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. 1976 May;57(5):817–819. doi: 10.1104/pp.57.5.817

Additional Evidence for Separable Responses to Auxin in Soybean Hypocotyl 1

Larry N Vanderhoef a,2, Catherine A Stahl a, Cindi A Williams a,3, Kathleen A Brinkmann a, John C Greenfield b,4
PMCID: PMC542124  PMID: 16659576

Abstract

Additional evidence for two separable responses to auxin is presented. The average of 24 control experiments indicated lag times of 12.4 and 35.4 min, and maximum rates of 0.57 and 0.54 mm hr−1, for the first and second response, respectively. The auxin analog 4-azido-2-chlorophenoxyacetic acid increased the lag time of the second response (but not the first), resulting in the temporal separation of the two responses. Plots of elongation rates against time, taken from the literature, allowed the characterization of the two responses in monocotyls and dicotyls. Study of published rate-time elongation curves showed that the maximum rate of the first response is frequently greater than the maximum rate of the second response; however, the maximum rate of the second response has not yet been shown to exceed the maximum rate of the first response.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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