Light-induced absorption changes in etiolated Coleoptiles

    Research output: Contribution to journalArticlepeer-review

    Abstract

    Blue (or green) light induced reversible and irreversible absorption changes in etiolated wheat (Triticum aestivum) coleoptiles. Immediately after a 10 s pulse of blue light, there was an absorbance increase at 440 nm and a decrease at 420 nm. The absorbance at 440 nm returned to the original level in a biphasic way with 1st-order rate constants of 0.05 s-1 and 0.006 s-1 at 25.degree. C. The change at 440 nm was partly, but not completely, inhibited by iodide. In the 500-600 nm region, complex changes occurred, indicating the participation of at least 2 different cytochromes, one of which was oxidized during a 10 s light pulse and the other oxidized more slowly during the following dark period.
    Original languageEnglish
    Pages (from-to)305-309
    JournalPhysiologia Plantarum
    Volume36
    Issue number4
    DOIs
    Publication statusPublished - 1976

    Subject classification (UKÄ)

    • Biological Sciences

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