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Zinc-induced root architectural changes of rhizotron-grown B. napus correlate with a differential nitro-oxidative response.
Nitric Oxide. 2019 09 01; 90:55-65.NO

Abstract

Roots have a noteworthy plasticity: due to different stress conditions their architecture can change to favour seedling vigour and yield stability. The development of the root system is regulated by a complex and diverse signalling network, which besides hormonal factors, includes reactive oxygen (ROS) - and nitrogen species (RNS). The delicate balance of the endogenous signal system can be affected by various environmental stimuli, such as the excess of essential heavy metals, like zinc (Zn). Zn at low concentration, is able to induce the morphological and physiological adaptation of the root system, but in excess it exerts toxic effects on plants. In this study the effect of a low, growth-inducing, and a high, growth inhibiting Zn concentrations on the early development of Brassica napus (L.) root architecture and the underlying nitro-oxidative mechanisms were studied in a soil-filled rhizotron system. The growth-inhibiting Zn treatment resulted in elevated protein tyrosine nitration due to the imbalance in ROS and RNS homeostasis, however its pattern was not changed compared to the control. This nitro-oxidative stress was accompanied by serious changes in the cell wall composition and decrease in the cell proliferation and viability, due to the high Zn uptake and disturbed microelement homeostasis in the root tips. During the positive root growth response, a tyrosine nitration-pattern reorganisation was observed; there were no substantial changes in ROS and RNS balance and the viability and proliferation of the root tips' meristematic zone decreased to a lesser extent, as a result of a lower Zn uptake. The obtained results suggest that Zn in different amounts triggers different root growth responses accompanied by distinct changes in the pattern and strength of tyrosine nitration, proposing that nitrosative processes have an important role in the stress-induced root growth responses.

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Authors+Show Affiliations

Feigl G
Department of Plant Biology, University of Szeged, H6726, Szeged, Közép Fasor 52, Hungary. Electronic address: feigl@bio.u-szeged.hu.
Molnár Á
Department of Plant Biology, University of Szeged, H6726, Szeged, Közép Fasor 52, Hungary. Electronic address: molnara@bio.u-szeged.hu.
Szőllősi R
Department of Plant Biology, University of Szeged, H6726, Szeged, Közép Fasor 52, Hungary. Electronic address: szoszo@bio.u-szeged.hu.
Ördög A
Department of Plant Biology, University of Szeged, H6726, Szeged, Közép Fasor 52, Hungary. Electronic address: aordog@bio.u-szeged.hu.
Törőcsik K
Department of Plant Biology, University of Szeged, H6726, Szeged, Közép Fasor 52, Hungary. Electronic address: kittitorocsik@gmail.com.
Oláh D
Department of Plant Biology, University of Szeged, H6726, Szeged, Közép Fasor 52, Hungary. Electronic address: olah.dora18@citromail.hu.
Bodor A
Department of Biotechnology, University of Szeged, H6726, Szeged, Közép Fasor 52, Hungary; Institute of Environmental and Technological Sciences, University of Szeged, H6726, Szeged, Közép Fasor 52, Hungary. Electronic address: bodor.attila@gmail.com.
Perei K
Department of Biotechnology, University of Szeged, H6726, Szeged, Közép Fasor 52, Hungary; Institute of Environmental and Technological Sciences, University of Szeged, H6726, Szeged, Közép Fasor 52, Hungary. Electronic address: perei@bio.u-szeged.hu.
Kolbert Z
Department of Plant Biology, University of Szeged, H6726, Szeged, Közép Fasor 52, Hungary. Electronic address: kolzsu@bio.u-szeged.hu.

MeSH

Brassica napusOxidation-ReductionOxidative StressPlant RootsReactive Nitrogen SpeciesReactive Oxygen SpeciesZinc

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

31271864

Citation

Feigl, Gábor, et al. "Zinc-induced Root Architectural Changes of Rhizotron-grown B. Napus Correlate With a Differential Nitro-oxidative Response." Nitric Oxide : Biology and Chemistry, vol. 90, 2019, pp. 55-65.
Feigl G, Molnár Á, Szőllősi R, et al. Zinc-induced root architectural changes of rhizotron-grown B. napus correlate with a differential nitro-oxidative response. Nitric Oxide. 2019;90:55-65.
Feigl, G., Molnár, Á., Szőllősi, R., Ördög, A., Törőcsik, K., Oláh, D., Bodor, A., Perei, K., & Kolbert, Z. (2019). Zinc-induced root architectural changes of rhizotron-grown B. napus correlate with a differential nitro-oxidative response. Nitric Oxide : Biology and Chemistry, 90, 55-65. https://doi.org/10.1016/j.niox.2019.06.003
Feigl G, et al. Zinc-induced Root Architectural Changes of Rhizotron-grown B. Napus Correlate With a Differential Nitro-oxidative Response. Nitric Oxide. 2019 09 1;90:55-65. PubMed PMID: 31271864.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Zinc-induced root architectural changes of rhizotron-grown B. napus correlate with a differential nitro-oxidative response. AU - Feigl,Gábor, AU - Molnár,Árpád, AU - Szőllősi,Réka, AU - Ördög,Attila, AU - Törőcsik,Kitti, AU - Oláh,Dóra, AU - Bodor,Attila, AU - Perei,Katalin, AU - Kolbert,Zsuzsanna, Y1 - 2019/07/01/ PY - 2019/03/06/received PY - 2019/06/27/revised PY - 2019/06/28/accepted PY - 2019/7/5/pubmed PY - 2020/5/6/medline PY - 2019/7/5/entrez KW - Brassica napus KW - Nitro-oxidative stress KW - Nitrosative stress KW - Protein tyrosine nitration KW - Root growth KW - Zinc SP - 55 EP - 65 JF - Nitric oxide : biology and chemistry JO - Nitric Oxide VL - 90 N2 - Roots have a noteworthy plasticity: due to different stress conditions their architecture can change to favour seedling vigour and yield stability. The development of the root system is regulated by a complex and diverse signalling network, which besides hormonal factors, includes reactive oxygen (ROS) - and nitrogen species (RNS). The delicate balance of the endogenous signal system can be affected by various environmental stimuli, such as the excess of essential heavy metals, like zinc (Zn). Zn at low concentration, is able to induce the morphological and physiological adaptation of the root system, but in excess it exerts toxic effects on plants. In this study the effect of a low, growth-inducing, and a high, growth inhibiting Zn concentrations on the early development of Brassica napus (L.) root architecture and the underlying nitro-oxidative mechanisms were studied in a soil-filled rhizotron system. The growth-inhibiting Zn treatment resulted in elevated protein tyrosine nitration due to the imbalance in ROS and RNS homeostasis, however its pattern was not changed compared to the control. This nitro-oxidative stress was accompanied by serious changes in the cell wall composition and decrease in the cell proliferation and viability, due to the high Zn uptake and disturbed microelement homeostasis in the root tips. During the positive root growth response, a tyrosine nitration-pattern reorganisation was observed; there were no substantial changes in ROS and RNS balance and the viability and proliferation of the root tips' meristematic zone decreased to a lesser extent, as a result of a lower Zn uptake. The obtained results suggest that Zn in different amounts triggers different root growth responses accompanied by distinct changes in the pattern and strength of tyrosine nitration, proposing that nitrosative processes have an important role in the stress-induced root growth responses. SN - 1089-8611 UR - https://www.unboundmedicine.com/medline/citation/31271864/Zinc_induced_root_architectural_changes_of_rhizotron_grown_B__napus_correlate_with_a_differential_nitro_oxidative_response_ DB - PRIME DP - Unbound Medicine ER -