Photosystem II activity and pigment-protein complexes in flashed bean leaves

R. G. Hiller*, Dori Pilger, Sandra Genge

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    20 Citations (Scopus)


    Bean leaves exposed to cycles of 2 min light-118 min dark, (1) can photoreduce cytochrome f; (2) have cytochrome b-559HP; (3) have a DCMU (3-[3′,4′-dichlorophenyl]-1,1-dimethylurea)-sensitive Hill reaction. Detergent extracts of the plastids show only pigment-protein complex I. Shortening the dark period leads to formation of chl b (chlorophyll b) and the appearance of pigment-protein complex II with no increase in the rate of Hill reaction. As the proteins of detergent solubilised etioplasts and of plastids from leaves flashed for 60 h are very similar, it is concluded that pigment is added on to the pre-existing proteins of the etioplast. The presence of pigment-protein complex II reflects the requirement for chl b to stabilise it during extraction rather than the activity of PS II (Photosystem II).

    Original languageEnglish
    Pages (from-to)81-88
    Number of pages8
    JournalPlant Science Letters
    Issue number3
    Publication statusPublished - 1973


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