Phytochrome is not involved in the red-light-enhancement of the stomatal blue-light-response in wheat seedlings |
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Authors: | Per Erik Karlsson |
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Institution: | Dept of Plant Physiology, Botanical Inst., Univ. of Göteborg, Carl Skottsbergs gata 22, S-413 19 Göteborg, Sweden. |
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Abstract: | The stomatal response to blue light (BL) in wheat seedlings ( Triticum aestivum L. cv. Starke II, Weibull) was enhanced by background red light (R). This enhancement was only slightly affected by the addition of background far-red light (FR). Under similar light treatments, the addition of FR induced a 43% transformation from the far-red-absorbing form towards the red-absorbing form of phytochrome from etiolated oat ( Avena sativa L. cv. Sol II), immobilized on phenyl-sepharose. Furthermore, the enhancement of the stomatal BL-response by 15 min R was not reversed by a subsequent irradiation with 5 min FR. It is concluded that the red-light-enhancement of the stomatal blue-light-response in wheat seedlings does not involve a change in the photostationary state of phytochrome. |
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Keywords: | Avena sativa blue light far-red light HIR oat phytochrome red light enhancement stomata Triticum aestivum wheat |
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