Far-Red Reversal of Red Light Effect during Long-Night Induction of Potato (Solanum tuberosum L.) Tuberization |
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| Authors: | Batutis E J Ewing E E |
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| Affiliation: | Department of Vegetable Crops, Cornell University, Ithaca, New York 14853. |
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| Abstract: | The hypothesis that phytochrome is involved in the regulation of potato (Solanum tuberosum L.) tuberization was tested. When 5 minutes of red light were given in the middle of the 16-hour dark period to which whole plants were exposed daily for 14 days before making cuttings, the percentage of tuberization on cuttings decreased. The effect of red light was significantly reversed by 2 minutes of far-red light given immediately after the red in each of two separate experiments. This supports the hypothesis that phytochrome is at least indirectly involved. |
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