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Titolo:
Control of seed dormancy in Nicotiana plumbaginifolia: post-imbibition abscisic acid synthesis imposes dormancy maintenance
Autore:
Grappin, P; Bouinot, D; Sotta, B; Miginiac, E; Jullien, M;
Indirizzi:
INRA, UMR INA PG Biol Semences, F-78026 Versailles, France INRA Versailles France F-78026 Biol Semences, F-78026 Versailles, France INA PG, Chair Physiol Vegetale, UMR INRA INA PG Biol Semences, F-75231 Paris 05, France INA PG Paris France 05 RA INA PG Biol Semences, F-75231 Paris 05, France Univ Paris 06, UMR Physiol Cellulaire & Mol Plantes, Lab Physiol Dev Plantes, PVI, F-75252 Paris 05, France Univ Paris 06 Paris France 05 Dev Plantes, PVI, F-75252 Paris 05, France
Titolo Testata:
PLANTA
fascicolo: 2, volume: 210, anno: 2000,
pagine: 279 - 285
SICI:
0032-0935(200001)210:2<279:COSDIN>2.0.ZU;2-N
Fonte:
ISI
Lingua:
ENG
Soggetto:
ABA-DEFICIENT MUTANTS; THALIANA L HEYNH; ARABIDOPSIS-THALIANA; EMBRYO DORMANCY; HELIANTHUS-ANNUUS; HORMONE MUTANTS; GERMINATION; FLURIDONE; BIOSYNTHESIS; GIBBERELLINS;
Keywords:
abscisic acid; fluridone; germination; Nicotiana (seed dormancy); seed dormancy;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
41
Recensione:
Indirizzi per estratti:
Indirizzo: Jullien, M INRA, UMR INA PG Biol Semences, Route St Cyr 7, F-78026 Versailles, France INRA Route St Cyr 7 Versailles France F-78026 rsailles, France
Citazione:
P. Grappin et al., "Control of seed dormancy in Nicotiana plumbaginifolia: post-imbibition abscisic acid synthesis imposes dormancy maintenance", PLANTA, 210(2), 2000, pp. 279-285

Abstract

The physiological characteristics of seed dormancy in Nicotiana plumbaginifolia Viv. are described. The level of seed dormancy is defined by the delay in seed germination (i.e the time required prior to germination) under favourable environmental conditions. A wild-type line shows a clear primary dormancy, which is suppressed by afterripening, whereas an abscisic acid (ABA)-deficient mutant shows a non-dormant phenotype. We have investigated therole of ABA and gibberellic acid (GA(3)) in the control of dormancy maintenance or breakage during imbibition in suitable conditions. It was found that fluridone, a carotenoid biosynthesis inhibitor, is almost as efficient as GA(3) in breaking dormancy. Dry dormant seeds contained more ABA than dryafterripened seeds and, during early imbibition, there was an accumulationof ABA in dormant seeds, but not in afterripened seeds. In addition, fluridone and exogenous GA(3) inhibited the accumulation of ABA in imbibed dormant seeds. This reveals an important role for ABA synthesis in dormancy maintenance in imbibed seeds.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 28/11/20 alle ore 12:53:35