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. 1975 Feb;55(2):303–307. doi: 10.1104/pp.55.2.303

Sulfate Transport in Cultured Tobacco Cells

Ivan K Smith a
PMCID: PMC541604  PMID: 16659071

Abstract

Sulfate transport by tobacco (Nicotiana tabacum L. var. Xanthi) cells cultured on either l-cysteine or sulfate as a sole sulfur source was measured. The transport rate on either sulfur source was low during pre-exponential growth, increased during exponential growth, and was maximal in late exponential cells. The initial increase in transport rate was correlated with a decline in the intracellular sulfate, but was not correlated with the amino acid content of the cells which remained relatively constant before the depletion of the endogenous sulfate pool. The previously reported inhibition of sulfate transport by l-cysteine was shown to be caused by an elevation in intracellular sulfate resulting from the degradation of cysteine to sulfate. It is proposed that the intracellular sulfate pool is the major factor regulating the entry of sulfate into tobacco cells.

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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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