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.
journal_name
Plant Physioljournal_title
Plant physiologyauthors
Vaughn KC,Outlaw WHdoi
10.1104/pp.71.2.420subject
Has Abstractpub_date
1983-02-01 00:00:00pages
420-4issue
2eissn
0032-0889issn
1532-2548journal_volume
71pub_type
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