- and drought-related changes in peroxidase and superoxide dismutase isoforms in leaves of Ramonda serbica. in Journal of Experimental Botany
Oxford Univ Press, Oxford., 57(8), 1759-1768.
https://doi.org/10.1093/jxb/erl007
Veljović-Jovanović S, Kukavica B, Stevanović B, Navari-Izzo F. Senescence- and drought-related changes in peroxidase and superoxide dismutase isoforms in leaves of Ramonda serbica. in Journal of Experimental Botany. 2006;57(8):1759-1768.
doi:10.1093/jxb/erl007 .
Veljović-Jovanović, Sonja, Kukavica, Biljana, Stevanović, Branka, Navari-Izzo, Flavia, "Senescence- and drought-related changes in peroxidase and superoxide dismutase isoforms in leaves of Ramonda serbica" in Journal of Experimental Botany, 57, no. 8 (2006):1759-1768,
https://doi.org/10.1093/jxb/erl007 . .
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