About: Changes in cytokinin levels and metabolism in tobacco (Nicotiana tabacum L.) explants during in vitro shoot organogenesis induced by trans-zeatin and dihydrozeatin

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About: Changes in cytokinin levels and metabolism in tobacco (Nicotiana tabacum L.) explants during in vitro shoot organogenesis induced by trans-zeatin and dihydrozeatin Goto Sponge NotDistinct Permalink

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	The uptake and metabolism of trans-zeatin (Z) and/or dihydrozeatin (DHZ), in correlation with cytokinin oxidase/dehydrogenase (CKX) and glucosidase activity, were studied in leaf segments derived from wild-type (WT) and transgenic (T) tobacco (Nicotiana tabacum L. cv. Petit Havana SR1) during in vitro induction of shoot organogenesis. T explants harbored the maize gene Zm-p60.1-glucosidase. Higher levels of shoot regeneration were observed on T explants in the early stages of cultivation. In WT explants, the content of cytokinin (CK)-O- and N-glucosides increased. In T explants, a higher content of Z-9-riboside and its monophosphate and higher CKX activity during the early stage of cultures were found. A positive correlation was obtained for bioactive CK content and the organogenic response in T explants. Our results indicate a connection between the organogenic capacity of tobacco explants, metabolism of endogenous CKs and uptake of exogenous CKs from the cultivation medium. The uptake and metabolism of trans-zeatin (Z) and/or dihydrozeatin (DHZ), in correlation with cytokinin oxidase/dehydrogenase (CKX) and glucosidase activity, were studied in leaf segments derived from wild-type (WT) and transgenic (T) tobacco (Nicotiana tabacum L. cv. Petit Havana SR1) during in vitro induction of shoot organogenesis. T explants harbored the maize gene Zm-p60.1-glucosidase. Higher levels of shoot regeneration were observed on T explants in the early stages of cultivation. In WT explants, the content of cytokinin (CK)-O- and N-glucosides increased. In T explants, a higher content of Z-9-riboside and its monophosphate and higher CKX activity during the early stage of cultures were found. A positive correlation was obtained for bioactive CK content and the organogenic response in T explants. Our results indicate a connection between the organogenic capacity of tobacco explants, metabolism of endogenous CKs and uptake of exogenous CKs from the cultivation medium. (en)
Title	Changes in cytokinin levels and metabolism in tobacco (Nicotiana tabacum L.) explants during in vitro shoot organogenesis induced by trans-zeatin and dihydrozeatin Changes in cytokinin levels and metabolism in tobacco (Nicotiana tabacum L.) explants during in vitro shoot organogenesis induced by trans-zeatin and dihydrozeatin (en)
skos:prefLabel	Changes in cytokinin levels and metabolism in tobacco (Nicotiana tabacum L.) explants during in vitro shoot organogenesis induced by trans-zeatin and dihydrozeatin Changes in cytokinin levels and metabolism in tobacco (Nicotiana tabacum L.) explants during in vitro shoot organogenesis induced by trans-zeatin and dihydrozeatin (en)
skos:notation	RIV/61389030:_____/11:00368520!RIV12-AV0-61389030
http://linked.open...avai/predkladatel	Ústav experimentální botaniky AV ČR, v.v.i.
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(1M06030), P(GAP506/11/0774), P(IAA600380701), Z(AV0Z50380511)
http://linked.open...iv/cisloPeriodika	3
http://linked.open...vai/riv/dodaniDat	2012
http://linked.open...aciTvurceVysledku	Motyka, Václav Holík, Josef Trávníčková, Alena Malbeck, Jiří Macháčková, Ivana
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Ústav experimentální botaniky AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	189810
http://linked.open...ai/riv/idVysledku	RIV/61389030:_____/11:00368520
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	Beta-glucosidase; Cytokinin oxidase/ dehydrogenase; Dihydrozeatin (en)
http://linked.open.../riv/klicoveSlovo	Beta-glucosidase Cytokinin oxidase/ dehydrogenase Dihydrozeatin
http://linked.open...odStatuVydavatele	NL - Nizozemsko
http://linked.open...ontrolniKodProRIV	[9B1CB3166BC8]
http://linked.open...i/riv/nazevZdroje	Plant Growth Regulation
http://linked.open...in/vavai/riv/obor	EB
http://linked.open...ichTvurcuVysledku	5 (xsd:int)
http://linked.open...cetTvurcuVysledku	8 (xsd:int)
http://linked.open...vavai/riv/projekt	Alternative ways regulating intra- and extracellular concentrations and activities of isoprenoid cytokinins in plants Functional genomics and proteomics for crop improvement Integrating proteomic and genomic tools to contribute evolutionary processes across the plant kingdom with emphasis to the family of cytokinins
http://linked.open...UplatneniVysledku	2011
http://linked.open...v/svazekPeriodika	65
http://linked.open...iv/tvurceVysledku	Holík, Josef Klemš, M. Macháčková, Ivana Malbeck, Jiří Motyka, Václav Procházka, S. Slámová, Z. Trávníčková, Alena
http://linked.open...ain/vavai/riv/wos	000297621200001
http://linked.open...n/vavai/riv/zamer	Mechanismy regulace růstu a vývoje rostlin na úrovni buněk, orgánů a celých organismů: fyziologické, genetické a molekulárně biologické základy
issn	0167-6903
number of pages	11 (xsd:int)
http://bibframe.org/vocab/doi	10.1007/s10725-011-9612-z
is http://linked.open...avai/riv/vysledek of	Changes in cytokinin levels and metabolism in tobacco (Nicotiana tabacum L.) explants during in vitro shoot organogenesis induced by trans-zeatin and dihydrozeatin Changes in cytokinin levels and metabolism in tobacco (Nicotiana tabacum L.) explants during in vitro shoot organogenesis induced by trans-zeatin and dihydrozeatin

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