Abstract
After sowing, mustard (Sinapis alba L.) seedlings were grown for 48 h in white light (25°C). These fully de-etiolated, green seedlings were used as experimental material between 48 and 72 (84) h after sowing. The question researched was to what extent control by light of hypocotyl elongation is due to phytochrome in these seedlings. It was found that the light effect on hypocotyl growth is very probably exerted through phytochrome only. In particular, we found no indication for the involvement of a specific blue light photoreceptor pigment.
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Abbreviations
- HIR:
-
high irradiance reaction
- Pfr :
-
far-red absorbing, physiologically active form of phytochrome
- Pr :
-
red absorbing, physiologically inactive form of phytochrome
- Pot :
-
total phytochrome, i.e. [Pr]+[Pfr]
- ρλ:
-
[Pfr]λ/[Ptot]
- red:
-
red light
- fr:
-
far-red light
- wl:
-
white light
- bl:
-
blue light
- di:
-
dichromatic irradiation
- l:
-
hypocotyl length
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Wildermann, A., Drumm, H., Schäfer, E. et al. Control by light of hypocotyl growth in de-etiolated mustard seedlings. Planta 141, 211–216 (1978). https://doi.org/10.1007/BF00387891
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DOI: https://doi.org/10.1007/BF00387891