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. 1977 Dec;60(6):916–922. doi: 10.1104/pp.60.6.916

Histochemical Evidence for the Occurrence of Oligomycin-sensitive Plasmalemma ATPase in Corn Roots 1

Carl P Malone a, John J Burke a, John B Hanson a
PMCID: PMC542745  PMID: 16660212

Abstract

A cytochemical study has been made on the localization of ATPase activity in corn (Zea mays L.) roots. Light microscopy shows washing for 4 hours to increase the general ATPase activity in the peripheral layers of the root cortex; oligomycin and N,N-dicyclohexylcarbodiimide inhibit this activity, oligomycin being more effective. Ultrastructural studies of ATPase location show oligomycin treatment to inhibit both mitochondrial and plasmalemma ATPase, but only in the epidermis and outer cortex. Studies with lipid-soluble dyes indicate that oligomycin might not penetrate very deeply into root tissue in the time span of these experiments. It is suggested that the strong inhibition of ion absorption by oligomycin without a corresponding decline in ATP content is probably due to inhibition of ion absorption in the peripheral cell layers, thus limiting the supply of ion for symplastic transport to the uninhibited tissues.

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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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