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Ultrastructure, glutathione and low molecular weight proteins of Penicillium brevicompactum in response to cobalt

100%

Farrag R. M.

Polish Journal of Microbiology

2009

tom 58

nr 4

327-338

Penicillium brevicompactum highly tolerated cobalt concentrations of 50, 200, 800 and 1000 ppm both through cell wall and intracellular sequestration - immobilization of the metal on/within the cell wall, cell wall thickness, presence of electron-dense deposits inside vacuoles (thiol peptides sequestering cobalt) and in the cytoplasm (cobalt), and presence of matrixed electron-dense deposits, only at 800 and 1000 ppm, were observed. Increased vacuole formation and plasmolysis were also observed. Fraction number 9 of the cell free extract showed maximum cobalt uptake for all the investigated cobalt concentrations. In this fraction, glutathione was only induced at 500, 800 and 1000 ppm. Maximum glutathione concentration supported maximum cobalt uptake at 800 ppm. Low molecular weight protein profiles of fraction number 9 revealed that the presence of cobalt induced the appearance of new proteins that were not detected in the same fraction of the control. These low molecular weight peptides (12-5 KDa) suggest the production of Co-metallothioneins. This is the first report of cobalt-induced glutathione by P. brevicompactum and suggests the possible production of phytochelatins.

Observations on oocyst development of Eimeria stiedai in rabbits

100%

Ball S. J., Pittilo M. R., Snow K. R.

Acta Parasitologica

2014

tom 59

nr 3

The formation of the oocyst wall was examined in Eimeria stiedai in the bile duct epithelium of the rabbit and was found to follow the general eimerian pattern. However from the beginning of the formation of the outer layer of the oocyst wall the parasite was surrounded by a rarely reported veil membrane. Cell damage of the bile ducts at the gamogony stage of parasite development is depicted.

Ograniczanie wyników

1 Acta Parasitologica

1 Polish Journal of Microbiology

1 Ball S. J.

1 Farrag R. M.

1 Pittilo M. R.

1 Snow K. R.

1 2014

1 2009

Wyniki wyszukiwania

Ultrastructure, glutathione and low molecular weight proteins of Penicillium brevicompactum in response to cobalt

Observations on oocyst development of Eimeria stiedai in rabbits