Low Molecular Weight Thiols and Chromosomal Aberrations in Picea omorika upon Exposure to Two Concentrations of H2S : 2nd Slovenian Symposium on Plant Physiology with international Participation, Gozd Martuljek. Slovenia, September, 30 to Oktober 2nd, 1998

1999

S. 167-170

1 Tabb., 11 Lit.

Unselbständiges Werk

200059374

Three years old spruce trees (Picea aomorika) were exposed to 100 and 225 nl l-Ü H2S for three weeks. Contents of glutathione and cysteine in needles and fine roots as well as the number of chromosomal aberrations and the mitotic index in the root tips were determined. H2 S exposure resulted in a substantial increase of the cyst(e)ine (up to 7-fold) and total glutathione content (up to 3-fold) of the needles, whereas in fine roots there was solely and increase in the glutathione content (2-fold) at 225 nl l-Ü. Glutathione was predominantly present in its reduced form, also upon H2S exposure. The number of chromosomal aberrations in the root tips increased significantly upon H2S, it was 2-fold higher than that in control roots. However, the mitotic index was not affected by H2S.