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Ecotoxicology and environmental safety v.147, 2018년, pp.93 - 101   SCI SCIE
본 등재정보는 저널의 등재정보를 참고하여 보여주는 베타서비스로 정확한 논문의 등재여부는 등재기관에 확인하시기 바랍니다.

The intensity of tyrosine nitration is associated with selenite and selenate toxicity in Brassica juncea L.

Molnár, Árpád (Corresponding author. ); Feigl, Gábor ( ); Trifán, Vanda ( ); Ördög, Attila ( ); Szőllősi, Réka ( ); Erdei, László ( ); Kolbert, Zsuzsanna ( );
  • 초록  

    Abstract Selenium phytotoxicity involves processes like reactive nitrogen species overproduction and nitrosative protein modifications. This study evaluates the toxicity of two selenium forms (selenite and selenate at 0μM, 20μM, 50μM and 100μM concentrations) and its correlation with protein tyrosine nitration in the organs of hydroponically grown Indian mustard (Brassica juncea L.). Selenate treatment resulted in large selenium accumulation in both Brassica organs, while selenite showed slight root-to-shoot translocation resulting in a much lower selenium accumulation in the shoot. Shoot and root growth inhibition and cell viability loss revealed that Brassica tolerates selenate better than selenite. Results also show that relative high amounts of selenium are able to accumulate in Brassica leaves without obvious visible symptoms such as chlorosis or necrosis. The more severe phytotoxicity of selenite was accompanied by more intense protein tyrosine nitration as well as alterations in nitration pattern suggesting a correlation between the degree of Se forms-induced toxicities and nitroproteome size, composition in Brassica organs. These results imply the possibility of considering protein tyrosine nitration as novel biomarker of selenium phytotoxicity, which could help the evaluation of asymptomatic selenium stress of plants. Highlights Selenite is more toxic to Brassica than selenate in hydroponics. The toxicity of selenite correlates with the nitroproteome size of plant organs. Protein nitration can be considered as a biomarker of asymptomatic selenium stress.


  • 주제어

    Brassica juncea .   Nitric oxide .   Protein tyrosine nitration .   Reactive nitrogen species .   Selenite .   Selenate.  

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