| 000 | 02600nam a22003017a 4500 | ||
|---|---|---|---|
| 003 | ZW-GwMSU | ||
| 005 | 20241217072759.0 | ||
| 008 | 241217b |||||||| |||| 00| 0 eng d | ||
| 022 | _a0176-1617 | ||
| 040 |
_aMSU _bEnglish _cMSU _erda |
||
| 050 | 0 | 0 | _aQK711.2 JOU |
| 100 | 1 |
_aVidović, Marija _eauthor |
|
| 245 | 1 | 0 |
_aAntioxidative response in variegated Pelargonium zonale leaves and generation of extracellular H2O2 in (peri)vascular tissue induced by sunlight and paraquat _ccreated by Marija Vidović, Filis Morina, Ljiljana Prokić, Sonja Milić-Komić, Bojana Živanović, Sonja Veljović Jovanović |
| 264 | 1 |
_aAmsterdam: _bElsevier GmbH, _c2016. |
|
| 336 |
_2rdacontent _atext _btxt |
||
| 337 |
_2rdamedia _aunmediated _bn |
||
| 338 |
_2rdacarrier _avolume _bnc |
||
| 440 |
_aJournal of plant physiology _vVolume 206 |
||
| 520 | 3 | _aIn this study we exposed variegated leaves of Pelargonium zonale to strong sunlight (>1100μmolm-2s-1 of photosynthetically active radiation) with and without paraquat (Pq), with the aim to elucidate the mechanisms of H2O2 regulation in green and white tissues with respect to the photosynthetically-dependent generation of reactive oxygen species (ROS). Sunlight induced marked accumulation of H2O2 in the apoplast of vascular and (peri)vascular tissues only in green sectors. This effect was enhanced by the addition of Pq. In the presence of diphenyl iodide, an NADPH oxidase inhibitor, H2O2 accumulation was abolished. Distinct light-induced responses were observed: in photosynthetic cells, sunlight rapidly provoked ascorbate (Asc) biosynthesis and an increase of glutathione reductase (GR) and catalase activities, while in non-photosynthetic cells, early up-regulation of soluble ascorbate peroxidase, dehydroascorbate reductase (DHAR) and GR activities was observed. Paraquat addition stimulated DHAR and GR activities in green sectors, while in white sectors activities of monodehydroascorbate reductase, DHAR and class III peroxidases, as well as Asc content rapidly increased. Differential antioxidative responses in the two tissues in the frame of their contrasting metabolisms, and the possible role of (peri)vascular H2O2 in signaling were discussed. | |
| 650 |
_aAbscisic acid _vAscorbate-glutathione cycle _xHydrogen peroxide |
||
| 700 | 1 |
_aMorina, Filis _eco-author |
|
| 700 | 1 |
_aProkić, Ljiljana _eco-author |
|
| 700 | 1 |
_aMilić-Komić, Sonja _eco-author |
|
| 700 | 1 |
_aŽivanović, Bojana _eco-author |
|
| 700 | 1 |
_aJovanović, Sonja Veljović _eco-author |
|
| 856 | _uhttps://doi.org/10.1016/j.jplph.2016.07.017 | ||
| 942 |
_2lcc _cJA |
||
| 999 |
_c168914 _d168914 |
||