Comparison of the appearance and development of lateral roots in the flax and maize seedlings has shown the way of root branching in the flax, as distinct from that in most plants. Some primordia in the flax main root did not develop immediately into lateral roots, but remained quiescent, which determines different reactions of the maize and flax root systems to experimental influences. Decapitation of the main root in the maize did not leads to a significant increase in the number of lateral roots, while in the flax, their number noticeably increased due to the development of previously quiescent primordia into lateral roots. The treatment with synthetic auxin did not induce the formation of additional primordia and lateral roots in the maize roots. In the flax, the number of primordia increased significantly and that of lateral roots increased to a somewhat lesser extent. Apparently, the development of a primordium into a lateral root proceeds in two stages and they have different regulation.
Russian Journal of Developmental Biology – Springer Journals
Published: Oct 7, 2004
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