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Title

Low endogenous NO levels in roots and antioxidant systems are determinants for the resistance of Arabidopsis seedlings grown in Cd

AuthorsTerrón-Camero, Laura Carmen; del Val, Coral; Sandalio, Luisa M. ; Romero-Puertas, María C.
Issue Date2020
PublisherElsevier
CitationEnvironmental Pollution, Volume 256, January 2020, Article number 113411
AbstractCadmium (Cd), which is a toxic non-essential heavy metal capable of entering plants and thus the food chain, constitutes a major environmental and health concern worldwide. An understanding of the tools used by plants to overcome Cd stress could lead to the production of food crops with lower Cd uptake capacity and of plants with greater Cd uptake potential for phytoremediation purposes in order to restore soil efficiency in self-sustaining ecosystems. The signalling molecule nitric oxide (NO), whose function remains unclear, has recently been involved in responses to Cd stress. Using different mutants, such as nia1nia2, nox1, argh1-1 and Atnoa1, which were altered in NO metabolism, we analysed various parameters related to reactive oxygen and nitrogen species (ROS/RNS) metabolism and seedling fitness following germination and growth under Cd treatment conditions for seven days. Seedling roots were the most affected, with an increase in ROS and RNS observed in wild type (WT) seedling roots, leading to increased oxidative damage and fitness loss. Mutants that showed lower NO levels in seedling roots under Cd stress were more resistant than WT seedlings due to the maintenance of antioxidant systems which protect against oxidative damage.
Publisher version (URL)http://dx.doi.org/10.1016/j.envpol.2019.113411
URIhttp://hdl.handle.net/10261/216762
DOIhttp://dx.doi.org/10.1016/j.envpol.2019.113411
Identifiersdoi: 10.1016/j.envpol.2019.113411
issn: 1873-6424
Appears in Collections:(EEZ) Artículos
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