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Titolo:
Benzyladenine-induced inhibition of flowering in Chenopodium rubrum in vitro is not related to the levels of isoprenoid cytokinins
Autore:
Blazkova, A; Machackova, I; Eder, J; Krekule, J;
Indirizzi:
Acad Sci Czech Republ, Lab Plant Morphogenesis, Inst Expt Bot, CR-16502 Prague 6, Czech Republic Acad Sci Czech Republ Prague Czech Republic 6 2 Prague 6, Czech Republic
Titolo Testata:
PLANT GROWTH REGULATION
fascicolo: 2, volume: 34, anno: 2001,
pagine: 159 - 166
SICI:
0167-6903(200106)34:2<159:BIOFIC>2.0.ZU;2-D
Fonte:
ISI
Lingua:
ENG
Soggetto:
PLANT SINAPIS-ALBA; PHARBITIS-NIL; XANTHIUM-STRUMARIUM; GROWTH-REGULATORS; ROOT; METABOLISM; TRANSITION; TRANSPORT; INDUCTION; LEAVES;
Keywords:
benzylaminopurine; Chenopodium rubrum; cytokinins; leaf primordia initiation; photoperiodic flower induction;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
33
Recensione:
Indirizzi per estratti:
Indirizzo: Machackova, I Acad Sci Czech Republ, Lab Plant Morphogenesis, Inst Expt Bot, Rozvojova 135, CR-16502 Prague 6, Czech Republic Acad Sci Czech Republ Rozvojova 135 Prague Czech Republic 6
Citazione:
A. Blazkova et al., "Benzyladenine-induced inhibition of flowering in Chenopodium rubrum in vitro is not related to the levels of isoprenoid cytokinins", PLANT GR R, 34(2), 2001, pp. 159-166

Abstract

The effect of 6-benzylaminopurine (BAP) on flowering and on endogenous levels of isoprenoid cytokinins was investigated in explanted terminal shoots of Chenopodium rubrum cultivated in vitro. The mother plants were grown under continuous light and explants were cut off when the 6th leaf primordium originated at the shoot apex. The explants were exposed to one dark period of 13 hours inductive for flowering or to continuous light on medium with or without BAP (0.05;0.2;0.4 mg.l(-1)). Under non-inductive conditions no flowering was observed either in the control or after BAP treatment. After receiving one inductive dark period, the control explants flowered. However, BAP application either at the beginning of the inductive dark period and/orduring the following light cultivation inhibited flowering and stimulated initiation and growth of leaf primordia. In the case of the most efficient BAP concentration (0.05 mg.l(-1)) flowering was inhibited by 80% and the number of leaf primordia was increased by 3. Explantation caused a significant increase in the total amount of endogenous cytokinins in the explants within first 13 h, provided they were kept in light. When explants were kept in darkness, only a slight increase in cytokinin levels was observed. BAP treatment had no influence on the levels of endogenous cytokinins either in light or in darkness. We may thus conclude, that BAP application inhibited flowering of photoperiodically induced terminal shoot explants and stimulated leaf primordia formation with no significant effect on changes in levels of endogenous isoprenoid cytokinins, This may suggest the direct ability ofBAP to regulate morphogenesis.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 04/07/20 alle ore 18:08:43