Peroxisomes as a source of reactive oxygen species and nitric oxide signal molecules in plant cells
Peroxisomes as a source of reactive oxygen species and nitric oxide signal molecules in plant cells
- Trends in Plant Science, 6(4), p.145-150, 2001 .
The important role of plant peroxisomes in a variety of metabolic reactions such as photorespiration, fatty acid â-oxidation, the glyoxylate cycle and generation-degradation of hydrogen peroxide is well known. In recent years, the presence of a novel group of enzymes, mainly involved in the metabolism of oxygen free-radicals, has been shown in peroxisomes. In addition to hydrogen peroxide, peroxisomes can generate superoxide-radicals and nitric oxide, which are known cellular messengers with a variety of physiological roles in intra- and inter-cellular communication. Nitric oxide and hydrogen peroxide can permeate the peroxisomal membrane and superoxide radicals can be produced on the cytosolic side of the membrane. The signal moleculegenerating capacity of peroxisomes can have important implications for cellular metabolism in plants, particularly under biotic and abiotic stress.
The important role of plant peroxisomes in a variety of metabolic reactions such as photorespiration, fatty acid â-oxidation, the glyoxylate cycle and generation-degradation of hydrogen peroxide is well known. In recent years, the presence of a novel group of enzymes, mainly involved in the metabolism of oxygen free-radicals, has been shown in peroxisomes. In addition to hydrogen peroxide, peroxisomes can generate superoxide-radicals and nitric oxide, which are known cellular messengers with a variety of physiological roles in intra- and inter-cellular communication. Nitric oxide and hydrogen peroxide can permeate the peroxisomal membrane and superoxide radicals can be produced on the cytosolic side of the membrane. The signal moleculegenerating capacity of peroxisomes can have important implications for cellular metabolism in plants, particularly under biotic and abiotic stress.