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245	1	0	_aSelenium-induced ixidative stress in coffee cell suspension cultutres
490	0		_vfunctional Plant Biology, 34, p.449-456, 2007
520	3		_aSelenium (Se)is an essential element for humans and animals that is required for key antioxidant reactions, but can be toxic at high concentrations. We have investigated the effect of Se in the form of selenite on coffee cell suspension cultures over a 12-day period. The antioxidant defence systems were induced in coffee cells grown in the presence of 0.05 and 0.5mM sodium selenite (Na2SeO3). Lipid peroxidation and alterations in antioxidant enzymes were the main responses observed, including a severe reduction in ascorbate peroxidase activity, even at 0.05mM sodium selenite. Ten superoxide dismutase (SOD)isoenzymes were detected and the two major Mn-SOD isoenzymes (bands V and VI)responded more to 0.05mM selenite. SOD band V exhibited a general decrease in activity after 12 h of treatment with 0.05mM selenite, whereas band VI exhibited the opposite behavior and increased in activity. An extra isoenzyme of glutathione reductase (GR)was induced in the presence of selenite, which confirmed our previous results obtained with Cd and Ni indicating that this GR isoenzyme may have the potential to be a marker for oxidative stress in coffee.
650	1	4	_aCOFFEA ARABICA
650	1	4	_aGLUTATHIONE REDUCTASE
650	1	4	_aOXIDATIVE STRESS
650	1	4	_aSELENIUM
650	1	4	_aSUPEROXIDE DISMUTASE
700	1	2	_aGomes-Junior, R. A.
700	1	2	_aGratao, P.L
700	1	2	_aGaziola, S.A
700	1	2	_aMazzafera, P.
700	1	2	_aLea, P.J.
700	1	2	_aAzavedo, R.A.
856	4	0	_uhttps://drive.google.com/file/d/1E4cJ_YNV4uYpmDX9gi3JUMna652E2aTr/view?usp=drivesdk _zPara ver el documento ingresa a Google con tu cuenta: @cicy.edu.mx
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