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. 1975 Jan;72(1):69–72. doi: 10.1073/pnas.72.1.69

Enhancement of soybean RNA polymerase I by auxin.

T J Guilfoyle, C Y Lin, Y M Chen, R T Nagao, J L Key
PMCID: PMC432242  PMID: 1054515

Abstract

When etiolated soybean seedlings are treated with the synthetic auxin, 2,4-dichlorophenoxy-acetic acid, cells of the mature hypocotyl become swollen and proliferate abnormally. This abnormal growth induced by auxin coincides with a 5- to 8-fold increase in the alpha-amanitin-insensitive RNA polymerase associated with isolated chromatin or nuclei. The alpha-amanitin-sensitive RNA polymerase activity of the auxin-treated hypocotyl was similar to that of control tissue. The increase in RNA polymerase I activity of chromatin and nuclei was maintained after solubilization and fractionation on DEAE-cellulose. Auxin thus appears to enhance RNA synthetic activity (i.e., ribosomal RNA) in mature soybean tissue by altering RNA polymerase I directly rather than by altering RNA polymerase I directly rather than by altering the chromatin template.

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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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