Timing of the Auxin Response in Etiolated Pea Stem Sections 1
AUTOR(ES)
Barkley, Grant M.
RESUMO
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.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=396370Documentos Relacionados
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