Acetylcholine in plants: presence, metabolism and mechanism of action

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dc.contributor.author Tretyn, Andrzej
dc.contributor.author Kendrick, Richard E.
dc.date.accessioned 2015-08-03T06:32:01Z
dc.date.available 2015-08-03T06:32:01Z
dc.date.issued 1991-01-01
dc.identifier.citation Botanical Review vol. 57 (1), 1991, pp. 33-73
dc.identifier.issn 0006-8101
dc.identifier.uri http://repozytorium.umk.pl/handle/item/2882
dc.description.abstract Acetylcholine (ACh) has been detected in representatives of many taxonomic groups throughout the plant kingdom. The site of its synthesis in plants is probably young leaves. In some plant species choline acetyltransferase (CHAT) activity has been found. This enzyme showing properties similar to animal CHAT, probably participates in ACh synthesis from its precursors, choline and acetyl-Coenzyme A. Acetylcholinesterase (ACHE) activity has also been found in many plant tissues. This enzyme decomposes ACh and exhibits properties similar to animal ACHE. The presence of both ChAT and AChE in plant tissues suggests that ACh undergoes similar metabolism in plants as it does in animals. Exogenous ACh affects phytochrome- controlled plant growth and development. Mimicking red light (R), ACh stimulates adhesion of root tips to a glass surface and influences leaf movement and membrane permeability to ions. It also affects seed germination and plant growth. Moreover, ACh can modify some enzyme activity and the course of some metabolic processes in plants. Acetylcholine in the presence of calcium ions (Ca:+), like R stimulates swelling of protoplast isolated from etiolated wheat leaves. It is proposed that the primary mechanism of action of ACh in plant cells is via the regulation of membrane permeability to protons (H+), potassium ions (K+), sodium ions (Na +) and Ca :+ .
dc.description.abstract Acetylcholin (ACh) wurde in Vertretern vieler taxonomischer Gruppen des Pflanzreiches gefunden. Es wird wahrscheinlich inden jungen Bltittern synthetisiert. In einigen Pflanzen hat man daneben Cholin-Acetyltransferase (ChAT)-Activit~t nachweisen k6nnen; dieses Enzym ziegt tihnliche Eigenschaften wie tierische ChAT und ist offenbar an der ACh-Synthese aus sienen Vorstufen Cholin und Acetyl-Coenzym A beteiligt. Acetylcholineesterase (AChE)-Activit~t wurde ebenfalls in vielen Pflanzengeweben gefunden; dieses Enzym spaltet ACh und ziegt ~ihnliche Eigenschaften wie tierische ACHE. Die Anwesenheit yon ChAT und AChE in pflanzlichem Gewebe ltil3t vermuten, dal3 ACh in Pflanzen einem ~ihnlichen Metabolismus unterliegt wie im tierischen System. ~,hnlich wie Rotlicht stimuliert ACh die Anheftung von Wurzelspitzen an Glasoberfltichen und beeinflul3t Blattbewegung und Membranpermeabilit~t far Ionen; dariiber hinaus beeinflul3t es Samenkeimung und pflanzliches Wachstum. Des weiteren kann ACh Enzym-Aktivit~ten modifizieren und dadurch den Ablauf einiher metabolischer Prozesse in Pflanzen. SchlieBlich stimuliert ACh in Gegenwart von Calcium-Ionen (Ca2§ ~ahnlich wie Rotlicht, das Schwellen von Protoplasten etiolierter Weizenbl~itter. Es wird vermutet, dal3 die Primiirwirkung von ACh in Pflanzenzellen durch Regulation der Membranpermeabilit~it far Protonen (H§ Kaliumionen (K§ Natriumionen (Na § und Ca 2§ erfolgt.
dc.language.iso eng
dc.publisher Springer-Verlag
dc.rights info:eu-repo/semantics/openAccess
dc.subject Acetylcholine
dc.subject plants
dc.subject presence
dc.subject metabolism
dc.subject mechanism of action
dc.title Acetylcholine in plants: presence, metabolism and mechanism of action
dc.type info:eu-repo/semantics/article

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