Incorporation of 5‐Aminolevulinic Acid in the Chlorophyll‐Protein Complexes of the Moss Ceratodon purpureus

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Abstract
After one month of cultivation in the dark in inorganic medium the chloroplasts of protonemata of Ceratodon purpureus have larger grana than chloroplasts from light-grown cultures. Incubation of dark-grown material with ALA increases the chlorophyll content and chlorophyll a/b ratio. On polyacrylamide-gel electrophoresis, a préferential labelling of chlorophyll-protein complex I is obtained after treatment with (3H) ALA in darkness. In contrast, in light, much higher activity is found in chlorophyll-protein complex II. The free pigment zone is highly labelled in both environments.