Timing of the Auxin Response in Etiolated Pea Stem Sections
Year: 1970
Type: article
Abstract: The short term growth response of etiolated pea stem segments (Pisum sativum L., var. Alaska) was investigated with the use of a high resolution growth-recording device. The immediate effect of treatment with indole-3-acetic acid is an inhibition of growth. This inhibition lasts about 10 minutes, and then the rate of elongation rises abruptly to a new steady rate about 4 times the rate of elongation before auxin treatment. This rapid steady rate of elongation, however, continues for only about 25 minutes before declining suddenly to a lower steady rate of growth about 2 times the rate of elongation before the addition of auxin. Pretreatment of the segments with cycloheximide or actinomycin strongly inhibits both phases of auxin-promoted elongation without altering the length of the latent period in response to the hormone.
Source: PLANT PHYSIOLOGY
DOI: 10.1104/pp.45.2.143
Authors: Grant M. Barkley, Michael L. Evans
Institutions: Western Michigan University, Kalamazoo College
Language: English
Subfield: Plant Science
Domain: Life Sciences
Open Access status: green
OpenAlex ID: W2002174910