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http://dx.doi.org/10.18419/opus-2277
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DC Element | Wert | Sprache |
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dc.contributor.author | Vallon, Ulrike | de |
dc.contributor.author | Graf, Josef A. | de |
dc.contributor.author | Kull, Ulrich | de |
dc.date.accessioned | 2014-03-17 | de |
dc.date.accessioned | 2016-03-31T07:54:33Z | - |
dc.date.available | 2014-03-17 | de |
dc.date.available | 2016-03-31T07:54:33Z | - |
dc.date.issued | 1989 | de |
dc.identifier.other | 403486971 | de |
dc.identifier.uri | http://nbn-resolving.de/urn:nbn:de:bsz:93-opus-90976 | de |
dc.identifier.uri | http://elib.uni-stuttgart.de/handle/11682/2294 | - |
dc.identifier.uri | http://dx.doi.org/10.18419/opus-2277 | - |
dc.description.abstract | The concentration of kinetin and kinetinriboside plays an essential role in the induction of amaranthin accumulation in cotyledons of Amaranthus tricolor during germination. The dose/effect ratio shows that kinetin induced 3- to 3.5-fold more amaranthin than kinetinriboside at the same molecular concentration. Various concentrations of exogenous Ca2+ did not influence the effects of kinetin on the betacyanin synthesis. However, when Ca2+ was applied together with kinetinriboside, the amaranthin production was stimulated. Time-course experiments show a lag phase of 16 h starting from the incubation with kinetin and a distinct increase of amaranthin thereafter. If the seedlings were treated simultaneously with kinetin and Ca2+, the increase of amaranthin started after 12 h. At 16 h of incubation in kinetin/Ca2+, the amount of amaranthin increased significantly compared to controls incubated with kinetin alone. If Ca2+ ions (16 h kinetin/Ca2+ incubation) were removed from the medium after 2 h, 4 h, and up to 14 h, the amaranthin content was enhanced compared to controls without Ca2+. The stimulating effect was highest in the presence of Ca2+ for 8 h. These data show that exogenous Ca2+ stimulated the amaranthin synthesis mainly during the first 12 h of incubation. The Ca2+ antagonists EGTA, chlorotetracycline, and CoCl2 reduced the amaranthin content up to 80%. The calmodulin antagonists chloropromazine and trifluoperazine inhibited the betacyanin accumulation up to 97% when applied at the beginning of the incubation. Neither Co2+ nor trifluoperazine after 12 h of preincubation in kinetin had inhibiting effects on the amaranthin production. Therefore, we presume that a specific period of competence is required for calmodulin-mediated Ca2+ effects on the accumulation of amaranthin induced by cytokinins in the seedlings of Amaranthus tricolor. | en |
dc.language.iso | en | de |
dc.rights | info:eu-repo/semantics/openAccess | de |
dc.subject.classification | Schwingungsspektrum , Cytokinine , Calcium | de |
dc.subject.ddc | 580 | de |
dc.title | Influence of calcium and calcium and calmodulin antagonists on the cytokinin-induced amaranthin accumulation in Amaranthus tricolor | en |
dc.type | article | de |
ubs.fakultaet | Fakultät Energie-, Verfahrens- und Biotechnik | de |
ubs.institut | Institut für Biomaterialien und biomolekulare Systeme | de |
ubs.opusid | 9097 | de |
ubs.publikation.source | Journal of plant growth regulation 8 (1989), S. 81-92. URL http://dx.doi.org./10.1007/BF02025276 | de |
ubs.publikation.typ | Zeitschriftenartikel | de |
Enthalten in den Sammlungen: | 04 Fakultät Energie-, Verfahrens- und Biotechnik |
Dateien zu dieser Ressource:
Datei | Beschreibung | Größe | Format | |
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kul104.pdf | 2,74 MB | Adobe PDF | Öffnen/Anzeigen |
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