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. 1983 Feb;71(2):420–424. doi: 10.1104/pp.71.2.420

Cytochemical and Cytofluorometric Evidence for Guard Cell Photosystems 1

Kevin C Vaughn 1,2, William H Outlaw Jr 1,2
PMCID: PMC1066047  PMID: 16662840

Abstract

Evidence for photosynthetic linear electron transport in guard cells was obtained with two sensitive methods of high spacial resolution. Light-dependent diaminobenzidine oxidation (an indicator of PSI) and DCMU-sensitive, light-dependent thiocarbamyl nitroblue tetrazolium reduction (an indicator of PSII) were observed in guard cell plastids of Hordeum vulgare L. cv Himalaya using electron microscopic cytochemical procedures. DCMU-sensitive Chl a fluorescence induction (an indicator of PSII) was detected in individual guard cell pairs of Vicia faba L. cv Longpod using an ultramicrofluorometer. At least for these species, we conclude these results are proof for the presence of PSII in guard cell chloroplasts, which until now has been somewhat controversial.

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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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