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doi: 10.1007/BF01947483pmid: N/A
a) Some photoreactions influencing the early stages of the development of mustard seedlings (Brassica alba Boiss.=Sinapis alba L.) were studied, using monochromatic radiation (400–800 mμ) from a spectrograph. b) Anthocyanin formation is light-dependent in these seedlings and is controlled by two photoreactions. One of these photoreactions is governed by the well-known red-far-red-pigment system and is practically saturated after a very shor time of irradiation (low-energy reaction). The other photoreaction for anthocyanin formation is a high-energy reaction. Its action spectrum was determined. There was an action throughout the visible spectrum with peaks in the far-red region (about 710 mμ) and in the blue region. c) The action spectrum for the influence of radiation between 400 and 800 mμ was also determined for the lengthening of the hypocotyl. It is practically identical with the action spectrum for the high-energy reaction of anthocyanin formation. This photoreaction which essentially controls the lengthening, is also a high-energy reaction. These facts and results of additional experiments with colored fluorescent tubes indicate that the same pigment system absorbs the energy which controls formation of anthocyanin and lengthening of the hypocotyl. A significant effect of the reversible red-far-red-pigment system on the lengthening of the hypocotyl could not be obtained. d) The region of action indicates that the pigment that is involved in the high-energy reactions might be a copper-flavoprotein.
doi: 10.1007/BF01947484pmid: N/A
1. Die centrospermen-spezifischen Stickstoff-Anthocyane (Betanine, Flavocyanine) der Chenopodiaceen, Amarantaceen, Nyctaginaceen, Phytolaccaceen, Aizoaceen, Portulacaceen und Cactaceen verhalten sich bei Ionophorese in verschiedenen Puffergemischen wie das Betanin der Roten Rübe. 2. Bei Anwendung der Hochspannungs-Ionophorese erfolgt häufig eine Auftrennung der Betaninfraktion in mehrere Komponenten, deren Charakteristika beschrieben werden. Ähnliches gilt für Flavocyaninfraktionen. 3. Es werden Listen über die Blütenpigmentierung von Cactaceen und Aizoaceen mitgeteilt und in taxonomischer Hinsicht gedeutet. 4. Die physiologische Rolle der N-Anthocyane wurde im Rahmen des allgemeinen Anthocyanstoffwechsels diskutiert. 5. Als Copigmente wurden Flavonolglycoside nachgewiesen. Bei den Cactaceen dominieren Quercetin-3-glycoside, bei den Aizoaceen Kaempferol-3-glycoside. Im Cactaceen-GenusNotocactus tritt ein Quercetin-7-glycosid auf.
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