Abstract: The effects of the derivatives of sulfur dioxide(sodium bisulfite) on the cell division and growth of V. faba seedlings were investigated. The results showed that bisulfite inhibited seedling growth and both length of buds and roots had negative relation to the concentrations(in the range of 0~30mmol/L). The mitotic index decreased significantly in root tips when seedlings exposed to sodium bisulfite for 12~36 h. The number of prophase cells was decreased but the number of the cells at interphase and anaphase and telophase increased after exposure 12~36 h. The results indicate sodium bisulfite prevent the cells from going split and delay the mitosis process, the effects may include delays in passing through S into G2, a protracted G2 and an effect on the speed of passage through mitosis itself. That may be the cause for the growth inhibition and the decrease in mitotic index.

Key words: sodium bisulfite, Vicia faba, growth inhibition, mitotic index, cell cycle