@article{BARROS JUNIOR_LIMA_BARBOSA_BATISTA_LOBATO_2016, title={Biochemical Responses of Two Species of Eucalyptus Exposed to Aluminium Toxicity: Oxidative Stress and Antioxidant Metabolism}, volume={44}, url={https://notulaebotanicae.ro/index.php/nbha/article/view/10124}, DOI={10.15835/nbha44110124}, abstractNote={<p>In response to oxidative damage resulting from overproduction of reactive oxygen species, plants have developed complex and efficient antioxidant machinery. The aims of this research were to measure composts used as stress indicators, quantifying non-enzymatic compounds and activities of antioxidant enzymes, and to explain probable differences between two species of the gender <em>Eucalyptus</em> exposed to low and high aluminium. The experiment employed a factorial that was entirely randomised, with two species (<em>Eucalyptus platyphylla </em>and <em>E. grandis</em>) combined with aluminium concentrations (and 0.08 and 1.60 mM Al, which are described as low and high Al, respectively). This study revealed that the <em>E. platyphylla </em>presented intense modifications on malondialdehyde and electrolyte leakage in leaf and root, being also detected increases to oxidized glutathione, reduced glutathione and total glutathione. In addition, <em>E. platyphylla </em>had strong accumulations linked to superoxide and hydrogen peroxide, while <em>E. grandis</em> were detected minor alterations to both tissues. In relation to superoxide dismutase, catalase, ascorbate peroxidase and peroxidase were showed similar behaviours, with higher activities in <em>E. grandis</em>, if compared to <em>E. platyphylla</em>. Therefore, is possible to conclude that <em>E. grandis</em> is more tolerant to aluminium due to minor production of reactive oxygen species and decreased alterations on stress indicators. Concomitantly, the antioxidant enzymes effectively contribute to reduce the oxidative stress generated in root and leaf of <em>E. grandis</em> exposed to high aluminium.</p>}, number={1}, journal={Notulae Botanicae Horti Agrobotanici Cluj-Napoca}, author={BARROS JUNIOR, Udson Oliveira and LIMA, Michael Douglas Roque and BARBOSA, Maria Antonia Machado and BATISTA, Bruno Lemos and LOBATO, Allan Klynger da Silva}, year={2016}, month={Jun.}, pages={107–115} }