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The transition from juvenility through maturation to senescence is a complex process that involves the regulation of longevity. Here, we identify JUNGBRUNNEN1 (JUB1), a hydrogen peroxide (H(2)O(2))-induced NAC transcription factor, as a central longevity regulator in Arabidopsis thaliana. JUB1 overexpression strongly delays senescence, dampens intracellular(More)
Plant-derived vitamins are of great interest because of their impact on human health. They are essential for metabolism because of their redox chemistry and role as enzymatic cofactors, not only in animals but also in plants. Several vitamins have strong antioxidant potential, including both water-soluble (vitamins B and C) and lipid-soluble (vitamins A, E(More)
The role of abscisic acid (ABA) and salicylic acid (SA) in salt stress tolerance was studied in Arabidopsis thaliana using mutants that show a defect in hormone biosynthesis or signaling. Plants were subjected to either control conditions (irrigated with nutrient solution) or a moderate salt stress (nutrient solution + 100 mM NaCl), and the response of the(More)
Plants are often exposed to a combination of stresses, which can occur simultaneously or at different times throughout their life. In this study, the effects of salinity, drought and cadmium pre-treatments were evaluated on the subsequent response of Cakile maritima, a halophytic species, to various levels of salinity (from 100 to 800 mM NaCl) after a(More)
To better understand the role of ethylene signaling in plant stress tolerance, salt-induced changes in gene expression levels of ethylene biosynthesis, perception and signaling genes were measured in Arabidopsis thaliana plants exposed to 15 days of salinity. Among the genes analyzed, EIN3 showed the highest expression level increase under salt stress,(More)
Tocopherol cyclase, encoded by the gene SUCROSE EXPORT DEFECTIVE1, catalyses the second step in the synthesis of the antioxidant tocopherol. Depletion of SXD1 activity in maize and potato leaves leads to tocopherol deficiency and a 'sugar export block' phenotype that comprises massive starch accumulation and obstruction of plasmodesmata in paraveinal tissue(More)
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