Abstract
The changes in soluble proteins associated with adventitious root formation in hypocotyls of radiata pine (Pinus radiata D. Don) were studied using one- and two-dimensional polyacrylamide gel electrophoresis. Protein content decreased during the first day after root excision, and kept decreasing till the end of the time course under non-rooting conditions, i.e., on medium without growth regulators, with indole-3-butyric acid (IBA) + kinetin, or with kinetic alone. During adventitious root initiation in response to IBA, however, the protein content began to increase from day 1 to its maximum at day 7, coinciding with the early stage of root initiation. A comparative analysis of protein changes by two-dimensional polyacrylamide gel electrophoresis showed 16 proteins that were probably associated with root initiation and development.
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