Agricultural and Biological Sciences
8 years ago

White light boosts rose seed germination, red light key factor

Journal of the American Society for Horticultural Science
Light and Phytochrome Involvement in Rosa multiflora Seed Germination
Yoshiko Yambe, Kiyotoshi Takeno, Takashi Saitō

Paper Summary

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Multiflora rose seeds germinate better in light than in darkness. Red light helps the most, while far-red light doesn't help. Just 1 minute of red light exposure boosts germination, with 2 minutes being the maximum benefit. Far-red light can undo the red light's effect. This shows that rose seeds need light to sprout, and a plant pigment called phytochrome is likely responsible.