Regulation of phytochrome A mRNA abundance in parsley seedlings and cell-suspension cultures |
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Authors: | Christoph Poppe Bruno Ehmann Hanns Frohnmeyer Masaki Furuya Eberhard Schäfer |
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Institution: | (1) Institut für Biologie II, Universität Freiburg, Schänzlestrasse 1, 79104 Freiburg, Germany |
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Abstract: | A cDNA clone encoding the apoprotein of a parsley phytochrome was isolated and classified as parsley PHYA phytochrome, on the basis of a sequence homology comparison with all available phytochrome sequences. Red light pulses led to a phytochrome-dependent down-regulation of PHYA mRNA abundance in etiolated parsley seedlings to a level of 10–20% compared with the dark control. The PHYA mRNA abundance in a parsley cell suspension culture was also down-regulated by light pulses. Transient expression assays in parsley protoplasts showed light regulation of a chimeric pea PHYA promoter uidA-gene construct. |
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Keywords: | phytochrome parsley light regulation transient gene expression |
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