Attenuation of mercury phytotoxicity with a high nutritional level of nitrate in alfalfa plants grown hydroponically
EntityUAM. Departamento de Biología
10.1016/j.stress.2023.100131Plant Stress 7 (2023): 100131
SubjectsMedicago Sativa; Mercury; Nitrate Nutrition; Oxidative Stress; Tolerance; Biología y Biomedicina / Biología
Rights© 2023 The Authors. Published by Elsevier B.V.
Esta obra está bajo una licencia de Creative Commons Reconocimiento-NoComercial-SinObraDerivada 4.0 Internacional.
Mercury (Hg) is one of the most dangerous pollutant heavy metals to the environment, which causes several toxic effects in plants upon accumulation, such as induction of oxidative stress. Nitrate (NO3 – ) is the prevalent form to incorporate nitrogen (N) in higher plants, through its reduction to nitrite (NO2 – ) by the enzyme nitrate reductase (NR). We studied the physiological alterations caused by Hg (0, 6 and 30 µM) in alfalfa plants grown at two different levels of NO3 – : low, (2 mM; LN), and high (12 mM; HN) for one week using a semi-hydroponic culture system. Several parameters of oxidative stress such as lipid peroxidation, chlorophyll content, biothiol concen tration, and ascorbate peroxidase (APX) and glutathione reductase (GR) activities showed that HN plants were less affected by Hg. Nitrate reductase activity and NO3 – concentration were also altered under Hg stress, with lower impact in plants nourished with high NO3 – . Our results highlight the importance of the NO3 – nutritional status to improve tolerance to toxic metals like Hg
Google Scholar:Carrasco-Gil, Sandra - Ortega Villasante, Cristina - Sobrino Plata, Juan - Barón Sola, Ángel - Millán, Rocío - Hernández Rodríguez, Luis Eduardo
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