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polystichum/photophobia

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Effects of nutrients and light pretreatment on phytochrome-mediated fern-spore germination.

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Spores of the ferns, Dryopteris filix-mas, D. paleacea and Polystichum minutum, sown on plain agar in quartz-distilled water, required several hours of red light in order to germinate. When, however, water agar was replaced by agar made up with a mineral nutrition medium, a single pulse of red light
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