Yıl: 2005 Cilt: 29 Sayı: 1 Sayfa Aralığı: 15 - 21 Metin Dili: İngilizce

Effects of mercury and chromium on peroxidase and IAA oxidase enzymes in the seedlings of Phaseolus vulgaris

Öz:
Phaseolus seedlings (Phaseolus vulgaris L.) in light conditions were treated with 2 different concentrations of 2 heavy metals, mercury (0.05 mM and 0.4 mM) and chromium (0.5 and 1.0 mM). Mercury was given in the form of $HgCl_2$ and chromium was given in the form of $K_2Cr_20_7$. Peroxidase activity was measured with 4 different hydrogen donors (ferulic acid, caffeic acid, pyrocatechol and pyrogallol). Both mercury and chromium inhibited root and hypocotyl length. The inhibition was about 50%-80%, depending on the concentration of the heavy metal. Peroxidase and IAA oxidase activities showed a clear inverse relation with growth. Seedlings treated with a lower concentration of mercury had similar activities to those treated with higher concentrations of chromium. The role of peroxidase and IAA oxidase activities in defense mechanisms in response to heavy metal toxicity is discussed.
Anahtar Kelime: enzyme activity Phaseolus vulgaris toxicity IAA oxidase defence mechanisms mercury seedling growth peroxidase heavy metals chromium

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APA PARMAR N, Chanda S (2005). Effects of mercury and chromium on peroxidase and IAA oxidase enzymes in the seedlings of Phaseolus vulgaris. , 15 - 21.
Chicago PARMAR Nayna G.,Chanda Sumitra V. Effects of mercury and chromium on peroxidase and IAA oxidase enzymes in the seedlings of Phaseolus vulgaris. (2005): 15 - 21.
MLA PARMAR Nayna G.,Chanda Sumitra V. Effects of mercury and chromium on peroxidase and IAA oxidase enzymes in the seedlings of Phaseolus vulgaris. , 2005, ss.15 - 21.
AMA PARMAR N,Chanda S Effects of mercury and chromium on peroxidase and IAA oxidase enzymes in the seedlings of Phaseolus vulgaris. . 2005; 15 - 21.
Vancouver PARMAR N,Chanda S Effects of mercury and chromium on peroxidase and IAA oxidase enzymes in the seedlings of Phaseolus vulgaris. . 2005; 15 - 21.
IEEE PARMAR N,Chanda S "Effects of mercury and chromium on peroxidase and IAA oxidase enzymes in the seedlings of Phaseolus vulgaris." , ss.15 - 21, 2005.
ISNAD PARMAR, Nayna G. - Chanda, Sumitra V.. "Effects of mercury and chromium on peroxidase and IAA oxidase enzymes in the seedlings of Phaseolus vulgaris". (2005), 15-21.
APA PARMAR N, Chanda S (2005). Effects of mercury and chromium on peroxidase and IAA oxidase enzymes in the seedlings of Phaseolus vulgaris. Turkish Journal of Biology, 29(1), 15 - 21.
Chicago PARMAR Nayna G.,Chanda Sumitra V. Effects of mercury and chromium on peroxidase and IAA oxidase enzymes in the seedlings of Phaseolus vulgaris. Turkish Journal of Biology 29, no.1 (2005): 15 - 21.
MLA PARMAR Nayna G.,Chanda Sumitra V. Effects of mercury and chromium on peroxidase and IAA oxidase enzymes in the seedlings of Phaseolus vulgaris. Turkish Journal of Biology, vol.29, no.1, 2005, ss.15 - 21.
AMA PARMAR N,Chanda S Effects of mercury and chromium on peroxidase and IAA oxidase enzymes in the seedlings of Phaseolus vulgaris. Turkish Journal of Biology. 2005; 29(1): 15 - 21.
Vancouver PARMAR N,Chanda S Effects of mercury and chromium on peroxidase and IAA oxidase enzymes in the seedlings of Phaseolus vulgaris. Turkish Journal of Biology. 2005; 29(1): 15 - 21.
IEEE PARMAR N,Chanda S "Effects of mercury and chromium on peroxidase and IAA oxidase enzymes in the seedlings of Phaseolus vulgaris." Turkish Journal of Biology, 29, ss.15 - 21, 2005.
ISNAD PARMAR, Nayna G. - Chanda, Sumitra V.. "Effects of mercury and chromium on peroxidase and IAA oxidase enzymes in the seedlings of Phaseolus vulgaris". Turkish Journal of Biology 29/1 (2005), 15-21.