Abstract:
:Trypsin digestion of photosynthetic membranes isolated from spinach (Spinacia oleracea L.) leaves eliminates the cation stimulation of chlorophyll fluorescence. High concentrations of cations protect the fluorescence yield against trypsin digestion, and the cation specificity for this protection closely resembles that required for the stimulation of fluorescence by cations. Trypsin digestion reverses cation-induced thylakoid stacking, and the time course of this effect seems to parallel that of the reversal of cation fluorescence. High concentrations of cations protect thylakoid stacking and cation-stimulated fluorescence alike. The cation stimulation of photosytem II photochemistry remains intact after trypsinization has reversed both cation-induced thylakoid stacking and fluorescence yield. It is concluded that cation-stimulated fluorescence yield, and not the cation stimulation of photosystem II photochemistry, is associated with thylakoid membrane stacking.
journal_name
Plant Physioljournal_title
Plant physiologyauthors
Jennings RC,Forti G,Gerola PD,Garlaschi FMdoi
10.1104/pp.62.6.879subject
Has Abstractpub_date
1978-12-01 00:00:00pages
879-84issue
6eissn
0032-0889issn
1532-2548journal_volume
62pub_type
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