Antioxidant system in programmed cell death of sycamore (Acer pseudoplatanus L.) cultured cells

• Autorzy: Contran N. , Tonelli M. , Crosti P. , Cerana R. , Malerba M.
• Języki publikacji: EN

Abstrakty

EN

Reactive oxygen species (ROS) have pleiotropic effects in plants. ROS can lead to cellular damage and death or play key roles in control and regulation of biological processes, such as programmed cell death (PCD). This dual role of ROS, as toxic or signalling molecules, is possible because plant antioxidant system (AS) is able to achieve a tight control over ROS cellular levels, balancing properly their production and scavenging. AS response in plant PCD has been clearly described only in the hypersensitive response in incompatible plant–pathogen interactions and in the senescence process and has not been completely unravelled. In sycamore (Acer pseudoplatanus L.) cultured cells PCD can be induced by Fusicoccin (Fc), Tunicamycin (Tu), and Brefeldin A (Ba). These chemicals induce comparable PCD time course and extent, while H₂O₂ production is detectable only in Fc- and, to a lesser extent, in Ba-treated cells. In this paper the AS has been investigated during PCD of sycamore cells, measuring the effects of the three inducers on the cellular levels of non-enzymatic and enzymatic antioxidants. Results show that the AS behaviour is different in the PCD induced by the three chemicals. In Fc-treated cells AS is mainly devoted to decrease the concentration of toxic intracellular H₂O₂ levels. On the contrary, in cells treated with Tu and Ba, the cell redox state is shifted to a more reduced state and the enzymatic AS is partially downregulated, allowing ROS to act as signalling molecules.

• Wydawca: -
• Czasopismo: Acta Physiologiae Plantarum
• Rocznik: 2012
• Tom: 34
• Numer: 2
• Opis fizyczny: p.617-629,fig.,ref.

Twórcy

autor

Contran N.

• Department of Biotechnology and Biosciences, University of Milano-Bicocca, Piazza della Scienza 2, 20126 Milan, Italy

autor

Tonelli M.

• Department of Biotechnology and Biosciences, University of Milano-Bicocca, Piazza della Scienza 2, 20126 Milan, Italy

autor

Crosti P.

• Department of Biotechnology and Biosciences, University of Milano-Bicocca, Piazza della Scienza 2, 20126 Milan, Italy

autor

Cerana R.

• Department of Environmental Sciences, University of Milano-Bicocca, P.zza della Scienza 1, 20126 Milan, Italy

autor

Malerba M.

• Department of Biotechnology and Biosciences, University of Milano-Bicocca, Piazza della Scienza 2, 20126 Milan, Italy

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