Induction of nodule-like structures on roots of rape by treatment with growth regulators, and morphological changes in the root system associated with their formation.
Abstract
Rape cv. Eurol seedlings were treated with a range of concentrations of 2,4-D, IAA or NAA for periods between 30 min and 48 h in the absence or presence of N. Seedlings were also exposed throughout the experiment to the higher rate of 2,4-D without N, or to a low rate of IAA with N or a high rate without N. Observations after 1 month showed that 2,4-D induced nodule-like structures at low concentrations, while IAA and NAA were only effective at high concentrations. With all compounds results were generally better with N. Induction occurred after 48 h treatment with 2,4-D, while permanent exposure to IAA was required. These structures were associated with significant modification of the root system but were not comparable with N-fixing nodules of leguminous species. Rape cv. Eurol seedlings were treated with a range of concentrations of 2,4-D, IAA or NAA for periods between 30 min and 48 h in the absence or presence of N. Seedlings were also exposed throughout the experiment to the higher rate of 2,4-D without N, or to a low rate of IAA with N or a high rate without N. Observations after 1 month showed that 2,4-D induced nodule-like structures at low concentrations, while IAA and NAA were only effective at high concentrations. With all compounds results were generally better with N. Induction occurred after 48 h treatment with 2,4-D, while permanent exposure to IAA was required. These structures were associated with significant modification of the root system but were not comparable with N-fixing nodules of leguminous species.
Rape cv. Eurol seedlings were treated with a range of concentrations of 2,4-D, IAA or NAA for periods between 30 min and 48 h in the absence or presence of N. Seedlings were also exposed throughout the experiment to the higher rate of 2,4-D without N, or to a low rate of IAA with N or a high rate without N. Observations after 1 month showed that 2,4-D induced nodule-like structures at low concentrations, while IAA and NAA were only effective at high concentrations. With all compounds results were generally better with N. Induction occurred after 48 h treatment with 2,4-D, while permanent exposure to IAA was required. These structures were associated with significant modification of the root system but were not comparable with N-fixing nodules of leguminous species.
Palabras clave:
Aia.
Auxinas.
growth regulators
morphology
Nasas.
plant growth regulators
Rape.
root systems
roots
Growth regulators
Morphology
Morphology
Plant regulators
Aia.
Auxinas.
growth regulators
morphology
Nasas.
plant growth regulators
Rape.
root systems
roots
Growth regulators
Morphology
Morphology
Plant regulators
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