Navigation überspringen
Universitätsbibliothek Heidelberg
Status: Bibliographieeintrag

Verfügbarkeit
Standort: ---
Exemplare: ---
heiBIB
 Online-Ressource
Verfasst von:Roeder, Susanna [VerfasserIn]   i
 Wirtz, Markus [VerfasserIn]   i
 Hell, Rüdiger [VerfasserIn]   i
Titel:SAM levels, gene expression of SAM synthetase, methionine synthase and ACC oxidase, and ethylene emission from N. suaveolens flowers
Verf.angabe:Susanna Roeder, Katharina Dreschler, Markus Wirtz, Simona M. Cristescu, Frans J. M. van Harren, Rüdiger Hell, Birgit Piechulla
Umfang:12 S.
Fussnoten:Gesehen am 17.05.2017
Titel Quelle:Enthalten in: Plant molecular biology
Jahr Quelle:2009
Band/Heft Quelle:70(2009), 5, S. 535-546
ISSN Quelle:1573-5028
Abstract:S′adenosyl-l-methionine (SAM) is a ubiquitous methyl donor and a precursor in the biosynthesis of ethylene, polyamines, biotin, and nicotianamine in plants. Only limited information is available regarding its synthesis (SAM cycle) and its concentrations in plant tissues. The SAM concentrations in flowers of Nicotiana suaveolens were determined during day/night cycles and found to fluctuate rhythmically between 10 and 50 nmol g−1 fresh weight. Troughs of SAM levels were measured in the evening and night, which corresponds to the time when the major floral scent compound, methyl benzoate, is synthesized by a SAM dependent methyltransferase (NsBSMT) and when this enzyme possesses its highest activity. The SAM synthetase (NsSAMS1) and methionine synthase (NsMS1) are enzymes, among others, which are involved in the synthesis and regeneration of SAM. Respective genes were isolated from a N. suaveolens petal cDNA library. Transcript accumulation patterns of both SAM regeneratingenzymes matched perfectly those of the bifunctional NsBSMT; maximum mRNA accumulations of NsMS1 and NsSAMS1 were attained in the evening. Ethylene, which is synthesized from SAM, reached only low levels of 1-2 ppbv in N. suaveolens flowers. It is emitted in a burst at the end of the life span of the flowers, which correlates with the increased expression of the 1-aminocyclopropane-1-carboxylate oxidase (NsACO).
DOI:doi:10.1007/s11103-009-9490-1
URL:Bitte beachten Sie: Dies ist ein Bibliographieeintrag. Ein Volltextzugriff für Mitglieder der Universität besteht hier nur, falls für die entsprechende Zeitschrift/den entsprechenden Sammelband ein Abonnement besteht oder es sich um einen OpenAccess-Titel handelt.

Kostenfrei: Verlag: http://dx.doi.org/10.1007/s11103-009-9490-1
 Kostenfrei: Verlag: https://link.springer.com/article/10.1007/s11103-009-9490-1
 DOI: https://doi.org/10.1007/s11103-009-9490-1
Datenträger:Online-Ressource
Sprache:eng
K10plus-PPN:1558701478
Verknüpfungen:→ Zeitschrift

Permanenter Link auf diesen Titel (bookmarkfähig):  https://katalog.ub.uni-heidelberg.de/titel/68120412   QR-Code
zum Seitenanfang