biologia plantarum

Biologia plantarum 30:427, 1988 | DOI: 10.1007/BF02890512

Relationships between nodulation and auxin level in pea roots

S. A. El-Desouky¹, V. Psota², J. Šebánek¹, G. N. Choi¹

¹ Department of Botany and Plant Breeding, University of Agriculture, Brno, Czechoslovakia

² Institute of Systematic and Ecological Biology, Czechoslovak Academy of Sciences, Brno, Czechoslovakia

In the roots of 4-day-old pea plants germinated in unsterile soil from Rhizobium-inoculated seeds, a higher level of native IAA was determined than in roots of pea plants germinated in sterile soil from superficially sterilized seeds. The IAA level in plants grown from inoculated seeds increased markedly up to the age of 6 days of the plant, while in plants growing under sterile conditions it did not significantly change during the same period. Between the 6th and 10th days of the age of the plant, a decline in the IAA level was observed in roots of plante growing from inoculated seeds. It was not until after 10 days of age of the plant that the level of IAA in nodulated roots again increased.

Received: February 29, 1988; Accepted: May 17, 1988; Published: November 1, 1988  Show citation