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Withdrawal from functional Crassulacean acid metabolism (CAM) is accompanied by changes in both gene expression and activity of antioxidative enzymes

Nosek, Michał ; Gawrońska, Katarzyna ; Rozpądek, Piotr ; Szechyńska-Hebda, Magdalena ; Kornaś, Andrzej ; Miszalski, Zbigniew

Journal of plant physiology, 2018-10, Vol.229, p.151-157 [Periódico revisado por pares]

Germany: Elsevier GmbH

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Título:
Withdrawal from functional Crassulacean acid metabolism (CAM) is accompanied by changes in both gene expression and activity of antioxidative enzymes
Autor: Nosek, Michał ; Gawrońska, Katarzyna ; Rozpądek, Piotr ; Szechyńska-Hebda, Magdalena ; Kornaś, Andrzej ; Miszalski, Zbigniew
Assuntos: Antioxidants ; Ascorbic acid ; CAM reversibility ; Carbon ; Carboxylase ; Catalase ; Crassulacean acid metabolism ; Desalination ; Enzymatic activity ; Enzyme activity ; Enzymes ; Flowers & plants ; Gene expression ; Growth media ; L-Ascorbate peroxidase ; Malate ; Mesembryanthemum crystallinum ; Metabolism ; Organic chemicals ; Peroxidase ; Phosphoenolpyruvate carboxylase ; Plant growth ; Proteins ; Salinity stress ; Sodium chloride ; Superoxide dismutase ; Zinc
É parte de: Journal of plant physiology, 2018-10, Vol.229, p.151-157
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
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Descrição: In Mesembryanthemum crystallinum, crassulacean acid metabolism (CAM) is seemingly reversible, but unequivocal evidence for functional CAM withdrawal has yet to be shown. In this study, we confirmed the rapid downregulation of PEPC1 expression just 1 h after the removal of NaCl from the plant growth media. At the same time, the Δ malate values in desalted plants rapidly (1 d) re-established to values typical for C3 plants. This phenomenon allowed us to confirm functional CAM withdrawal in the desalted plants. Desalting altered the expression of the genes of the main antioxidative enzymes and/or the activity of their respective proteins; for catalase (CAT), both gene expression and protein activity were restored to levels observed in C3 plants in response to desalting, while for cooper-zinc superoxide dismutase (CuZnSOD) and ascorbate peroxidase (APX), only protein activity was restored. Therefore, we conclude that during the C3→CAM transition the CAM-specific antioxidative enzyme activity profile constitutes a transient and fully reversible response to abiotic stress.
Editor: Germany: Elsevier GmbH
Idioma: Inglês

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Withdrawal from functional Crassulacean acid metabolism (CAM) is accompanied by changes in both gene expression and activity of antioxidative enzymes

Nosek, Michał ; Gawrońska, Katarzyna ; Rozpądek, Piotr ; Szechyńska-Hebda, Magdalena ; Kornaś, Andrzej ; Miszalski, Zbigniew

Germany: Elsevier GmbH

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