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Plant Physiology 56:335-336 (1975)
© 1975 American Society of Plant Biologists

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Articles

Carbon Dioxide Requirements for Phytochrome Action in Photoperiodism and Seed Germination 1

Pawan K. Bassi, E. Bruce Tregunna and Aditya N. Purohit

a Department of Botany, University of British Columbia, Vancouver, V6T 1W5 British Columbia, Canada

The effect of interrupting darkness with red light in the presence or absence of 0.03% CO2 was studied in relation to flowering of Xanthium pennsylvanicum and germination of light-sensitive lettuce seeds. The results indicate that CO2 is essential for red light to be effective in either process.

1 This work was supported by the National Research Council of Canada and the Killam Foundation.






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Copyright © 1975 by the American Society of Plant Biologists