Lekacz Halina, Karcz Waldemar
Faculty of Biology, Department of Plant Physiology, University of Silesia, Katowice, Poland.
Cell Mol Biol Lett. 2006;11(3):376-83. doi: 10.2478/s11658-006-0031-5.
Indole-3-acetic acid (IAA) and 4-chloroindole-3-acetic acid (4-Cl-IAA) were tested at different concentrations and times for their capacity to change the redox activity and medium pH of maize root segments. The dose-response surfaces (dose-response curves as a function of time) plotted for redox activity and changes in medium pH (expressed as DeltapH) had a similar shape for both auxins, but differed significantly at the optimal concentrations. With 4-Cl-IAA, the maximal values of redox activity and medium pH changes were observed at 10(-10) M, which was a 100-fold lower concentration than with IAA. Correlations were observed between redox activity and medium pH changes at the optimal concentrations of both IAA and 4-Cl-IAA. The results are discussed herein, taking into account both the concentration of the auxins and the effects produced by them.
研究了吲哚 - 3 - 乙酸(IAA)和4 - 氯吲哚 - 3 - 乙酸(4 - Cl - IAA)在不同浓度和时间下改变玉米根段氧化还原活性和培养基pH值的能力。绘制的氧化还原活性和培养基pH值变化(以ΔpH表示)的剂量 - 反应表面(作为时间函数的剂量 - 反应曲线)对于两种生长素具有相似的形状,但在最佳浓度下有显著差异。对于4 - Cl - IAA,在10^(-10) M时观察到氧化还原活性和培养基pH值变化的最大值,该浓度比IAA低100倍。在IAA和4 - Cl - IAA的最佳浓度下,观察到氧化还原活性与培养基pH值变化之间的相关性。本文结合生长素的浓度及其产生的效应讨论了这些结果。