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Plant Physiology 95:711-715 (1991)
© 1991 American Society of Plant Biologists

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Molecular Biology and Gene Regulation

Induction of Specific mRNAs in Cultured Soybean Cells during Cytokinin or Auxin Starvation 1

Dring N. Crowell and Richard M. Amasino

Department of Biochemistry, College of Agricultural and Life Sciences, University of Wisconsin-Madison, Madison, Wisconsin 53706

We report the isolation of five cDNA clones whose corresponding mRNAs accumulate in cultured soybean cells (Glycine max cv Mandarin) during cytokinin or auxin starvation. The levels of three of these mRNAs decrease rapidly after addition of 5 micromolar zeatin to cytokinin-starved cells or after addition of 10 micromolar {alpha}-naphthaleneacetic acid to auxin-starved cells. These mRNAs also exhibit various patterns of accumulation in the tissues of intact soybean plants. Partial nucleotide sequence analysis demonstrates that one of the cDNAs in the collection, called SAM46, is 46% identical at the amino acid level to the iron superoxide dismutase gene of Escherichia coli. Expression of this cDNA in Escherichia coli cells results in detectable iron superoxide dismutase activity, confirming the identity of the cDNA.

1 This work was supported by grant DCB-8957036 from the National Science Foundation and by the College of Agricultural and Life Sciences, University of Wisconsin-Madison. R.M.A. is a James D. and Dorothy Shaw Scholar.




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Copyright © 1991 by the American Society of Plant Biologists